Pressure relief valves are designed to protect pumping systems from over pressure damage caused by defective equipment or blockage in the pump system line.
Diaphragm pressure relief valves operate when the pressure in the pumping system exceeds the preset pressure of the valve. The diaphragm is held against the valve seat by an internal spring. When the preset pressure is exceeded, the diaphragm is forced up and the system fluid flows out of the relief port, back to the system fluid tank or to the suction side of the pump.
- Unique flow stabilization technology improves flow, extends service life, and eliminates valve chatter.
- Internal swiveling spring seat ensures spring force is applied evenly over the diaphragm for more consistent and complete valve closure.
- Both plastic and metal valves feature a separate ring attachment for more uniform clamping load and improved seal performance.
- Threaded connections on plastic valves eliminate the need for metal fasteners that can corrode.
- Proudly made in the USA
BODY MATERIALS: PVC, Polypropylene, CPVC, PVDF, 316L Stainless Steel; additional materials on request
VALVE TOP: PVC, CPVC, 316L Stainless Steel
DIAPHRAGM MATERIALS: PTFE, EPDM, Viton
INLET SIZES: 0.25", 0.375", 0.5", 0.75", 1", 1.5", 2"
INLET TYPES: NPT, BSP, Socket Weld, Union, 150# Flange, 300# Flange on 50-250 psi high pressure valves
SPRING PRESSURE: 5-150 psi, 5-50 psi, 5-250 psi on valves up to 1", 50-350 psi on metal valves
CERTIFICATIONS & TESTING: ATEX, NSF, ARRA, 3.1 Cert, Cert of Origin
DIMENSIONS
| Valve Dimensions |
2 Port 180° |
3 Port, 2 Port 90° |
Size
(NPT) |
B
(Dia) |
D
(Flat) |
A |
C |
A |
C |
Mini
1/4" to 1/2" |
2.47" |
2.30" |
4.24" |
0.85" |
4.49" |
1.09" |
| 1/2" to 1" |
3.47" |
3.22" |
5.47" |
1.00" |
5.72" |
1.20" |
| 1 1/2" |
4.47" |
3.92" |
8.07" |
1.38" |
n/a |
n/a |
| 2" |
5.49" |
4.88" |
9.76" |
1.75" |
n/a |
n/a |
MODEL NUMBER FORMAT
Example model number:
| Field |
Option |
| Configuration |
3 Port (PR), 2 Port 180° (PR2P), 2 Port 90° (PR90) |
| Size |
1/4" (025), 3/8" (038), 1/2" mini (049), 1/2" standard (050), 3/4" (075), 1" (100), 1 1/2" (150), 2" (200) |
| Body |
PVC (PVC), Polypropylene (PP), CPVC (CPVC), PVDF (PVDF), 316L Stainless Steel (SS) |
| Diaphragm |
PTFE (T), EPDM (E), Viton (V) |
| Inlet Type |
NPT (none), Socket Weld (SW), BSP (BSP), Union (U), 150# Flange (F), 300# Flange standard on 50-250 psi high pressure valves |
| Spring Pressure |
5-150 psi (none), 5-50 psi (L), 5-250 psi valves up to 1" (M), 50-350 psi metal valves (H) |
| Valve Top |
PVC (none), 316L Stainless Steel standard on 50-350 psi high pressure valves,
CPVC (CPVC) and 316L Stainless Steel (SS) available on request |
FLOW INFORMATION
Flow at 150 psi pressure drop across valve.
| Size |
US GPH
(Pulsating) |
US GPH
(Continuous) |
| 1/4" |
560 |
28 |
| 3/8" |
620 |
31 |
| 1/2" mini |
660 |
33 |
| 1/2" standard |
1240 |
62 |
| 3/4" |
1260 |
63 |
| 1" |
1300 |
65 |
| 1 1/2" |
3000 |
150 |
| 2" |
4300 |
215 |