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High-Flow Pressure Relief Valves
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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.
High-Flow Pressure Relief Valves

Valve Features

  • Higher flow / lower pressure drop
  • Large orifice for high-viscosity fluids
  • 2-port design
  • Vent-able 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 affordable price
  • Long diaphragm life
  • Wide range of valve materials
  • Multiple diaphragm material options

Available Sizes

  • 1/2", 3/4", 1", 1 1/2", & 2" or DN 15, DN 20, DN 25, DN 40 & DN 50

Wetted Materials

  • PVC
  • CPVC
  • Polypropylene
  • PVDF

 

  • PTFE
  • 316L SS
  • Alloy 20
  • Hastelloy® C

High Flow PRHF - Specifications

High Flow PRHF - Data Sheets

TitleDescriptionDate modifiedDownload
Data Sheet PRHF (US) Imperial09-14-2020 Download
Data Sheet PRHF (Intl) Metric09-14-2020 Download
Data Sheet PRHF (Spanish) Metric09-14-2020 Download

High Flow PRHF - IOM Manuals

TitleDescriptionDate modifiedDownload
IOM Manual PRHF (US) Imperial09-14-2020 Download

High Flow PRHF - Dimensional Drawings

High-Flow 2-Port @ 180° (1/2" - 3/4") (DN 15 - DN 20)

TitleDescriptionDate modifiedDownload
Dim PRHF 2Port@180 Threaded US 1/2" - 3/4"08-24-2020 Download
Dim PRHF 2Port@180 Threaded Metric DN 15 - DN 2008-24-2020 Download
Dim PRHF 2Port@180 Socket US 1/2" - 3/4"08-24-2020 Download
Dim PRHF 2Port@180 Socket Metric DN 15 - DN 2008-24-2020 Download
Dim PRHFF 2Port@180 Flanged Metric DN 15 - DN 2008-24-2020 Download

High-Flow 2-Port @ 180° (1") (DN 25)

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