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Installation and maintenance：
①The exhaust check valve is installed vertically on the horizontal pipe and is generally in full open condition.
②Lift vertical valve shall be installed on vertical pipe, lift horizontal valve and rotary check valve shall be installed on horizontal pipe.
③Note that the flow direction mark on the valve is consistent with the medium flow direction before installation.
④The media passing through the pipeline should not have hard particles to avoid damaging the sealing surface
⑤Proper packing protection, shock protection and collision prevention in cylinder parts;
⑥Valve should be placed smoothly, pneumatic drive device up, not mutually extruded.
⑦In use, attention should be paid to whether the valve has abnormal sound and vibration. In order to prevent the water hammer effect in the pipeline, attention should be paid to the pressure fluctuation of the pipeline medium.
What are the methods to remove check valve troubleshooting?
Common faults and troubleshooting methods：
| Common faults | Common faults | Exclusion methods |
| Disc not open or closed | The rocker is too tight with the pin shaft or foreign body is stuck | Checking coordination |
| Foreign body blocking in valve | Elimination of foreign bodies | |
| Leakage at valve body and bonnet connection | Unfastened connection bolts | Uniformly tighten |
| Flange seal damage | Re-repair | |
| Gasket rupture or failure | Replacement of new gaskets | |
| Valves are loud andvibrating | Valve position too close to pump | Re-install proper location |
