Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Cary Austin

Pages: 1 ... 67 68 [69] 70 71 ... 104
1021
Applications / Another Grundfos SQE with CU301 control replaced with CSV
« on: November 06, 2014, 11:59:51 AM »
CU301 for Grundfos SQE before CSV


CU301 removed, CSV installed


Well, it’s done. I finally swapped out my Grundfos CU301 well controller for a CSV1Z Cycle Stop Valve. This was the fourth CU301 that failed in my home in a little over 3 and a half years of home ownership (new construction). The original CU301 didn’t last through construction and was replaced prior to our moving in. It failed about 4 months after we moved in prompting another replacement, all under warranty. Eighteen months ago it died again which cost me $750 to be replaced, $500 of which was refunded to me by the well guy after I pointed out that it should still be under warranty (he subsequently told me that he ended up eating that cost). The latest CU301 passed in the night in early June prompting me to swear that Grundfos would never see another nickel of my money.

 The flat out failures were a pain, but so too were the intermittent failures, the low pressure incidents that caused a chain reaction and dumped all the water in the house onto my basement floor, the air in the lines a number of times, and the curious behavior during low-demand times (like when the water softener recharged). All of those things added up and totally turned me off to this system.

 The plumber couldn’t make it out the day it died so I took matters into my own hands. Now, I’m not a plumber and I don’t play one on the internet, but I’m an analyst and problem solver and I figured that I could solve this problem – by myself – and have it exactly how I wanted it…..and of course have no one else to blame by myself.

 If you look at the CU301 Installed picture, you can see a few things that at first don’t make a ton of sense but once you’ve been to 35 home improvement stores, things begin to click. The water main comes in through the wall on the lower right side of the picture, travels to the left and terminates into a manifold. These things are stock pieces that every plumber uses when they install a well pump and they have standard fittings and the same number of holes and such. From what I can tell, virtually every plumber builds these things the same way, all using a manifold such as you see here. The pressure sensor for the CU301 is right above a pressure bleeder that will fill your basement with water if something goes horribly wrong. To the left of that is the pressure gauge, then the pressure tank and below that the draining spigot. The manifold ends and in my case, the pipe travels up and has the main valve, then back to the right a bit, and then up once more into the domestic water supply.

 To get myself back in business when the CU301 died, I needed a pressure switch, a 3” piece of brass pipe to thread into the switch, and a connector to convert the ½” extension pipe to the ¾” hole left when I removed the CU301’s pressure sensor. Next, the pressure sensor is wired to the electrical box. I opted to use flexible conduit and ran my wires through there. The pressure switch has spots for 4 wires, two FROM the electrical box, and two more back TO the electrical box. The Grundfos setup only uses two wires so you don’t need one of those goofy pump controller boxes they sell, I just took the wires from the panel that were in the box, hooked them up to two wires going to the pressure switch, then wired the two wires coming back from the pressure switch to the well pump wires. Once I got my arms around what needed to happen, it only took a few minutes. The power was switched OFF for this. Then all I needed to do was shut off the water supply to the house, remove the CU301’s pressure sensor and screw in my pressure switch assembly.

 So now I was back in business. My CSV1Z arrived in a few days and I took it to my favorite local hardware store and started looking at parts to connect everything up. The idea here is that you have to remove a section of pipe from between the inlet into the house and the manifold and install the CSV there. This can be tricky. I’m not a pipe-sweater guy and this could be tricky, especially with the lack of real space, lack of experience and lack of stuff do it with. I ended up with a pile of connectors, fittings, flux, soldier, cleaning cloths, etc to the tune of about $40 bucks. Then it occurred to me that maybe there was a better way. So I dug around a little more and sure enough, I found appropriately sized SharkBite connectors. All I needed was two. The thread onto the CSV with some Teflon tape and clean pipes. I cut the pipes down as needed, cleaned them up good with the reamer and 3M Scotchbrite pads and reassembled the whole thing. The more savy people will notice that there is a 2nd Sharkbite connector on the upper horizontal piece of the completed assembly. That’s not a mistake. The original setup intruded slightly into the adjacent room so there was no room to open or close that valve once a wall was put up. I elected to shorten the whole assembly and add two supporting brackets under the lower part of the assembly, one on either side of the manifold. This also gives options down the road – if I need to change anything or swap out the Sharkbite connectors, I can do it without having to do any cutting or soldering.

 Anyway, that’s the assembly. Lot’s easier and less intimidating than you’d think. Adjust the pressure switch and CSV per the instructions and go back to enjoying your life!

 But, how’s it work!! Well, with the pressure switch alone, a shower with a single shower head going was clearly cycling. The flow would slow down very gradually and eventually jump up dramatically as the pump kicked in and the pressure rose quickly. This cycle continued for the duration of the shower or whatever you were using water for. Once the CSV was installed and set up, the pump kicks in shortly after there is demand for water and then stays on for the duration at the pressure you’ve set the CSV for. That assumes you set up the valve correctly. I had originally had the pressure switch too low so the pump was still cycling. Adjusting it so the pressure switch cut-in was just slightly below the pressure of the CSV did the trick. It works great now.

 All in all I’m very pleased with how it works. I’ve been living with it now for about 5 weeks and there hasn’t been any issues with the valve. It’s working exactly as advertised. I’m looking forward to many carefree years of service from this setup.

 Thanks for all your help, Cary.

 John
 Richfield WI





 See also:
http://www.cyclestopvalves.com/simple/home.php
http://www.cyclestopvalves.com/csv-vs-vfd_1.html
http://www.cyclestopvalves.com/csv-vs-vfd_17.html
http://www.cyclestopvalves.com/csv-vs-vfd_19.html
http://cyclestopvalves.com/smf/index.php?topic=89.0
http://cyclestopvalves.com/smf/index.php?topic=85.0

1022
Applications / List of Many Different Systems That use CSV's
« on: November 06, 2014, 11:43:40 AM »
 Homeowner Info Video
http://www.cyclestopvalves.com/video/commercial-dsl.wmv

 Pside-Kick video
http://www.cyclestopvalves.com/video/pside-kick-dsl.wmv

 The CSV......
 * Eliminates pump cycling.
 * Reduces energy consumption when flow is reduced.
 * Extends the life of pumps, motors, and controls.
 * Eliminates water hammer and line breaks.
 * Maintains constant pressure through any range of flow.
 * Works with a very small pressure tank.
 * Replaces VFD or so called “constant pressure pumps”.

Domestic

 For use with water well pumps and booster pumps, the Cycle Stop Valve (CSV) turns any pump into a variable flow, constant pressure system. Working in conjunction with a small pressure tank, the CSV is usually adjusted to the middle of the pressure switch range. IE; 40/60 PSI switch, 50 PSI CSV. The size of the pressure tank determines how much water can be used by the house, before the pressure drops to 40 PSI, and the pressure switch starts the pump. As long as flow rates in and around the house vary from 1 GPM to as much as the pump can produce, the CSV maintains a constant 50 PSI on the system. When there is no more flow required for the house, the CSV allows the little pressure tank to fill to 60 PSI, and the pump is shut off by the pressure switch.

 The CSV system uses a very small pressure tank, usually containing 1 gallon of water or more, to allow a well pump or a booster pump to remain off during small requirements for water. The CSV will also work with larger tanks but, since the CSV controls the pressure and flow, large pressure tanks are not required.

