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M-Series Low-Flow Pressure Relief Valves
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Griffco M-Series diaphragm low-flow pressure relief valves are pump system valves designed to protect chemical feed systems from over pressure damage caused by defective equipment or a blockage in the chemical feed line. Robust construction ensures reliability in the rigorous service of municipal and industrial applications. Also known as bypass valves.
M-Series Low-Flow Back Pressure Valves
M-Series Low-Flow Pressure Relief Valves

Valve Features

  • 2-port, 3-port, and 90° configurations
  • Solid, robust, machined construction
  • 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 350 psi (24 bar)
  • 4 optional pressure ratings (springs)
  • Valve sizes from 1/4" to 1/2" or DN 8 to DN 15
  • 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

  • 1/4" to 1/2" or DN 8 to DN 15

Wetted Materials

  • PVC
  • CPVC
  • Polypropylene
  • PVDF
  • PTFE

 

  • Halar®
  • 316 SS
  • Alloy 20
  • Hastelloy® C

M-Series PRM - Data Sheets

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

M-Series PRM - IOM Manuals

TitleDescriptionDate modifiedDownload
IOM Manual PRM (US) Imperial09-14-2020 Download
IOM Manual PRM (Spanish) Metric09-14-2020 Download

M-Series PRM - Dimensional Drawings

M-Series 3-Port @ 180° (1/4" - 1/2") (DN 8 - DN 15)

TitleDescriptionDate modifiedDownload
Dim PRM 3Port@180 Threaded US 1/4" - 1/2"08-24-2020 Download
Dim PRM 3Port@180 Threaded Metric DN 8 - DN 1508-24-2020 Download
Dim PRM 3Port@180 Socket US 1/4" - 1/2"08-24-2020 Download
Dim PRM 3Port@180 Socket Metric DN 8 - DN 1508-24-2020 Download
Dim PRMU 3Port@180 Union US 1/4" - 1/2"08-24-2020 Download
Dim PRMU 3Port@180 Union Metric DN 8 - DN 1508-24-2020 Download

M-Series 2-Port @ 180° (1/4" - 1/2") (DN 8 - DN 15)

TitleDescriptionDate modifiedDownload
Dim PRM2 2Port@180 Threaded US 1/4" - 1/2"08-24-2020 Download
Dim PRM2 2Port@180 Threaded Metric DN 8 - DN 1508-24-2020 Download
Dim PRM2 2Port@180 Socket US 1/4" - 1/2"08-24-2020 Download
Dim PRM2 2Port@180 Socket Metric DN 8 - DN 1508-24-2020 Download
Dim BPMF 2Port@180 Flanged US 1/4" - 1/2"08-24-2020 Download
Dim BPMF 2Port@180 Flanged Metric DN 8 - DN 1508-24-2020 Download
Dim BPMU 2Port@180 Union US 1/4" - 1/2"08-24-2020 Download
Dim BPMU 2Port@180 Union Metric DN 8 - DN 1508-24-2020 Download

M-Series 2-Port @ 90° (1/4" - 1/2") (DN 8 - DN 15)

TitleDescriptionDate modifiedDownload
Dim PRM290 2Port@90 Threaded US 1/4" - 1/2"08-24-2020 Download
Dim PRM290 2Port@90 Threaded Metric DN 8 - DN 1508-24-2020 Download
Dim PRM2F90 2Port@90 Flanged US 1/4" - 1/2"08-24-2020 Download
Dim PRM2F90 2Port@90 Flanged Metric DN 8 - DN 1508-24-2020 Download

M-Series PRM - Sectional Drawings

TitleDescriptionDate modifiedDownload
M001 08-26-2020 Download

3D CAD Drawings Now Available

Three-dimensional CAD drawings are now available for you to download and use in your pumping system designs.

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