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High-Flow back pressure and pressure relief valves

Griffco High-Flow diaphragm back pressure valves are designed to enhance the performance of chemical feed systems by applying a continuous back pressure to the chemical feed pump, while also acting as an anti-syphon valve. The robust construction guarantees a continious reliability at heavy duty performances.
Larger orifice size makes the valves ideal for use with higher viscosity fluids.

 

Liquid contact materials:

  • PVC
  • CPVC
  • PP
  • PVDF
  • PTFE
  • SS 316L
  • Alloy 20
  • Hastelloy® C

Available sizes:

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

Features and benefits:

  • High reliability at an affordable price
  • Anti-syphon function
  • Solid, robust, (machined) construction
  • Wide range of materials
  • Flanged-, union-, threaded-, and weld/glue connections
  • Injection moulded Noryl top with integrated pressure lock
  • RVS 316L metall body and top-options
  • Moulded PTFE / EPDM-diaphragm
  • Several materialoptions for diaphragms
  • Long lifetime diaphragm
  • Adjustable up to 17 bar
  • 4 optional pressure ranges (springs)
  • Connection sizes from 1/2“ up to 1” or DN 15 up to DN 25
  • Tamper proof set screw
  • High temperature option up to 150 ° C
  • Factory adjusted pressure or field adjustable
Sizes, flowrange and pressure classifications
Size Max Flow Max pressure
Pulsing Continiously
Inch Metric GPH LPH 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
Pressure relief valves
Pressure relief valves