 The CSV has state of the art technology, designed to mimic the “constant pressure” control of Variable Frequency Drive, VFD, or “so called” constant pressure pumps. Requiring no electronics, and therefore using no extra power, the CSV eliminates the problems long associated with VFD control.

Irrigation

 Mist, Drip, Spray, or Big Guns, the Cycle Stop Valve (CSV) turns any Submersible, Turbine, or Centrifugal pump into a variable flow, constant pressure system. The CSV maintains a constant pressure on the irrigation system throughout a wide range of flow. Eliminating line breaks and leaks, while precisely applying an exact amount of water, the CSV can conserve water as well as energy.

 The CSV has state of the art technology, designed to mimic the “constant pressure” control of Variable Frequency Drive VFD, or “so called” constant pressure pumps. Requiring no electronics, and therefore using no extra power, the CSV eliminates the problems long associated with VFD control.

 The pressure controlled CSV reacts extremely fast to changes in the system demand. This counteracts negative and positive transient pressure waves, by cancelling them out with an equal and opposite pressure wave. Eliminating transient pressure waves, and the subsequent water hammer they cause, can conserve vast amounts of water and energy. Eliminating water hammer also helps keep the pipe in the ground and eliminates expensive repairs.

Industrial

 High Rise Buildings, Factories, Industrial Plants, and others, can use the Cycle Stop Valve (CSV) to turn any Submersible, Turbine, or Centrifugal pump into a variable flow, constant pressure system. The CSV maintains a constant pressure on the water system throughout a wide range of flow. Eliminating line breaks and leaks, while precisely providing any amount of water required, the CSV can conserve water as well as energy.

 The CSV has state of the art technology, designed to mimic the “constant pressure” control of Variable Frequency Drive VFD, or “so called” constant pressure pumps. Requiring no electronics, and therefore using no extra power, the CSV eliminates the problems long associated with VFD control.

 The pressure controlled CSV reacts extremely fast to changes in the system demand. This counteracts negative and positive transient pressure waves, by cancelling them out with an equal and opposite pressure wave. Eliminating transient pressure waves, and the subsequent water hammer they cause, can conserve vast amounts of water and energy. Eliminating water hammer also protects the piping system and eliminates expensive repairs.

Commercial

 Laundries, Car and Truck Washes, Concrete Batch Plants, Fish Farms, and many others can use the Cycle Stop Valve (CSV) to turn any Submersible, Turbine, or Centrifugal pump into a variable flow, constant pressure system. The CSV maintains a constant pressure on the water system throughout a wide range of flow. Eliminating line breaks and leaks, while precisely providing any amount of water required, the CSV can conserve water as well as energy.

 The CSV has state of the art technology, designed to mimic the “constant pressure” control of Variable Frequency Drive VFD, or “so called” constant pressure pumps. Requiring no electronics, and therefore using no extra power, the CSV eliminates the problems long associated with VFD control.

 The pressure controlled CSV reacts extremely fast to changes in the system demand. This counteracts negative and positive transient pressure waves, by cancelling them out with an equal and opposite pressure wave. Eliminating transient pressure waves, and the subsequent water hammer they cause, can conserve vast amounts of water and energy. Eliminating water hammer also protects the piping system and eliminates expensive repairs.

Municipal

 Cities, Towns, Sub Divisions, Mobile Home Courts, High Rise Buildings, and many others can use the Cycle Stop Valve (CSV) to turn any Submersible, Turbine, or Centrifugal pump into a variable flow, constant pressure system. The CSV maintains a constant pressure on the water system throughout a wide range of flow. Eliminating line breaks and leaks, while precisely providing any amount of water required, the CSV can conserve water as well as energy.

 The CSV has state of the art technology, designed to mimic the “constant pressure” control of Variable Frequency Drive VFD, or “so called” constant pressure pumps. Requiring no electronics, and therefore using no extra power, the CSV eliminates the problems long associated with VFD control.

 The pressure controlled CSV reacts extremely fast to changes in the system demand. This counteracts negative and positive transient pressure waves, by cancelling them out with an equal and opposite pressure wave. Eliminating transient pressure waves, and the subsequent water hammer they cause, can conserve vast amounts of water and energy. Eliminating water hammer also protects the piping system and eliminates expensive repairs.

 Vast resources are being poured into finding and repairing leaks in the infrastructure to conserve our precious fresh water supplies. Without first finding and eliminating the cause of transient pressure waves, which causes water hammer and line breaks, repairing leaks can be a futile effort. Leaks in the system act as pressure relief for water hammer. Repairing the leaks with out first addressing the cause of the water hammer, causes leaks to re-appear as fast as they are repaired.

 The CSV is the only pump control technology that reacts fast enough to have transient pressure wave canceling technology. The CSV can eliminate the need for water towers. The CSV can also work with water towers in many ways. The CSV can maintain a more constant level in an elevated tank than any altitude valve. The CSV can also boost from water towers, increasing the pressure and effectively making a water tower seem taller, without extending the legs.

 Other Possible Applications for Cycle Stop Valves
GOLF COURSES 
MUNICIPAL WATER SUPPLIES
RURAL WATER SUPPLIES 
BOOSTER SYSTEMS
NURSERIES 
LANDSCAPING
SCHOOLS 
HOSPITALS
CHURCHES 
SINGLE HOMES
APARTMENT COMPLEXES 
CATTLE FEED YARDS
HOG FARMS 
CHICKEN FARMS
DAIRIES 
MEAT PACKING PLANTS
EGG FACILITIES 
FISH HATCHERIES
FOUNTAINS 
HIGH RISE BUILDINGS
SNOW MACHINES 
FIRE TRUCKS
SPORTS FIELDS 
SHIP WATER SYSTEMS
HEAT PUMP SYSTEMS 
OSMOSIS SYSTEMS
OZONE SYSTEMS 
DRIP SYSTEMS
ORCHARDS 
VINEYARDS
TREE FARMS 
FOOD PROCESSING PLANTS
LUMBER MILLS 
MINING
CARBON FIBER PLANTS 
ZOO WATER AND IRRIGATION
MANUFACTURING PLANTS 
PRISON FACILITIES
REPLACE OR REPAIR WATER TOWERS 
CATTLE RANCHES
CONCRETE PLANTS 
CONSTRUCTION FACILITIES
CAR WASH
MACHINE  TOOL COOLING
DUST CONTROL SPRINKLERS 
TRUCK WASH OUT
BIG GUN SPRINKLERS 
RAIL CAR WASH OUT


“I set the valve.....it works perfectly. ...No more unnecessary cycling of the pump. Thank you very much for a great product and excellent customer service. You have gained a new customer!”
Maurer Well Drilling
 Black River Falls, WI

“ This system is almost maintenance free. I can actually sleep at night and know my system is working. Its that dependable. There are no high tech components to deal with, so I can understand my system. Simplicity is crucial to the success of my overall operation.”
Canadian Golf Course
 Canadian, TX

“ You have made believers out of us. Just how easy they do work. The mining people were impressed with the valve operation and that we had solved their problems with pumps cutting on and off and broken water lines.”
Polk Pump & Irrigation Company, Inc.
 Lakeland, FL

1023
Applications / 80 Gallon Tank Replaces 12,000 Gallon Tank
« on: November 06, 2014, 11:33:49 AM »
Marion County, Florida is using a 4" Cycle Stop Valve and an 80 gallon bladder tank to replace a 12,000 gallon hydro pneumatic tank. Several community water systems in Marion County are using Cycle Stop Valves and small bladder tanks to supply "constant pressure" to their customers. These systems are set up to be temporary, while the huge pressure tanks are off line for service and cleaning. However, it should be noticed that the system pressure is much better controlled, and the pump cycling and water hammer events have disappeared after installing the CSV's.

