Pneumatic butterfly valve common failures and elimination methods

Pneumatic butterfly valve test and adjustment

1. The butterfly valve, whether manual, pneumatic, hydraulic, electric components are strictly debutted before leaving the factory. When the user rechecks the sealing performance, the import and export sides should be fixed evenly, the disc valve should be closed, the pressure on the import side should be applied, and the leakage phenomenon should be observed on the export side.

2. Although the pneumatic butterfly valve has been strictly inspected and tested before leaving the factory, there are also some automatic screw alignment of individual products in transit, which needs to be readjust, pneumatic, hydraulic, etc. Please read the operation manual of the supporting driving device.

3. The starting and closing stroke of the control mechanism has been adjusted well when the electric drive disc valve leaves the factory. In order to prevent the wrong direction when the power is switched on, the user should turn on the power for the first time, manually to the half-open position, and then press the electric switch to check that the direction of the indicator disc is consistent with the closed direction of the valve.

The common failure of pneumatic butterfly valve and its elimination method

1. Install the front channel to confirm whether the product performance and the medium flow direction arrow are consistent with the movement condition, and wash the valve cavity. Do not allow impurities and foreign bodies to be attached to the sealing ring and the butterfly plate.

2. It is recommended to use special flange for disc valve for plate installation.

3. installed in the pipeline position, the best position for vertical installation, but not upside down.

4. the use of the need to adjust the flow, there are worm gear box control.

5. open and close the dish valve more times, in two months or so, open the worm gear cover, check whether the butter is normal, should maintain the right amount of butter.

6. check the connection parts are required to press, that is, to ensure the sealing of the packing, but also to ensure the flexible rotation of the valve stem.

7. Metal seal butterfly valve products are not suitable for installation at the end of the pipeline. If it must be installed at the end of the pipeline, it is necessary to install the outlet flange to prevent the sealing ring from overloading and overpositioning.

8. Valve stem installation and use reaction Check the valve use effect regularly, and remove the fault in time.