High-Flow Back Pressure Valves
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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. Larger orifice size makes the valves ideal for use with higher viscosity fluids.
High-Flow Back Pressure Valves

Valve Features

  • Anti-siphon function
  • Solid, robust, machined construction
  • Flanged, union, threaded and socket connection options
  • Molded Noryl top with integral hardware locking
  • 316L SS metal valve and top options
  • Molded PTFE/EPDM diaphragm
  • Adjustable up to 250 psi (17 bar)
  • 4 optional pressure ratings (springs)
  • 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
  • Factory or field settable

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 BPHF - Specifications

High-Flow BPHF - Data Sheets

TitleDescriptionDate modifiedDownload
Data Sheet BPHF (US) Imperial06-28-2021 Download
Data Sheet BPHF (Intl) Metric09-14-2020 Download
Data Sheet BPHF (Spanish) Metric09-14-2020 Download

High-Flow BPHF - IOM Manuals

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

High-Flow BPHF - Dimensional Drawings

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

TitleDescriptionDate modifiedDownload
Dim BPHFF 2Port@180 Flanged Metric DN 15 - DN 2008-24-2020 Download

High-Flow 2-Port @ 180° (1") (DN 25)

TitleDescriptionDate modifiedDownload
Dim BPHFF 2Port@180 Flanged Metric DN 2508-24-2020 Download
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