This picture shows the submersible well pump being controlled by a Cycle Stop Valve and an 80 gallon pressure tank. The 12,000 gallon tank that is out of service is pictured in the background.

This picture is of the pressure-recording chart for a week of service. The first 5 days of this chart was with the 12,000 gallon tank, the last two days shows the recorded pressure for the CSV controlled system. In the first 5 days with the big pressure tank, there was 291 cycles. That is 2.38 cycles per hour, 57 cycles per day, or about 21,000 cycles per year. Notice the regular "heartbeat" on the graph as the pump cycles on the big pressure tank. Each "heartbeat" represents a water hammer event that happens throughout the entire system. It also represents considerable abuse on the pump, motor, controls, check valve, and piping system. The system is continually cycling between 53 and 72 PSI. This is also the variation in pressure that all the customers are feeling.

After the installation of the Cycle Stop Valve, notice that the "heartbeat" has completely disappeared. The pressure is maintained very close to a constant 60 PSI. Only a few times during peak demands does the system pressure drop to about 50 PSI. This will eliminate all the abuse usually suffered by the pump, motor, controls, and check valves, that happens with the big pressure tank system. The customers on the system will benefit from the "constant pressure" being supplied while the big pressure tank is out for service.

The operator of these systems said they will be using a CSV full time on some systems that have an even worse cycling problem. Hopefully we will also soon be getting information on the energy use before and after installing the CSV.

 Conserving Water Video
http://www.cyclestopvalves.com/video/conserving_water-dsl.wmv

 5HP Sub Water Hammer Video
http://www.cyclestopvalves.com/video/5hp_waterhammer-dsl.wmv

 500 GPM and Multi-pump Video
http://www.cyclestopvalves.com/video/csv-dsl.wmv

1024
Applications / Alternatives to Water Towers and Hydro Tanks
« on: November 06, 2014, 08:41:40 AM »

Water Towers can be expensive to maintain


Standpipes have lots of problems!


Pressure tanks can explode like this one


CSV and 80 gallon tank replaces 12,000 gal hydro tank or water tower





 The old way of system control was to fill a water tower or pressure tank and shut off the pump. The system demand would then empty the tank and the pump would be restarted. This process is repeated over and over because system demand is usually much less flow than the pump produces. The tank is repeatedly filled at maximum pump flow and drained at the rate of demand. This cycling on and off of the pump system causes a multitude of problems. Everything from the generators at the power station to the plumbing in individual houses or irrigation systems is stressed from the cycling of the pump. End rush currents from pumps starting stresses electrical components in the power grid from the generator to the pump motor itself. Water hammer and surge from pumps starting and stopping stresses tanks, valves, and all piping in the distribution system. Long water lines between the pump and the pressure tank, water tower, or storage tank are especially vulnerable. Changing the flow in these long lines from a dead stop to full pump flow then back to a dead stop, can cause tremendous surges, or swings in pressure, that are responsible for numerous and expensive line breaks.

 Cycle Stop Valves vary the pump output to exactly match the demand. A jockey and or a base load pump runs continuously and is throttled with a Cycle Stop Valve to exactly match the demand. When demand is greater than these small pumps can produce, larger pumps are brought on line as needed, and their output is throttled with a Cycle Stop Valve to continue matching the flow demanded. When flow demanded is reduced, larger pumps are turned off when no longer needed. The base load and or jockey pump will continue to run matching smaller flow rates as long as at least 5 GPM is being demanded. Continuous and instantaneous matching of the demand instead of completely starting and stopping the flow eliminates pressure surges in pipelines and reduces end rush required to frequently start pump motors. Continuous matching of the demand also reduces or eliminates the need for large pressure tanks and water towers, further benefiting the system.

 Large hydro tanks are designed to limit the number of pump cycles, not for water storage. A 10,000 gallon hydro tank only has about 1,200 gallons of useable water, the rest is air space. During a power outage this 1,200 gallons of useable water only gives a few minutes of water as pressure rapidly decreases to nothing. A water tower will deliver more water during a power outage but, depending on the rate of usage at the time, could still be out of water in a couple of hours. Real backup water supply means being able to utilize water from the main reservoir during a power outage. A backup generator or a diesel powered backup pump can continue to supply the system as long as there is water in the main reservoir. This can change the backup water supply from minutes or a couple of hours to several days, weeks, even months if need be. These backup pumps or generators can give an almost unlimited supply of water for a fraction of the price of a water tower.



 Conclusion
 The Cycle Stop Valve eliminates problems associated with ordinary pump control valves and variable speed drives. Pumps have a guaranteed minimum flow, run at a constant speed, powered by smooth AC power, without cycling. The system benefits from a constant and steady pressure eliminating devastating pressure surges and the need for expensive pressure tanks and water towers. The Cycle Stop Valve is completely mechanical, designed to hold a constant downstream pressure, and basically leak 5 GPM through when in its fully closed position. The simplicity of the Cycle Stop Valve eliminates the need for complicated and expensive controls. While electronic systems can be used for monitoring purposes, the less they have to do with actual operation of the system, the more dependable the supply of water. Pumps equipped with a Cycle Stop Valve can be controlled by systems such as SCADA. However, we have been told that one of the greatest benefits of the Cycle Stop Valve is that, when all the electronic systems have failed, pumps can be turned on manually to continue the supply of water, without harming the pump or system in anyway.

 Different states and countries handle constant pressure systems differently. Some states, like Florida and Washington are trying to improve the quality and delivery of water to their people. These states have added constant pressure valves to their building codes or design manuals for municipal systems. Consumers in these states are enjoying a constant pressure supply of water, a decrease in cost and footprint of water supply systems, elimination of contamination and waste that goes along with water hammer, and a renewed respect for their state engineers. Other states have been slow to adopt constant pressure systems. These states are wasting taxpayer money on water towers, large pressure tanks, energy, and pump maintenance that could be better put to use on things like schools, roads, and the welfare of the people. Engineers should be educating themselves on new and beneficial innovations instead of sitting back in their comfort zone and continuing to use old technology.

 Conserving Water Video
http://www.cyclestopvalves.com/video/conserving_water-dsl.wmv

 5HP Sub Water Hammer Video
http://www.cyclestopvalves.com/video/5hp_waterhammer-dsl.wmv

 500 GPM and Multi-pump Video
http://www.cyclestopvalves.com/video/csv-dsl.wmv

1025
Applications / CSV makes Water Tower Seem Taller
« on: November 06, 2014, 08:24:39 AM »
A booster pump using a Cycle Stop Valve can take the 25 PSI coming from your too short water tower and boost pressure to the 50 PSI or more if needed. Follow the scenario below.

 Example with supply coming from a well field:
 Two 1,000 GPM supply wells and a water tower, all in different locations, on a common or looped system feed 1,000 connections. Pressure in the system is limited by the height of the tower. Some parts of the city only receive 25 PSI. The two well pumps could be turned up to supply as much pressure as needed but the tower would overflow.

