Pneumatic butterfly valve common faults and elimination methods

First, the test and adjustment of pneumatic butterfly valve
1. Butterfly valves, whether manual, pneumatic, hydraulic or electric, are strictly calibrated before leaving the factory. When re-inspecting the sealing performance, the user should evenly fix both sides of the inlet and outlet, close the disc valve and apply pressure to the inlet side. Observe the leakage on the exit side. Before the pipeline is tested for strength, the disc should be opened to prevent damage to the seal pair.
2. Although the pneumatic butterfly valve has been strictly inspected and tested before leaving the factory, there are also automatic screw displacements of individual products during transportation. It needs to be re-adjusted, pneumatically, hydraulically, etc. Please read the instruction manual of the supporting drive unit.
3. The electric drive disc valve has adjusted the opening and closing stroke of the control mechanism at the factory. In order to prevent the power supply from being turned on, the user should first open the manual to the half-open position after the power is turned on for the first time, and press the electric switch to check the direction of the indicator plate and the valve closing direction.
 
Second, the common faults and elimination methods of pneumatic butterfly valves
1. Before installation, confirm whether the performance of the product and the flow direction arrow of the factory are consistent with the movement conditions, and insert the valve cavity clean, do not allow foreign matter with impurities on the seal ring and the butterfly plate, and never allow it before cleaning. Close the disc to avoid damaging the seal.
2, the disc mounting flange is recommended to use the special flange of the disc valve, that is, HGJ54-91 socket welding steel flange.
3. The position installed in the pipeline, the best position is vertical, but it cannot be flipped.
4, need to adjust the flow during use, there is a worm gear box for control.
5, open and close the number of disc valves, in about two months, open the worm gear cover, check whether the butter is normal, should maintain the right amount of butter.
6. Check the compression requirements of each joint, that is, ensure the tightness of the packing, and ensure the flexible rotation of the valve stem.
7. The metal sealing butterfly valve product is 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 adopt the fitting outlet flange to prevent the sealing ring from being over-compressed.
8. The valve stem is installed and used to check the valve usage regularly, and the fault is found to be eliminated in time.