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Griffco Pressure Relief Valves - High-Pressure Models

prv high-pressure1Griffco High-Pressure diaphragm pressure relief valves are designed to protect chemical feed systems from over pressure damage caused by defective equipment or a blockage in the chemical feed chemical feed line. Robust construction ensures reliability in the rigorous service of municipal and industrial applications.

Wetted Materials:

  • 316 SS
  • Alloy 20
  • Hastelloy® C

Available Sizes:

1/4", 3/8", 1/2", 3/4" & 1" or DN 8, DN 10, DN 15, DN 20 & DN 25

Features & Benefits:

  • Pressure range 350 to 2000 psi (24 to 135 bar)
  • High reliability at a low cost
  • Compact size for OEM applications
  • 2-port, 90° configuration
  • PVDF piston
  • Solid, robust, machined construction
  • Threaded and socket connection options
  • 316 SS top standard
  • Composite PTFE/EPDM diaphragm
  • Multiple diaphragm material options
  • Long diaphragm life
  • Valve sizes from 1/4" to 1" or DN 8 to DN 25
  • 4 optional pressure ratings (springs)
  • Tamper-resistant adjustment screw
  • High-temperature option up to 300°F (149°C)
  • Factory or field settable

Download Technical Data Sheet: Imperial (US)

Sizes, Flow Capacities & Pressure Ratings
Size Maximum Flow Maximum Pressure
Pulsating Continuous
Inch Metric GPH LPH GPM LPM PSI BAR
1/4" DN 8 700 2,650 35 132 2,000 138
3/8" DN 10 700 2,650 35 132 2,000 138
1/2" DN 15 700 2,650 35 132 2,000 138
3/4" DN 20 1,200 4,542 60 227 2,000 138
1" DN 25 1,200 4,542 60 227 2,000 138