 At the bottom of the water tower we attach a pump system and a manifold. This manifold includes a solenoid valve with pressure sustain to let water into the tower. This solenoid valve is controlled by the level probes in the tower or SCADA. A check valve is on a separate line that will always allow water out of the tower if, the pressure in the tower ever becomes more than the pressure in the system. The third line in the manifold contains a booster pump with a Cycle Stop Valve. This pump will boost water from the tower to a higher pressure and then into the distribution, increasing the system pressure without increasing the height of the tower. The flow from this pump is controlled by a Cycle Stop Valve, and a pressure switch attached to a 44 gallon bladder tank turns the pump on or off. The two 1,000 GPM well pumps are also both fitted with their own Cycle Stop Valves, small bladder tanks, and pressure switches.

 The booster pump should supply about twice the average demand or in this case about 100 GPM. The Cycle Stop Valve on this booster pump will supply 60 PSI constantly to the distribution system, even as flow needed changes from about 3 GPM to 100 GPM. If flow needed increases above 100 GPM, the booster pump will no longer be able to keep the pressure at 60 PSI. When the system pressure drops to 55 PSI a pressure switch on one of the supply wells starts the well pump. The Cycle Stop Valve on this well pump will maintain 55 PSI on the system, adding only what extra flow is needed over what the booster pump is already supplying. If the booster pump is already supplying 100 GPM , and 120 GPM is being used in the city, then the Cycle Stop Valve will make the well pump supply only the extra 20 GPM. With both the booster pump and first well pump running a total of 1100 GPM could be used at 55 PSI. If more than 1100 GPM is needed the pressure will drop to 50 PSI and the second well pump is started. The Cycle stop Valve on the second well pump will maintain 50 PSI on the system while demand increases from 1105 GPM to 2100 GPM. When demand again decreases below 1100 GPM the Cycle Stop Valve on the first well pump will bring the system pressure up to 55 PSI, triggering a pressure switch, which is located at the second well pump, to shut the second well pump off. When the demand in the system drops below 100 GPM, the Cycle Stop Valve on the booster pump will bring the system pressure up to 60 PSI, and the other well pump will be shut off. With this many connections the booster pump should always be running, supplying from 3 GPM to 100 GPM to the system at a constant 60 PSI. Only if the system requires zero flow will the booster pump fill the 44 gallon tank to 70 PSI and be shut off.

 Anytime during the operation of any or all pumps the water tower could become low. At this point the probes in the tank will signal the solenoid valve at the base of the tower to open, and also shut down the booster pump. With the tower filling and the booster pump off, the pressure will drop to 55 PSI and the first well pump will be started. If the pressure sustain feature on the solenoid valve is set to hold 54 PSI the first well pump will run at max flow until the tower is refilled. If the pressure sustain feature is set at 49 PSI, both well pumps will be running at max flow, supplying the use in the city while refilling the tower. When the tower is again full, the probes will signal the solenoid valve to close and also restart the booster pump. If demand on the system is less than 100 GPM, the Cycle Stop Valve on the booster pump will bring the system pressure up to 60 PSI, and both well pumps will be shut off.

 During a power out condition, the water in the tower would still be available for emergency use, through the one-way check valve leaving the tower.

 This same type set up would work with a ground storage tank instead of a water tower. The only difference being that water for emergency use during a power outage, would need to be pumped from the ground storage tank with a pump running on alternate power. A diesel powered pump or a back up generator for the electric pump could make emergency water from a ground storage tank dependable and much less expensive than an elevated tank.

 If chlorination is required, use variable flow chlorine injectors at the discharge of each well pump.

 Example with supply coming from a high-pressure supply line:
 This type system will also work if the supply water is coming in from a high-pressure line instead of supply wells. A pressure-reducing valve on the high-pressure line can be turned up to the pressure needed in the city. Normally this higher pressure would overflow the water tower. However, in this case we will be filling the water tower through a solenoid valve. When the tower is full, a level control in the tower will open a switch, which closes the solenoid valve and stops the tower from filling any further. The city is then getting the pressure they need directly off the high-pressure line. The tower is really no longer needed except for times when the power is off. However, we need to keep the water that is in the tower from becoming stale. A small booster pump is attached to the bottom of the tower and once per day this booster pump comes on. A Cycle Stop Valve on this booster pump is set at a pressure slightly higher than the pressure of the high-pressure supply line. The booster pump lowers the level in the tower until a low level probe is reached which opens the solenoid valve to refill the tower. At the same time the low level probe opens the solenoid valve it also turns off the booster pump. This allows the city to again operate directly from the high-pressure supply line. This system will increase the pressure supplied to the city without having to increase the height of the tower. This system also keeps the tower full so if there is a power out condition, you still have a tower full of water that is supplied directly to the city through a one-way check valve. With the power off, you will still have a tower full of water to use but, it will be at a lower pressure which is dependent on the height of the tower.

1026
Applications / CSV and 80 gal tank replaces Water Tower
« on: November 06, 2014, 08:19:52 AM »
Three CSVs on Three 200 HP Pumps, with 80 Gallon Pressure Tank. Water Tower was removed for service. System has better pressure, less cycling, and No Water Hammer with CSV than with Water Tower.

 The old way of system control was to fill a water tower or pressure tank and shut off the pump. The system demand would then empty the tank and the pump would be restarted. This process is repeated over and over because system demand is usually much less flow than the pump produces. The tank is repeatedly filled at maximum pump flow and drained at the rate of demand. This cycling on and off of the pump system causes a multitude of problems. Everything from the generators at the power station to the plumbing in individual houses or irrigation systems is stressed from the cycling of the pump. End rush currents from pumps starting stresses electrical components in the power grid from the generator to the pump motor itself. Water hammer and surge from pumps starting and stopping stresses tanks, valves, and all piping in the distribution system. Long water lines between the pump and the pressure tank, water tower, or storage tank are especially vulnerable. Changing the flow in these long lines from a dead stop to full pump flow then back to a dead stop, can cause tremendous surges, or swings in pressure, that are responsible for numerous and expensive line breaks.

 Cycle Stop Valves vary the pump output to exactly match the demand. A jockey and or a base load pump runs continuously and is throttled with a Cycle Stop Valve to exactly match the demand. When demand is greater than these small pumps can produce, larger pumps are brought on line as needed, and their output is throttled with a Cycle Stop Valve to continue matching the flow demanded. When flow demanded is reduced, larger pumps are turned off when no longer needed. The base load and or jockey pump will continue to run matching smaller flow rates as long as at least 5 GPM is being demanded. Continuous and instantaneous matching of the demand instead of completely starting and stopping the flow eliminates pressure surges in pipelines and reduces end rush required to frequently start pump motors. Continuous matching of the demand also reduces or eliminates the need for large pressure tanks and water towers, further benefiting the system.

1027
Applications / Open Loop Geo Systems
« on: November 05, 2014, 04:57:09 PM »




 Homeowner Info Video
http://www.cyclestopvalves.com/video/commercial-dsl.wmv

 Pside-Kick video
http://www.cyclestopvalves.com/video/pside-kick-dsl.wmv

 For many years I have heard form owners of open loop geo systems that pumping cost quickly takes a back seat to the cost of continually replacing the pump system. With variable demands form a house/geo combination, regular pumps using pressure tanks, would cycle themselves to death on a regular basis. It doesn’t take long to figure out that spending an extra 20 dollars a month on electricity and having a pump system last 20 years, would be far less expensive than saving 20 bucks a month on electricity using pump systems that must be replaced every 3 to 5 years or less.

