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T-Series Pressure Relief Valves
Griffco high flow diaphragm pressure relief valves are designed to protect chemical transfer systems from over pressure damage caused by defective equipment or a blockage in the chemical line.
Large orifice sizes facilitate high flows and high viscosity.
Wetted materials include PVC, CPVC, PP, PVDF, PTFE, 316SS, A20 and Hast. C.
Available sizes: 1/2" , 3/4, and 1".
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Features:
- High Reliability / Low Cost
- No Bolts on Plastic Models
- Compact Size for OEM Applications
- Adjustable 10 - 150 PSI
- Optional 350 PSI Rated Valve
- 3 Port, 2 Port, & 90° Configuration
- Robust, Machined Construction
- Vulcanised PTFE/EPDM Diaphragm
- Wide Range of Materials
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Operation:
Griffco diaphragm pressure relief valves operate when the pressure in the chemical 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 chemical flows out the relief port, back to the chemical tank or to the suction side of the pump. The valves
are pre-set at 50 psi, however they are field adjustable from 10 - 150 psi, (optional 350 psi) via the adjustment screw. The relief valve should be set approximately 15 psi higher than the system pressure. Installation should be made as close to the pump as possible, without any valves or accessories between the relief valve and the pump. Consult your pump manufacturer for his recommendations.
Technical Data:
Sizes:
Model PRT
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¼", 3/8", ½"
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| Connections: |
NPT and Socket (3 port, 2 port & 90° Configuration) |
| Pressure Adjustment |
10 - 50 psi, 10 - 150 psi, 50 - 350 psi |
| Flow Rates @ 150 psi |
Shipping Weight: lbs |
| Size |
Pulsating |
Continuous |
Plastic |
Metal / Plastic Top |
Metal / Metal Top |
1/4"
3/8"
1/2"
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100 USgph
200 USgph
300 USgph
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5 USgpm
10 USgpm
15 USgpm
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1.0
1.0
1.0
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2.5
2.5
3.0
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3.0
3.0
3.5
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| Max Temperature: (°F) |
Plastic: 140° ; Metal: 300° (Peak Short Term 390°) |
| Materials of Construction: |
| Diaphragm |
PTFE / EPDM, Optional: Viton & PTFE / Viton |
| Valve Top |
Standard: PVC (Threaded to Plastic Valves, Bolted to Metal Valves)
Optional: CPVC, Steel, 316 SS, Others on Request (Alloy tops fit alloy valves ONLY) |
| Valve Body |
PVC, CPVC, PP, PTFE, PVDF, 316 SS, A 20, Hast. C, Others on Request |
Dimensions:
| D |
A |
B |
C |
| 1/4" |
3.90 |
2.375 |
0.75 |
| 3/8" |
3.90 |
2.375 |
0.75 |
| 1/2" |
4.60 |
2.375 |
1.10 |
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Performance Curves:
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