Depending on the hydraulic calculation software used, it can display the residual pressure on each node of the system.
By the way, ¿Wouldn't make more sense to install one 3" or 4" pilot operated PRV instead of two direct action 2½" PRVs?
The program being used is SprinkCalc, but order to find the residual pressures, do I flow 1000 gpm at the top of the stp?
Please describe the process in depth if possible, I will look into the 3"/4" CLA valve.
I agree 100% with Emmanuel, these sprinklers should be supplied through a 3 or 4" pilot operated diaphragm PRV on each floor instead of two direct acting valves. Regarding pressures, I think you have a more serious problem at hand. Either there is an error in the pressure data being used in the calculation or you have the wrong pump for a high rise application . The increase in pressure from flow to static in your calculation is extraordinary. You might be able to overcome this problem as it pertains to sprinklers because they can tolerate a wider range of pressures but these numbers indicate you cannot comply with nfpa 14 pressure requirement on the hose valves for firefighting. There is too dramatic of a difference between static and flow pressures. I do not believe you can get allowable hose pressure ranges if these hydraulic figures are correct. By the way dont forget the 3" prv drain riser and a downstream means for testing the sprinkler prvs.
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