 In the last 10 years or so I have been hearing these same complaints from people who are using variable speed pumps. I have been working with variable speed pumps for more than 20 years, so I understand them very well. Whether you want to believe it or not, variable speed pumps were designed as a cash cow for the manufacturer, not to save you money. Manufacturers claim they save energy, which is the “hook” that snags most people. The reality is VFD’s always increase the energy used per gallon. Even when running at full RPM, the parasitic losses of a VFD cause you to get fewer gallons per kilowatt used.

 There is nothing more efficient than a properly sized standard pump, running at it’s best efficiency point, and drawing pure sinusoidal power directly from the grid. The VFD control itself uses extra energy, and the harmonics and stray voltage they produce cause the motor to be about 5% less efficient. Then when you have a unit drawing 1.5 HP while producing 30 GPM, it is using more energy per gallon when slowed to produce 5 GPM and still drawing a 3/4 HP load. 1.5 HP producing 30 GPM is drawing .05 HP per gallon. The same pump slowed to 5 GPM and still drawing a 3/4 HP load is using .15 HP per gallon produced. This is 3 times more energy used than a properly sized pump.

 However, the biggest expense is because of “planned obsolescence”, which is the main reason manufacturers have for designing variable speed pumps. They can more easily predict and plan the length of time for failure of a pump system. With standard pumps using pressure tanks, the number of cycles would determine the life of the pump system. Manufacturers had built in enough quality for the pump to cycle an average of 7 years before it failed. Then things like Cycle Stop Valves came along that reduce the number of cycles considerably, and would triple or quadruple the life of pump systems. This was completely unacceptable to pump manufacturers, so they quickly devised a plan to use variable speed technology that had been used in industrial applications since 1968, to compete with the constant pressure performance of the CSV in residential applications.

 They designed little Driemel tool size pumps that only weigh 11 pounds and spin 10,600 RPM, with computerized electronics built into the motor. These will last many times less than standard heavy-duty pumps that were built like bench grinders that weigh 40 pounds, only spin 3450 RPM, and do not have any electronic components. Then they lie about variable speed pumps saving energy to make you think it is the “green” thing to do. Once you buy into the variable speed hype, you are locked into a perpetual cycle of regular and expensive replacements, which is how they keep the cash flow flowing through these big corporations. Usually after people have been through 3 or 4 of these, they realize that saving energy is more about longevity of the equipment, than supposedly saving a few bucks a month on the electric bill. Then after switching back to a standard type pump, they discover that they were never actually saving even a few bucks a month with the previous variable speed systems.

 The best way to save energy and make the pump system last with a geo open loop is to use a 2 pump set up. You need as small a well pump as you can get that will produce 30 GPM at low pressure. Then you can use a jet pump as a booster to the house, to increase pressure for the showers and sinks.

1028
Applications / Two Pump System for Open Loop Geo
« on: November 05, 2014, 04:55:41 PM »




 Homeowner Info Video
http://www.cyclestopvalves.com/video/commercial-dsl.wmv

 Pside-Kick video
http://www.cyclestopvalves.com/video/pside-kick-dsl.wmv

 To cut pumping cost for a heat pump, a two-pump system is recommended. This system uses a 25S10-7 pump end, with a 1 HP motor. This pump would deliver 27 GPM at 100' of lift. Control this well pump with a 20 PSI Cycle Stop Valve, a small pressure tank, and a 10/30 pressure switch. After the pressure tank, one line tees off to the heat pump, another tees off to a booster pump for the house. Use about a 3/4 HP jet pump with it’s own Cycle Stop Valve set at 50 PSI, and a 40/60 pressure switch.

 When the heat pump alone is running, an electric discharge valve opens, the pressure tank drains to 10 PSI, and the pump starts. The 20 PSI CSV will vary the flow to match a single 10 GPM heat pump, two 10 GPM heat pumps, or two 10 GPM heat pumps while still providing up to 10 GPM for the house, which a total of 30 GPM. This should cut your pumping cost by more than 1/2 of what a single 2 HP pump can do. When the heat pump shuts off, the electric discharge valve closes, and the CSV slowly fills the pressure tank to 30 PSI, and the well pump is shut off.

 When the house alone is using water, the pressure will drop from 60 to 40 PSI and the 3/4 HP jet pump will start. The 50 PSI CSV will maintain 50 PSI to the house no mater the flow rate being used. This jet pump system is drawing water from the well pump system, so the pressure tank on the well pump system empties as the pressure drops from 30 to 10 PSI, and the well pump is started. The CSV on the well pump feeds exactly as much water to the jet pump booster as the house is using. Both pumps run as long as the house is using water. When the house stops using water, the CSV on the jet pump will slowly fill the pressure tank to 60 PSI, and the jet pump is shut off. Then the CSV on the well pump will slowly fill it’s pressure tank to 30 PSI, and the well pump is shut off.

 When the heat pump(s) is/are running, the well pump/CSV is delivering 10 or 20 GPM at 20 PSI. If the house needs water at the same time, the jet booster pump comes on, and the CSV on the well pump opens up to supply both the heat pump and the jet booster pump. With a 100' pumping level, you should be able to get 30 GPM total when the house and both heat pumps need water at the same time. When the house no longer needs water, the jet pump system will fill it’s pressure tank to 60 PSI, and the jet pump is shut off. Then the CSV on the well pump reduces the flow to 10 or 20 GPM, matching the amount used by the heat pump(s). Again, when both heat pumps are shut off, the well pump fills it’s pressure tank to 30 PSI, and both pumps stay shut off until water is needed again.

 Reducing the main well pump from a 2 HP to a 1 HP will cut the pumping cost considerably. The only time both pump will run at the same time is when water is being used in the house. The house will use very little water compared to the heat pumps, so the added electric for the booster pump won’t add up to much. If the system is also used for irrigation about 500 hours a year, both pumps will run this amount of time.

 The 2 HP single pump system with CSV described earlier will use $942.00 per year, or $78.50 per month.

 The 2 HP single pump system with VFD described earlier will use $751.00 per year, or $62.58 per month.

 The 2 pump system with CSV control described here will use $631.00 per year, or $52.58 per month.

 The 2 pump system will save considerable energy over a single pump system. Using CSV controls, these pumps should last a long time, which is what really saves the most energy. The savings for using a two-pump system is $311.00 per year or $25.92 per month.

1029
Applications / Pumps in Parallel
« on: November 05, 2014, 04:50:36 PM »



 500 GPM and Multi-pump Video
http://www.cyclestopvalves.com/video/csv-dsl.wmv

 Pumps in parallel can be tricky to control. As the flow is reduced, whichever pump builds the most head is doing the entire job while the other pump or pumps are being deadheaded. Each pump is having to buck the pressure of all the other pump. If each pump has it’s own Cycle Stop Valve, each pump is only bucking it’s own back pressure, not that of the other pumps. Cycle Stop Valves or CSV’s can never completely close. The seat is designed to allow 5 GPM to pass, even when the valve is in the closed position. This keeps the pump cool without the need for a recirculation line. Since the valve never completely closes, it is also designed to react almost instantaneously. This high-speed reaction, would not be possible with fully closing type valves, without causing water hammer or transients.

 When maintaining a constant head or pressure by throttling a constant speed pump, the energy used by most pumps is almost identical to the energy used when the pump is slowed with a VFD.

