Messages

1

Pumps, Wells, Tanks, Controls / Re: pump curve selection for STA-RITE

« on: April 19, 2011, 09:55:28 PM »

Hi Cary,

I tried searching for the performance curve for the model 10PE402H and could find nothing.  The only thing remotely close was a PE series centrifugal pump.  I found HS series and J series submersibles???

http://www.sta-rite.com/ResidentialSearchResults.aspx#ProductType=4%22+Submersible

Am I looking at the right thing? Do you maybe have a link to something for me?  Sorry for not knowing much about this yet...

2

Pumps, Wells, Tanks, Controls / Re: pump curve selection for STA-RITE

« on: April 19, 2011, 02:03:50 PM »

I have no control over the pump installer.  I may have some control over the pump selection.

The pump installer stated that the normal pumps weren't meant to run at real low flow rates at the higher pressure that a cycle stop valve would cause as it regulated the outlet pressure to 50psi.  They recommend a VFD for the low flow application.  (While the max output might be 10GPM, I might be trickle watering (so the ground has time to accept the water flow) a tree in the yard at .5GPM for 1/2 hour (with many trees meaning about 6 hours continuous @ .5GPM)

I work for a company that sells VFD for a living (I use them in all kinds of industrial applications) so know all about their advantages, but from an initial cost point of view, and return on investment, it seems like the cycle stop valve would be a much better solution for me at this point in time.

As far as a Franklin or Grundfos motor, which models of those would you recommend?  I know only enough about pump curves to compare what motor they suggest vs what you recommend, so can hopefully get them to supply a pump with a curve that you feel will work well with the cycle stop valve.

By the way, do you see any issue with using a cycle stop valve for 6 hours at .5GPM on a standard pump or does this actually put me into a VFD situation?  They stated that there is a sweet spot they design their pump selection to.

Appreciate your help by the way...

3

Pumps, Wells, Tanks, Controls / pump curve selection for STA-RITE

« on: April 19, 2011, 07:05:08 AM »

Hi,

I am having a new house built and have a well driller who based on the area expects to dig 200' down into the ground and produce 12-15GPM.  The people they use to install the pump and stuff want nothing to do with a cycle stop valve.  Thus I will have to add it after we move in.  They use STA-RITE pump motors.

Based on past conversations with you, and reading your website, you need to get a pump with the proper performance curve.  As far as I can tell, they plan on using a 1HP, 10GPM 4" submersible pump for the water load of the house based on the plumber's (a 3rd party not associated with the driller or well pump vendor) calculations.  If that ends up being the case, what would be your recommended STA-RITE submersible pump to be used with a CSV1Z?  I will have a tankless water heater and read that they work best with constant pressure as opposed to the 40-60psi cycling.

Thanks