Back Pressure Valves from Griffco
| Sizes, Flow Capacities & Pressure Ratings | ||||||||
| Series | Size | Maximum Flow | Maximum Pressure | |||||
| Pulsating | Continuous | |||||||
| Inch | Metric | GPH | LPH | GPM | LPM | PSI | BAR | |
| M-Series | 1/4″ | DN 8 | 100 | 375 | 5 | 19 | 350 | 24 |
| 3/8″ | DN 10 | 200 | 757 | 10 | 37 | 350 | 24 | |
| 1/2″ | DN 15 | 260 | 984 | 15 | 57 | 350 | 24 | |
| Unibody | 1/2″ | DN 15 | 260 | 984 | 15 | 57 | 150 | 10 |
| 3/4″ | DN 20 | 300 | 1,135 | 21 | 80 | 150 | 10 | |
| 1″ | DN 25 | 500 | 1,890 | 26 | 98 | 150 | 10 | |
| G-Series | 1/2″ | DN 15 | 300 | 1,135 | 21 | 80 | 350 | 24 |
| 3/4″ | DN 20 | 300 | 1,135 | 21 | 80 | 350 | 24 | |
| 1″ | DN 25 | 500 | 1,890 | 26 | 98 | 350 | 24 | |
| 1-1/2″ | DN 40 | 1,200 | 4,542 | 63 | 238 | 250 | 17 | |
| 2″ | DN 50 | 2,350 | 8,892 | 120 | 473 | 250 | 17 | |
| 3″ | DN 80 | 5,200 | 19,600 | 270 | 1,020 | 250 | 17 | |
| 4″ | DN 100 | 5,200 | 19,600 | 270 | 1,020 | 250 | 17 | |
| High-Flow | 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 | |