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 feed chemical feed line. Large orifice sizes facilitate high flows and higher viscosity fluids.
Available Sizes
1/2″, 3/4″, 1″, 1-1/2″, & 2″ or DN 15, DN 20, DN 25, DN 40 & DN 50
High-Flow
Features
- Higher flow / lower pressure drop
- Large orifice for high-viscosity fluids
- 2-port design
- Ventable to suction line
- Solid, robust, machined construction
- Flanged and socket connection options
- Molded Noryl top with integral hardware locking
- Composite PTFE/EPDM diaphragm
- Adjustable up to 250 psi (17 bar)
- Valve sizes from 1/2″ to 2″ or DN 15 to DN 50
- Tamper-resistant adjustment screw
- High-temperature option up to 300°F (149°C)
Griffco Benefits
- High reliability at an affordable price
- Long diaphragm life
- Wide range of valve materials
- Multiple diaphragm material options
Wetted Materials
PVC
CPVC
Polypropylene
PVDF
PTFE
316L SS
Alloy 20
Hastelloy® C
| SIZE | MAXIMUM FLOW PULSATING | MAXIMUM FLOW CONTINUOUS | MAXIMUM PRESSURE |
SKU | Product | Description | Add to Project |
|---|---|---|---|
 PRHF105SFOSS | Relief Valve – 316SS 150# Flanges – 316SS Top | | |
| PRHF105SMSS | Relief Valve – 316SS (5″ Dia.) – 350 psi Spring – 316SS Top | | |
| PRHF105SOSS | Relief Valve – 316SS (5″ Dia.) – 316SS Top | | |
| PRHF105STVC | Relief Valve – 316SS – Ferrule Ends (includes gasket and tri-clamp) PTFE/Viton Diaphragm | | |
| PRHF105SV | Relief Valve – 316SS – Viton | | |
| PRHF050A | Relief Valve – A20 | | |
| PRHF050A2FOSS | Relief Valve – A20 – 250 psi Spring – 150# Flange – 316SS Top | | |
| PRHF050CP | Relief Valve – CPVC | | |
| PRHF050CP2V | Relief Valve – CPVC – 250 psi Spring – Viton | | |
| PRHF050CV | Relief Valve – Hast C – Viton | |
| TITLE | DESCRIPTION | DATE MODIFIED | DOWNLOAD |
