Hydranor 's check valves are on/off circuit components that allow free flow from port 1 to port 2 and block flow in the opposite direction.
| Dimension | Max. flow | Weight |
| 10 ½" | 50 l/min | 0.075 kg |
| 20 1" | 200 l/min | 0.200 kg |
| 30 1 ½" | 450 l/min | 0.520 kg |
Max. operating pressure: 350 bar
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