 There are several ways to set up controls for multiple pumps. My favorite would be to stagger the pressures so that the smallest pump runs first and the largest last. Say for instance you require a minimum of 60 PSI. I would set the largest pump as pump 3 and have it come on at 60 and go off at 65 with a standard pressure switch. Pump 2 would come on 65 and off at 70. While pump #1 would come on at 70 and only go off at 75 if the demand ever got lower than 5 GPM. Each pump would have it’s own CSV, which would be set to hold a downstream pressure the same as that particular pump started.

 With across the line starters, when the demand increases, these pumps will instantly come on and instantly supply the correct amount of water needed. The demand is instantly met with the correct increase in supply. When the demand decreases, the CSV instantly reduces flow to match the new demand. If the system pressure increases by 5 PSI, the lower pressure pump is shut down as it is no longer needed.

 All this is done while each pump is guaranteed a minimum of 5 GPM for cooling purposes. I have systems with more than 10 pumps in parallel that are controlled this way and do not produce pressure transients on start up or shut down.


Multiple Pumps in Parallel

 Cycle Stop Valves can solve the problems associated with using multiple pumps in parallel. Most of the time one of the pumps will build slightly higher pressure than the other pump or the static water level in one well is slightly higher than in the other well. This causes the pump that builds the most pressure, even if it is only 1 PSI more, to create a dead head situation for the other pump. At a low flow rate the two pumps are working against each other and the pump that builds the least pressure will be destroyed due to a lack of cooling flow. This is one reason we do not recommend using a single Cycle Stop Valve for two or more pumps unless only one of the pumps is operated at any given time.

 When a Cycle Stop Valve is placed on the discharge of each pump before the lines manifold together, backpressure from the second pump does not affect the first pump. Each pump is then working against it's own backpressure. The non-closing feature of the Cycle Stop Valve insures a minimum flow to keep each pump cool, because the backpressure or inlet pressure to the Cycle Stop Valve is higher than the outlet or system pressure.

 Multiple pumps can be the most efficient way of supplying water. Systems with a wide variation in flow can benefit greatly from being able to utilize the pump or pumps that can best meet the particular flow required. Using a Cycle Stop Valve on each pump allows multiple pumps to operate in parallel safely and efficiently. The following are examples of how Cycle Stop Valves can control different type of multiple pump systems.

 Some systems use multiple pumps that are sitting side by side and pumping from the same water source to a common system. Other systems may use multiple pumps located in different locations and pumping from different water sources to a common system. Each pump needs it's own Cycle Stop Valve, check valve, and pressure switch. If the pumps are located in different locations, a small pressure tank is needed for each pump. If the pumps are located together they can use a single pressure tank plumbed to the common discharge of all Cycle Stop Valves. All of the pressure switches should be in a manifold together with the small line that enters the pressure tank. Once installed in this way the only connection between the pumps is that they pump into a common manifold and run on staggered pressure settings.

 For this example we will use a three pump system having a small, medium, and a large pump. A minimum of 40 PSI is required at all times and the large pump is set to come on at 40 PSI and off at 50 PSI. The medium pump comes on at 50 PSI and off at 60 PSI. The small pump will come on at 60 PSI and if the system flow ever gets below 5 GPM this pump will shut off at 70 PSI. Usually these large systems have more than 5 GPM leaking so the small pump will run continuously and it's Cycle Stop Valve will hold the system at a constant 60 PSI. The Cycle Stop Valves on multiple pump systems should be adjusted to hold pressure constant at the same pressure as its' pump starts.

 When flow increases and the small pump is no longer able to keep up, the pressure will drop from 60 PSI to 50 PSI and the medium pump is started. The Cycle Stop Valve on this pump maintains 50 PSI until flow increases beyond the capabilities of the first two pumps. The pressure then drops to 40 PSI and the large pump is started. The Cycle Stop Valve on the large pump will keep the system pressure at 40 PSI as long as the amount of water needed can be produced by the three pumps. When the system flow is decreased to a point that can be supplied by the small and medium pump, the Cycle Stop Valve on the medium pump will bring the pressure up to 50 PSI and the large pump is shut off. If the system flow continues to decrease to a point that can be supplied by the small pump, the Cycle Stop Valve on the small pump will bring the pressure up to 60 PSI and the medium pump is also shut off. The Cycle Stop Valve on the small pump will maintain 60 PSI supplying the leaks and small demands in the system. Only if there is zero flow will the Cycle Stop Valve on the small pump allow the system to increase to 70 PSI and the small pump is shut off. A pressure relief valve set at 75 PSI can be used for a safety. The largest pump runs at the lowest pressure of 40 PSI, therefore the tank should be precharged with air to 35 PSI.

 These pumps can be sitting side by side or they can be miles apart. The staggered pressure settings make all pumps work together when needed. There is no need for wires or radio controls between pumps. Even pumps that are miles from each other operate on system pressure only. If the pump that is running cannot keep up with the demand, the system pressure drops slightly and the next pump required is started by its' own pressure switch. As demand decreases, system pressure increases and pumps that are no longer needed are shut down by there own pressure switch. Cycle Stop Valves allow simple, safe, and efficient use of multiple pumps in parallel.

1030
Applications / Multiple Pressure Settings from a Single Pump System
« on: November 05, 2014, 04:46:49 PM »
 Using a Cycle Stop Valve, a pump or a pumping station can be designed to hold a single constant pressure. In some systems different pressure are required throughout different areas. The pump or station should be designed to operate at the highest pressure required in the system. Anywhere in the system that a line with a lower pressure is required a simple pressure-reducing valve can be used.

 An example would be a pit mine where the pump station at the bottom might be required to produce 200 PSI. Only 40 PSI may be left for the sprinklers used to wet down the highest road in the pit. On the lower roads the pressure increases as the elevation decreases. The water line at the lowest road is close to the pump station and sees 200 PSI. A simple pressure-reducing valve should be used at each of the taps on the way out of the pit. These pressure-reducing valves on the water lines at each level can be set at 40 PSI. Each level now has a steady 40 PSI from top to bottom of the pit.

 Another example would be a golf course that needs 120 PSI for the main irrigation sprinklers, 50 PSI for the lines at the club house, and 10 PSI for the drip system irrigating the trees on the border. The main pump station is set up for the 120 PSI. The line is tapped at the clubhouse and a pressure-reducing valve is installed, and set at 50 PSI. The 120 PSI line is tapped again over by the trees and another pressure reducing valve delivers 10 PSI to the drip system.

 Another example would be an irrigation system that uses up to 1,000 GPM at 50 PSI for pop up sprinklers. A small section that needs irrigating is on top of a hill. This section only requires 100 GPM but needs an extra 50 PSI to reach the top of the hill. A small booster pump can be tapped into the main irrigation line going up the hill. This 100 GPM booster pump picks up water from the first pump at 50 PSI and boost it to 100 PSI. This booster would come on at 100 PSI and the Cycle Stop Valve would maintain this 100 PSI with flows from 5 GPM to 100 GPM. When there is zero flow on top of the hill the Cycle Stop Valve on the booster pump allows a small tank to fill to 110 PSI and the booster is shut off. Other small boosters can be added anywhere in the system they are needed. This type system allows the main pump to run at the low pressure that is needed for the majority of the irrigation. When the irrigation is needed at the top of the hill only a small portion of the main flow must be boosted to a higher pressure.

