Messages

1

Pumps, Wells, Tanks, Controls / CSVI 10 psi?

« on: February 28, 2010, 05:55:37 PM »

Thanks for the response. You recommend a csv1 holding 10 psi. I don't see that product anywhere. The csv1 seems to be preset to 40, 50, or 60 psi. Did you mean csv1z?

2

Pumps, Wells, Tanks, Controls / 2 geothermal heat pumps, one water pump, csv

« on: February 27, 2010, 09:49:36 AM »

I have 2 Water Furnace units, both 3 ton. One is 20 years old and one is 2 years old (Envision). I have  a 1 hp pump which delivers about 12 GPM which is enough for both units. It is an open loop system. When the older unit runs by itself the water pressure is about 30 psi. When the newer unit runs by itself the water pressure is about 15 psi. When both units run the pressure is about 10 psi. If I were to put a cvs on the pump and adjust so the pressure stays at 20 psi whether any combination of 1 or 2 units running, does the csv cause the flow rate to go down. Especially, if the older water furnace unit, which is now seeing 30 psi, sees 20 psi after the csv will it be getting fewer gpm's. I hope I have explained my question clearly enough. I guess a simpler way to put it is, when using a csv to REDUCE pressure, does it also reduce the flow rate.