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Irrigation / Maximum back pressure on a CSV

« on: September 03, 2014, 10:05:24 AM »

We are designing an irrigation system for a small Pecan orchard and had a question concerning maximum back pressure on 4" well with a 5 hp pump.  The flows have been tested as the following:

GPM                  PSI
68                     0
60                     10
57                     20
54                     30
57                     40

We are needing 25 gpm @ 25 psi.  What will our back pressure be on this 5 hp pump?  Will it create any problems with checkvalves, pipes, or pumps?

We did a similar installation with a Vermad valve on a different site and blew a rubber check valve in the well supply pipe.

Thanks for your time
Randy