1031
Applications / Multiple Pumps in Different Locations with Cycle Stop Valves
« on: November 05, 2014, 04:45:59 PM »
 500 GPM and Multi-pump Video
http://www.cyclestopvalves.com/video/csv-dsl.wmv

 Systems with two or more pumps in different locations can be controlled with Cycle Stop Valves. These are ways of controlling multiple pumps that can be done at the pump locations with a simple pressure switch. There are no wires or radios connecting these pumps together. When the system requires more flow, more pumps come on to supply the need. As flow in the system decreases, pumps go off when they are no longer needed.

#1
 An example would be multiple pumps in different location and pumping into a common distribution system. In these systems each pump must have it's own Cycle Stop Valve, check valve, pressure switch, and small pressure tank. The pressure settings can be 5 PSI to 10 PSI between pumps. Adjustments for elevation differences must be made. If one of the pumps is 23' in elevation below another pump, the lower pump will read 10 PSI higher than the other pump. If the lower pump is required to operate the system at 50 PSI, the setting at the pump would be 60 PSI. The opposite would apply for a pump that is higher in elevation than another.

 If there are no differences in elevation of the pumps on the system, pressure can be adjusted as follows. Requiring 50 PSI minimum to operate the system the largest pump is set to come on at 50 PSI. That pumps Cycle Stop Valve it set to maintain the 50 PSI and the pressure switch shuts the pump off at 55 PSI. The next smaller pump, which is a mile from the larger pump, is set to come on and the Cycle Stop Valve maintains 55 PSI. When the system pressure increases to 60 PSI this pump is shut off. A third and smaller pump still a distance from the other two pumps set to start at 60 PSI and go off at 65 PSI.

 Pressured up to 65 PSI the system is shut off. When water is used anywhere in the system, the pressure drops to 60 PSI starting the smallest pump. The Cycle Stop Valve on the smallest pump is set to maintain 60 PSI. As long as there is 5 GPM being used in the system its' Cycle Stop Valve holds at a steady 60 PSI. When usage in the system increases beyond the capability of the small pump, pressure will decrease to 55 PSI and the second or medium size pump is started. As long as these two pumps can supply the demand, pressure remains at 55 PSI. When more water is required the pressure will drop to 50 PSI starting the third pump. With all three pumps running pressure will remain at 50 PSI as long as demand stays within the combined output of the three pumps.

 When the demand decreases to a flow that can be produced by the two smaller pumps, pressure increases to 55 PSI and the third pump is shut off. Decreasing demand until the smallest pump can supply the flow will increase pressure to 60 PSI, which shuts off the second pump. If flow can be reduced to zero demand the small pump will slowly fill the system to 65 PSI and the last pump is shut off.

#2
 Many pumps can be brought on using 5 PSI to 10 PSI between pumps. When there are even more pumps in the system two ways of setting the pressures are possible. One way is for each pump to have only 3 PSI between on and off. For every 3 PSI drop in the system pressure another pump is started. Pumps can also be brought on in groups. Every time the system pressure drops 5 PSI a group of three or five pumps is started. These two ways of control will work with systems that have ten, twenty, or even more pumps.

1032
Applications / 44 Gallon Tank Supplies 138 Mobile Homes
« on: November 05, 2014, 04:44:54 PM »
A state inspection was made on the old system. The water operator was informed that due to low pressure during peak demands, he needed to install larger booster pumps than the two 3 HP pumps he had.

 The cycling was bad with the old 3 HP pumps and 3,000 gallons of pressure tank, cycling would be worse with larger pumps. To stay within acceptable run times with the new 7.5 HP pumps a 10,000 gallon tank was needed. Prices ranged from $20,000 to $35,000. Add the price of the pumps, everyday expenses, and it might as well have been a million dollars. There is no way to sell enough water to 138 mobile homes to justify that kind of expenditure.

 The water operator was not the kind to give up easily. He began to look for alternatives. He soon learned that Cycle Stop Valves and variable speed pumps both claimed to be able to do the job with out the big pressure tank. Comparing the two options, the water operator determined that the variable speed pumps have complicated electronics and were still out of his budget. The Cycle Stop Valve was simple, inexpensive, and claimed to work with only a 44 gallon tank.

 Confronting the state officials, the water operator was informed that the 10,000 gallon tank, engineered with a compressor and all the accessories was the only approved method. He tried for a grant. He was stunned to find out that there were hundreds of water systems that were in worse shape than this one. All of them were trying for a grant to purchase an approved pressure tank or water tower. The water operator could afford to put in the larger pumps and even the Cycle Stop Valves. But, if the 10,000 gallon tank was mandatory, the state would have to buy it when they took over after the bankruptcy.

 Well, seven years have passed since the installation of the larger pumps with Cycle Stop Valves and a 44 gallon tank. What does the water operator have to say? "I can't believe the way these Cycle Stop Valves work. I just had to change my way of thinking. I was used to hearing the old pumps cycle on and off all the time. It seemed strange to come into the pump house and here a pump running all the time. Since installation the primary pump has been running 24 hours a day. The Cycle Stop Valve has held the pressure at exactly 55 PSI all this time. The flow rate in the park can vary from as little as 5 GPM to as much as 400 GPM and the pump, or pumps if needed, just keep on running supplying exactly the same amount of water as the customers are using. With the old system the pressure was always changing, 40 to 60, 60 to 40, 40 to 60, continuously. One major complaint was that the sprinklers would just barely work for a while, then they would shoot all the way into the neighbors yard at other times. The steady 55 PSI supplied by the Cycle Stop Valve has fixed that problem. I was also worried that a 7.5 HP pump running all the time would cause my electric bill to go up. Last year I mostly had one 3 HP pump running, sometimes on, sometimes off. Now I have over twice as large a pump (7.5HP) running 24 hours a day but, my electric bill hasn't increased at all. I have had absolutely no complaints from my tenants or the state about low pressure this year. The constant pressure has also eliminated the leaks. I didn't realize that a pump kicking off and on all the time was causing all those leaks. The Cycle Stop Valves have saved me lots of digging and repair expenses. Bottom line is that I can't believe anyone would use any other type system. I realize now that big pressure tanks and water towers are a waste of money. I'm glad I didn't listen to those who told me it couldn't be done. With Cycle Stop Valves, one 44 gallon tank can supply 138 mobile homes."

1033
Applications / High Rise Buildings and Multiple Boosters in Series
« on: November 05, 2014, 04:43:53 PM »
 Link to Drawing
http://www.cyclestopvalves.com/forum/viewtopic.php?t=124

 Cycle Stop Valves can control booster systems that pump from a low elevation to a higher elevation. When boosting pressure to a higher elevation, simply pick up the water at a point where the pressure is low and boost it to a higher pressure.

Example #1
 A single booster system can be used up to 400 PSI of operating pressure from special designed Cycle Stop Valves. Every floor on the way up the building or mountain can have a pressure-reducing valve set at 40 PSI. This insures that all water usage is at 40 PSI even though the system builds 400 PSI to get 40 PSI to the top floor.

Example #2
 An example would be a high rise building with a need for 40 PSI on every floor. Start in the basement with a pump that will boost incoming water to 100 PSI. If 40 PSI is the minimum pressure acceptable at any point in the system then move up to a point 138' in elevation higher than the last booster pump and install another booster system. The second booster system picks up the water at 40 PSI and boost it to 100 PSI again. This process can be repeated over and over again until the uppermost part or floor in the system has 40 PSI. Each floor or level tapped into the pipe system on the way up can be equipped with a pressure-reducing valve set at 40 PSI. This insures that every floor or level has 40 PSI and that none of the pipe system ever sees more than 110 PSI.

