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
| Size | Maximum Flow | Maximum Pressure | |||||
| Pulsating | Continuous | ||||||
| Inch | Metric | GPH | LPH | GPM | LPM | PSI | BAR |
| 1/2" | DN 15 | 600 | 2,271 | 30 | 114 | 250 | 17 |
| 3/4" | DN 20 | 600 | 2,271 | 30 | 114 | 250 | 17 |
| 1" | DN 25 | 1,000 | 3,785 | 54 | 204 | 250 | 17 |
| 1 1/2" | DN 40 | 5,157 | 19,521 | 270 | 1,022 | 250 | 17 |
| 2" | DN 50 | 5,157 | 19,521 | 270 | 1,022 | 250 | 17 |
High Flow PRHF - Data Sheets
| Title | Description | Date modified | Download |
|---|---|---|---|
| Data Sheet PRHF (US) | Imperial | 06-28-2021 | Download |
| Data Sheet PRHF (Intl) | Metric | 09-14-2020 | Download |
| Data Sheet PRHF (Spanish) | Metric | 09-14-2020 | Download |
High Flow PRHF - IOM Manuals
| Title | Description | Date modified | Download |
|---|---|---|---|
| IOM Manual PRHF (US) | Imperial | 09-14-2020 | Download |
High Flow PRHF - Dimensional Drawings
High-Flow 2-Port @ 180° (1/2" - 3/4") (DN 15 - DN 20)
| Title | Description | Date modified | Download |
|---|---|---|---|
| Dim PRHF 2Port@180 Threaded US | 1/2" - 3/4" | 08-24-2020 | Download |
| Dim PRHF 2Port@180 Threaded Metric | DN 15 - DN 20 | 08-24-2020 | Download |
| Dim PRHF 2Port@180 Socket US | 1/2" - 3/4" | 08-24-2020 | Download |
| Dim PRHF 2Port@180 Socket Metric | DN 15 - DN 20 | 08-24-2020 | Download |
| Dim PRHFF 2Port@180 Flanged Metric | DN 15 - DN 20 | 08-24-2020 | Download |
High-Flow 2-Port @ 180° (1") (DN 25)
| Title | Description | Date modified | Download |
|---|---|---|---|
| Dim PRHF 2Port@180 Threaded US | 1" | 08-24-2020 | Download |
| Dim PRHF 2Port@180 Threaded Metric | DN 25 | 08-24-2020 | Download |
| Dim PRHF 2Port@180 Socket US | 1" | 08-24-2020 | Download |
| Dim PRHF 2Port@180 Socket Metric | DN 25 | 08-24-2020 | Download |
| Dim PRHFF 2Port@180 Flanged Metric | DN 25 | 08-24-2020 | Download |
GRIFFCO PRODUCTS
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Griffco Valve fully stands behind all the products it manufactures and sells. Find out more information about our quality certifications and organizations.
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