Griffco High-Flow Pressure Relief Valves


griffco high-flow series, pressure relief valves, diaphragm pressure valves, griffco

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.

Wetted Materials:

  • PVC

  • CPVC

  • PP

  • PVDF

  • PTFE

  • 316 SS

  • Alloy 20

  • Hastelloy® C

Available Sizes:

1/2", 3/4" & 1" or DN 15, DN 20 & DN 25

Features & Benefits:

  • Higher flow / lower pressure drop

  • High reliability at a low cost

  • Large orifice for high-viscosity fluids

  • 2-port design

  • Vent-able to suction line

  • Solid, robust, machined construction

  • Wide range of materials

  • Flanged and socket connection options

  • Molded Noryl top with integral hardware locking

  • Composite PTFE/EPDM diaphragm

  • Multiple diaphragm material options

  • Long diaphragm life

  • Adjustable up to 150 psi (10 bar)

  • Valve sizes from 1/2" to 1" or DN 15 to DN 25

  • Tamper-resistant adjustment screw

  • High-temperature option up to 300ºF (149ºC)

Download Technical Data Sheet: Imperial (US) | Metric (International)

Sizes, Flow Capacities & Pressure Ratings
Size Maximum Flow Maximum Pressure
Pulsating Continuous
Inch Metric GPH LPM GPM LPM PSI BAR
1/2" DN 15 600 2,271 30 114 250 17
3/4" DN 20 600 2,271 30 114 250 17
1" DN 25 1,000 3,785 54 204 250 17

 


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