 When there is a demand for water on any floor, the booster pump below that floor comes on at 100 PSI and the attached Cycle Stop Valve tries to maintain this 100 PSI constant. Each booster pump below the first, sees the booster pump above as a demand, the same as from one of the floors on its' level. Each booster pump below the usage comes on in turn to feed the booster system above.

 If there is zero usage the Cycle Stop Valve on that booster pump would allow a small pressure tank to fill at 5 GPM until the pressure rose to 110 PSI and the pressure switch would shut off the pump. When any booster pump shuts off, the booster pump below sees no demand and its Cycle Stop Valve, allows its small pressure tank to fill to 110 PSI and that pump is shut off. All the booster pumps on the way down continue to fill tanks until all are shut off.

 In the case of a high rise building the booster pumps would get progressively smaller on the way up as demand decreases. In some cases the building may be large enough that there is never a zero flow condition. One pump in each booster system should be sized to be efficient at very low flow, as it will run continuously. Another pump in each booster station should be sized to handle peak demands. Booster stations with multiple pumps are more efficient and will keep considerable wear off of the larger pumps.

Example #3
 Another example would be boosting water over a mountain. A booster station at the bottom of the mountain can boost pressure as high as the pipeline up the mountain can handle. We could boost to 180 PSI and maybe use 200# pipe. Wanting 20 PSI to feed the booster station at the next higher elevation we would go up 160 PSI or 370' in elevation and install another booster. This second booster would pick up water at 20 PSI and boost to 180 PSI again. The next booster would be another 370' above the last booster and the process could be repeated as many times as needed. This will allow all of the booster systems and the entire pipeline to operate at less than 200 PSI, even though it would have taken 1,000 PSI (and pipe that could handle it) to pump to the top of the mountain with a single booster station.

 Each booster pump would come on at 180 PSI, the Cycle Stop Valve would be set to maintain 180 PSI, and the pump would be shut off at 190 PSI. When water is demanded at the top of the mountain the small pressure tank on the highest booster station would drain as pressure lowered from 190 PSI to 180 PSI and the pump will be started. The small pressure tank at the second lowest booster station would drain from 190 PSI to 180 PSI and the pump will be started. This process is repeated all the way down the mountain. Each booster stations comes on to feed the booster station above it. The Cycle Stop Valve on the uppermost booster pump will maintain 180 PSI matching the flow being used at the top of the mountain. The Cycle Stop Valves on the other booster pumps will maintain 180 PSI matching the flow required by the next booster station above.

 When the flow at the top of the mountain is stopped, the Cycle Stop Valve on the uppermost booster pump allows the small pressure tank to fill at 5 GPM. The pressure slowly rises to 190 PSI and the pressure switch shuts off the pump. The Cycle Stop Valve on the next lower booster pump allows its' pressure tank to slowly fill to 190 PSI and the pump is shut off. This process is repeated all the way down the mountain until all booster pumps have been turned off.

 These type systems are fully automatic using simple pressure switches. No wires or telemetry is needed to operate the system. The pumps and the piping are all operating at less than 200 PSI for a 1,000 PSI system. The pipe system can be tapped for use anywhere along the system between the booster pumps. The system horsepower required should be the same with five 20 HP booster systems instead of one 100 HP system. The electrical demand charge will be considerably less starting five 20 HP pumps at slightly different times, verses starting a single 100 HP pump.

 There are many variations possible on the above examples. When flow required varies widely, having different size pumps at each booster station will be the most efficient. Low suction pressure cut-off switches are always important when one booster system directly feeds another. Air vents and vac should be used in needed locations. Pressure relief valves should be used in appropriate locations and set slightly above the pressure switch shut off point. All types of electronic monitoring and control systems can be used if needed. However, when using Cycle Stop Valves and pressure relief valves, all pumps can be turned on manually to continue the supply of water even when all the electronic controls have shut down.

1034
Applications / Bypassing a Water Tower
« on: November 05, 2014, 04:42:09 PM »


 When the time comes for repair on your elevated tank or hydro tank, Cycle Stop Valves can keep a “constant pressure” on the city while the tank or tower is out of service.

 Attaching a Cycle Stop Valve to the discharge of a pump or enough pumps to keep up with the peak demands will insure that the system will also work at 3 AM when there is very little demand. A Cycle Stop Valve will vary the output of a pump to match the required demand by maintaining a “constant pressure” on the distribution system. If demand increases, requiring a second pump, 10 PSI drop in system pressure triggers the second pump to start. With the first pump already at its maximum flow, the Cycle Stop Valve on the second pump restricts this pump to produce only the extra flow needed. When demand decreases and the first pump is again able to handle the demand, the Cycle Stop Valve on the first pump will bring the system pressure up 10 PSI triggering the second pump to shut off.

 The first pump on line should be a small pump. This pump should be able to handle times of low demand and system leaks efficiently. The second pump should be larger, and combined with the first pump should be able to handle peak demands. Even more pumps can be brought on line if needed, and a back up generator can even insure fire protection during power outages.

 The pump or pumps will continuously supply demand at exactly the same rate as the usage. It is important to have enough water in ground storage to supply the demand as needed.

 When placing a tower back on line the Cycle Stop Valve can also maintain a “constant level” in the tower. A Cycle Stop Valve setting of 50 PSI will maintain a level in a tower if 115' regardless of the flow rate used from the tower. Maintaining a level in a tower can also eliminate line breaks usually associated with starting and stopping flow or pumps.

 (See also "Replace Big Hydro Tanks with CSV and Small Tank" or "Alternatives to Water Towers and Hydro Tanks")

 Link to Drawing
http://www.cyclestopvalves.com/forum/viewtopic.php?t=141

1035
Applications / Pump Start Relays and Cycle Stop Valves
« on: November 05, 2014, 04:41:22 PM »
Irrigation systems with pump start relays can utilize Cycle Stop Valves to vary flow rates to different size zones. Pressure on the irrigation system will remain constant throughout the entire range of the pump. Zones can be matched to the needs of the irrigation and not the pump. This eliminates doubling up on zones when a single small zone is all that is needed.

When used with a pump start relay and in combination with a pressure relief valve the Cycle Stop Valve eliminates the possibility of destroying a pump from deadheading. Many times a pump start relay will start the pump even though varmints or trenching has destroyed the wires going to the zone valves and the sprinklers do not pop up. Set at 60 PSI the internal bypass in the Cycle Stop Valve will allow the pressure to increase to 70 PSI and the pressure relief will dump enough water to keep the pump from overheating.

One of the advantages of pump start relays is that irrigation systems can be made to drain out when not being used to prevent freezing. This can also be a disadvantage in that the system must be refilled to be used. Refilling the system can cause high velocities and water hammer, which can be hard on the irrigation system.

Using a Cycle Stop Valve with a small pressure tank and a pressure switch can have some advantages over using a pump start relay. With the pressure switch and tank the entire system stays pressurized. This eliminates water hammer and high velocities, which can occur from non-pressurized systems such as with the pump start relay. The pressure tank and switch will also allow automatic operation of the pump for using quick connectors, hose bibbs, and garden hoses.

Using Cycle Stop Valves with either a pump start relay or a pressure tank will maintain a constant pressure with any size irrigation zone. This allows precise irrigation and helps preserve our water supplies.

Pages: 1 ... 67 68 [69] 70 71 ... 104