The overhaul process of the plug valve mainly includes the following steps:
Closing the valve and draining the pressure:Before proceeding with the dismantling overhaul, the plug plate valve needs to be closed and the valve is closed. Then, use the appropriate tools to evacuate the pressure to ensure the safety of the work area.
Remove the gearing:Plug-in valves are usually equipped with a transmission such as a handwheel or electric actuator. Before dismantling, the transmission needs to be removed to facilitate subsequent operation.
Removing the bonnet and plug plate:Using a suitable tool, remove the bolts or nuts on the bonnet one by one, and then remove the bonnet and plug plate from the valve body. Note that care needs to be taken during disassembly to avoid damaging the sealing surface of the valve.
Cleaning and Inspection:Remove bonnets, plug plates, and other parts are cleaned to remove dirt and deposits from the surface. Then, carefully inspect the surface condition of these parts for wear, corrosion, or other damage.
Replace the seals:According to the inspection results, if the seal of the valve is found to be damaged or aged, it needs to be replaced with a new seal. Make sure you select the right seal and install it correctly on the bonnet and plug plate.
Assembly & Installation:After replacing the seal, reinstall the plug plate and bonnet into the valve body and make sure the bolts or nuts are properly tightened. Then, reinstall the drive onto the valve to make sure it's working properly.
Debugging and testing:After assembly, the plug-in valve needs to be commissioned and tested to ensure its proper functioning. The valve can be operated manually, or a pressure test or leak test can be performed using appropriate test equipment.
Records and Reports:After the dismantling and maintenance work is completed, all the operation steps and maintenance results need to be recorded, and the relevant maintenance report needs to be prepared. These records and reports are important for future maintenance and management.
The above is the main process of plug valve maintenance, and the specific operations and steps can be adjusted and supplemented according to the actual situation. Before proceeding with the dismantling overhaul, it is necessary to ensure that there is sufficient expertise and experience, and that the operation is carried out in strict accordance with the relevant safety regulations.
Detersen plug-in valve