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High-Pressure Backpressure-, and pressure relief valves

Griffco diaphragm high-pressure back pressure valves and diaphragm high-pressure pressure relief valves are designed to enhance the performance of chemical (dosing) pump systems by applying a continuous back pressure to the chemical feed pump, while also acting as an anti-syphon valve. The robust construction ensures reliability in heavy-duty industrial applications, among others.

Liquid contact materials:

  • SS 316L
  • 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 and benefits

  • Pressurerange from 24 upto 275 bar
  • High reliability at an affordable price
  • Compact size for OEM applications
  • Configuration with 2 ports, 90 °
  • PVDF-plunger
  • Solid, robust, (machined) construction
  • Threaded-, or socket-connection options
  • SS316 top; standard
  • Moulded PTFE / EPDM-diaphragm
  • Several materialoptions for diaphragms
  • Long lifetime diaphragm
  • Connections from 1/4“ up to 1” or DN 8 up to DN 25
  • 4 optional pressure ranges (springs)
  • Tamper proof set screw
  • High temperature option up to 150 ° C
  • factory-set to desired pressure or field settable

 

Sizes, flowrange and pressure classifications
Size Max Flow Max pressure
Pulsing Continiously
Inch Metric GPH LPH GPM LPM PSI BAR
1/4″ DN 8 700 2,650 35 132 4,000 275
3/8″ DN 10 700 2,650 35 132 4,000 275
1/2″ DN 15 700 2,650 35 132 4,000 275
3/4″ DN 20 1,200 4,542 60 227 4,000 275
1″ DN 25 1,200 4,542 60 227 4,000 275
Pressure relief valves
Pressure relief valves