M-Series Low-Flow Pressure Relief Valves
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 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
| Size | Maximum Flow | Maximum Pressure | |||||
| Pulsating | Continuous | ||||||
| Inch | Metric | GPH | LPH | GPM | LPM | PSI | BAR |
| 1/4" | DN 8 | 100 | 375 | 5 | 19 | 350 | 24 |
| 3/8" | DN 10 | 200 | 757 | 10 | 37 | 350 | 24 |
| 1/2" | DN 15 | 300 | 1135 | 15 | 57 | 350 | 24 |
M-Series PRM - Data Sheets
| Title | Description | Date modified | Download |
|---|---|---|---|
| Data Sheet PRM (US) | Imperial | 09-14-2020 | Download |
| Data Sheet PRM (Intl) | Metric | 09-14-2020 | Download |
| Data Sheet PRM (Spanish) | Metric | 09-14-2020 | Download |
M-Series PRM - IOM Manuals
| Title | Description | Date modified | Download |
|---|---|---|---|
| IOM Manual PRM (US) | Imperial | 05-21-2021 | Download |
| IOM Manual PRM (Spanish) | Metric | 05-21-2021 | Download |
M-Series PRM - Dimensional Drawings
M-Series 3-Port @ 180° (1/4" - 1/2") (DN 8 - DN 15)
| Title | Description | Date modified | Download |
|---|---|---|---|
| Dim PRM 3Port@180 Threaded US | 1/4" - 1/2" | 08-24-2020 | Download |
| Dim PRM 3Port@180 Threaded Metric | DN 8 - DN 15 | 08-24-2020 | Download |
| Dim PRM 3Port@180 Socket US | 1/4" - 1/2" | 08-24-2020 | Download |
| Dim PRM 3Port@180 Socket Metric | DN 8 - DN 15 | 08-24-2020 | Download |
| Dim PRMU 3Port@180 Union US | 1/4" - 1/2" | 08-24-2020 | Download |
| Dim PRMU 3Port@180 Union Metric | DN 8 - DN 15 | 08-24-2020 | Download |
M-Series 2-Port @ 180° (1/4" - 1/2") (DN 8 - DN 15)
| Title | Description | Date modified | Download |
|---|---|---|---|
| Dim PRM2 2Port@180 Threaded US | 1/4" - 1/2" | 08-24-2020 | Download |
| Dim PRM2 2Port@180 Threaded Metric | DN 8 - DN 15 | 08-24-2020 | Download |
| Dim PRM2 2Port@180 Socket US | 1/4" - 1/2" | 08-24-2020 | Download |
| Dim PRM2 2Port@180 Socket Metric | DN 8 - DN 15 | 08-24-2020 | Download |
| Dim BPMF 2Port@180 Flanged US | 1/4" - 1/2" | 08-24-2020 | Download |
| Dim BPMF 2Port@180 Flanged Metric | DN 8 - DN 15 | 08-24-2020 | Download |
| Dim BPMU 2Port@180 Union US | 1/4" - 1/2" | 08-24-2020 | Download |
| Dim BPMU 2Port@180 Union Metric | DN 8 - DN 15 | 08-24-2020 | Download |
M-Series 2-Port @ 90° (1/4" - 1/2") (DN 8 - DN 15)
| Title | Description | Date modified | Download |
|---|---|---|---|
| Dim PRM290 2Port@90 Threaded US | 1/4" - 1/2" | 08-24-2020 | Download |
| Dim PRM290 2Port@90 Threaded Metric | DN 8 - DN 15 | 08-24-2020 | Download |
| Dim PRM2F90 2Port@90 Flanged US | 1/4" - 1/2" | 04-05-2021 | Download |
| Dim PRM2F90 2Port@90 Flanged Metric | DN 8 - DN 15 | 04-05-2021 | 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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