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.
Available Sizes
1/4″ to 1/2″ or DN 8 to DN 15
M-Series Low-Flow
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 an affordable price
- Long diaphragm life
- Wide range of valve materials
- Multiple diaphragm material options
- Factory or field settable
Wetted Materials
PVC
CPVC
Polypropylene
PVDF
PTFE
Halar®
316 SS
Alloy 20
Hastelloy® C
| SIZE | MAXIMUM FLOW PULSATING | MAXIMUM FLOW CONTINUOUS | MAXIMUM PRESSURE |
Filters Sort results
Reset Apply
Image | Product | Description | Add to Project |
|---|---|---|---|
 PRM2050STVF | Relief Valve – 316SS – PTFE/Viton – 150# Flanges | ||
PRM2050STVFOSS90 | Relief Valve – 316SS – PTFE/Viton – 150# Flanges – 316SS Top – 90 Degree | ||
PRM2050STVMSS90 | Relief Valve – 316SS – 350 psi Spring – PTFE/Viton – 90 Degree – 316SS Top | ||
PRM2050STVOSS | Relief Valve – 316SS – PTFE/Viton – 316SS Top | ||
PRM2050STVOSS90 | Relief Valve – 316SS – PTFE/Vition – 90 Degree – 316SS Top | ||
PRM2050SV | Relief Valve – 316SS – Viton | ||
PRM2050SVMSS | Relief Valve – 316SS – 350 psi Spring – Viton – 316SS Top | ||
PRM2050SVSOSS | Releif Valve – 316SS – Viton – Socket – 316SS Top | ||
PRM2050T | Relief Valve – PTFE | ||
PRM2050T1 | Relief Valve – PTFE – 50 psi Spring..Pressure Set: 20 psi |
| TITLE | DESCRIPTION | DATE MODIFIED | DOWNLOAD |
| M-Series PRM – Data Sheets | |||
| Data Sheet PRM (US) | Imperial | 09-14-2020 |  |
| Data Sheet PRM (Intl) | Metric | 09-14-2020 | |
| Data Sheet PRM (Spanish) | Metric | 09-14-2020 | |
| M-Series PRM – IOM Manuals | |||
| IOM Manual PRM (US) | Imperial | 05-21-2021 | |
| IOM Manual PRM (Spanish) | Metric | 05-21-2021 | |
| M-Series PRM – Dimensional Drawings M-Series 3-Port @ 180° (1/4″ – 1/2″) (DN 8 – DN 15) | |||
| Dim PRM 3Port@180 Threaded US | 1/4″ – 1/2″ | 08-24-2020 | |
| Dim PRM 3Port@180 Threaded Metric | DN 8 – DN 15 | 08-24-2020 | |
| Dim PRM 3Port@180 Socket US | 1/4″ – 1/2″ | 08-24-2020 | |
| Dim PRM 3Port@180 Socket Metric | DN 8 – DN 15 | 08-24-2020 | |
| Dim PRMU 3Port@180 Union US | 1/4″ – 1/2″ | 08-24-2020 | |
| Dim PRMU 3Port@180 Union Metric | DN 8 – DN 15 | 08-24-2020 | |
| M-Series PRM – Dimensional Drawings M-Series 2-Port @ 180° (1/4″ – 1/2″) (DN 8 – DN 15) | |||
| Dim PRM2 2Port@180 Threaded US | 1/4″ – 1/2″ | 08-24-2020 | |
| Dim PRM2 2Port@180 Threaded Metric | DN 20 – DN 25 | 08-24-2020 | |
| Dim PRM2 2Port@180 Socket US | 1/4″ – 1/2″ | 08-24-2020 | |
| Dim PRM2 2Port@180 Socket Metric | DN 8 – DN 15 | 08-24-2020 | |
| Dim BPMF 2Port@180 Flanged US | 1/4″ – 1/2″ | 08-24-2020 | |
| Dim BPMF 2Port@180 Flanged Metric | DN 8 – DN 15 | 08-24-2020 | |
| Dim BPMU 2Port@180 Union US | 1/4″ – 1/2″ | 08-24-2020 | |
| Dim BPMU 2Port@180 Union Metric | DN 8 – DN 15 | 08-24-2020 | |
| M-Series PRM – Dimensional Drawings M-Series 2-Port @ 90° (1/4″ – 1/2″) (DN 8 – DN 15) | |||
| Dim PRM290 2Port@90 Threaded US | 1/4″ – 1/2″ | 08-24-2020 | |
| Dim PRM290 2Port@90 Threaded Metric | DN 8 – DN 15 | 08-24-2020 | |
| Dim PRM2F90 2Port@90 Flanged US | 1/4″ – 1/2″ | 08-24-2020 | |
| Dim PRM2F90 2Port@90 Flanged Metric | DN 8 – DN 15 | 08-24-2020 | |
| M-Series PRM – Sectional Drawings | |||
| M001 | 08-26-2020 | | |