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How to effectively troubleshoot a large-diameter pneumatic butterfly valve
- Mar 22, 2018 -

1. Before installing the pneumatic butterfly valve, make sure whether the product performance of the pneumatic butterfly valve and the medium flow direction are consistent with the working conditions, and clean the valve cavity. Do not allow any impurity on the sealing ring and butterfly plate to be attached. Do not allow the butterfly plate to be closed beforehand so as not to damage the seal ring.

2. Pneumatic butterfly valve installation, special disc valve flange is recommended to use, namely HGJ54-91 type socket welding steel flange.

3. Pneumatic butterfly valve installed in the pipe position, the best position is vertical, but cannot be installed upside down.

4. The use of pneumatic butterfly valve to adjust the flow, controlled by a pneumatic actuator.

5. For manual butterfly valves with more opening and closing times, open the worm gear box cover once two months, to check if the butter is normal and maintain proper amount of butter.

6. Check the tightness of the joints, that is, to ensure the seal ability of the packing, and to ensure that the valve stem rotates flexibly.

7. Periodically check the effect of the butterfly valve, and ensure that the fault is eliminated in time when find out.

Pneumatic butterfly valve sealing surface leakage troubleshooting:

1. Disc, sealing surface with debris

2. Butterfly disc, closed position of sealing surface is not correct

3. The output side is not uniform with flange bolts

Exclusion of leaks at both ends of pneumatic butterfly valves:

1. Failure of seal gasket on the two sides

2. The pipe flange is not uniform or tight

3. Failure of the seal ring and the lower gasket.