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Water Pressure Reducing Valves
PRESSURE DIFFERENTIAL (PSI) WATER CAPACITY (GPM)
PIPE SIZE FALL OFF (PSI) 25 50 75
1/2" 5 8.5 10.0 11.5
10 13.6 16.0 18.4
15 17.9 21.0 24.2
20 21.3 25.0 28.8
3/4" 5 10.6 12.5 14.4
10 20.4 24.0 27.6
15 28.1 33.0 38.0
20 34.0 40.0 46.0
1" 5 17.0 20.0 23.0
10 29.8 35.0 40.3
15 40.8 48.0 55.2
20 51.0 60.0 69.0
1 1/4" 5 21.3 25.0 28.8
10 51.9 61.0 70.2
15 80.8 95.0 109.3
20 106.3 125.0 143.8
1 1/2" 5 29.8 35.0 40.3
10 61.5 72.3 83.1
15 90.1 106.0 121.
20 13.1 133.0 153.0
2" 5 55.3 65.0 74.8
10 126.7 149.0 171.4
15 174.3 205.0 235.8
20 231.2 272.0 312.8
2 1/2" 5 58.7 69.0 79.4
10 132.6 156.0 179.4
15 200.6 236.0 271.4
20 271.2 319.0 366.9
3" 5 80.8 95.0 109.3
10 282.5 332.4 382.3
15 282.5 332.4 382.3
20 365.5 430.0 494.5
Item Description MATERIALS
1 Body (Bronze)
2 Seat (SS)
3 Seat O-Ring (Nitrile)
4 By-Pass Assembly
5 Yoke (Bronze)
6 Diaphragm (Nitrile W/Nylon
Reinforcement)
7 Diaphragm Washer (SS)
8 Diaphragm Nut (SS)
9 Spring (SS)
10 Spring Retainer (SS)
Item Description
11 Cap (Bronze)
12 Cap Bolts (SS)
13 Lock Nut (SS)
14 Adjustment Screw (SS)
15 Seat Disc Holder (Bronze)
16 Seat Disc (EPDM)
17 Seat Disc Washer (SS)
18 Seat Screw (SS)
19 Bottom Cover (Bronze)
20 Bottom Cover O-Ring (Nitrile)
21 Self-Sealing Washer (SS)
Note: Materials specified for 1/2" thru 2" only.
Note: Flow curves are based on static conditions of : Inlet pressure = 100 psig:
Outlet pressure = 50 psig. All curves are for female NPT versions only.
Pressure fall-off is the pressure by which the outlet pressure drops as flow demand is needed.
FLOW RATE
Model PRH Flow Chart
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