G-Series
Griffco G-series Griffco diaphragm back pressure valves and diaphragm pressure relief valves are designed to enhance the performance of chemical (dosing) pump systems by applying a continuous back pressure to the chemical feed pump, while also acting as an anti-syphon valve. The robust construction ensures reliability in heavy-duty industrial applications, among others. The G-series enables a higher flow compared to the M-series.
Liquid contact materials:
- PVC
- CPVC
- PP
- PVDF
- PTFE
- Halar®
- SS 316L
- Alloy 20
- Hastelloy® C
Available sizes:
- 1/2″ to 4″ or DN 15 to DN 100.
Features and benefits:
- High reliability at an affordable price
- Anti-syphon function
- Solid, robust, (machined) construction
- Wide range of materials
- Flanged-, union-, threaded- and glue/weld options
- Injection moulded Noryl top with integrated pressure lock
- SS 316L metall valvetop option
- Moulded PTFE / EPDM-diaphragm
- Several materialoptions for diaphragms
- Long lifetime diaphragm
- Pressure adjustable up to 25 bar
- 4 optional pressure ranges (springs)
- Connection sizes from 1/2“ up to 4” of DN15 up to DN100
- Tamper proof set screw
- High temperature option up to 150˚C
- Factory adjusted pressure or on site adjustable
Sizes, flowrange and pressure classifications | |||||||
Sizes | Max Flow | Max pressure | |||||
Pulsing | Continiously | ||||||
Inch | Metric | GPH | LPH | GPM | LPM | PSI | BAR |
1/2″ | DN 15 | 320 | 1,211 | 17 | 63 | 350 | 24 |
3/4″ | DN 20 | 367 | 1,389 | 19 | 72 | 350 | 24 |
1″ | DN 25 | 462 | 1,798 | 24 | 90 | 350 | 24 |
1-1/2″ | DN 40 | 1,388 | 5,254 | 72 | 275 | 250 | 17 |
2″ | DN 50 | 1,533 | 5,803 | 80 | 302 | 250 | 17 |
3″ | DN 80 | 5,157 | 19,521 | 270 | 1,020 | 250 | 17 |
4″ | DN 100 | 5,157 | 19,521 | 270 | 1,020 | 250 | 17 |