Common Problems and Solutions of Knife Gate Valve

    Knife type gate valveAfter long-term use, you may encounter some common problems. To address these issues, the editor provides relevant solutions to ensure the normal operation and sealing performance of the knife gate valve.

1. Pressure hole leakage issue:

On the valve cover of some knife type gate valves, there are pressure holes left by the manufacturer during pressure testing. If these pressure holes are not tightened enough, it is likely to cause valve leakage. So before using the knife gate valve, it is necessary to first tighten the pressure hole or directly weld the screws and screw holes.

2. Leakage problem at the valve body connection:

The valve body and valve cover of knife type gate valves are generally connected by flanges. If the fastening force at the connection is insufficient or the fastening connection is uneven, leakage may occur at this point. The technician's suggestion is to use flange diagonal fastening when using flanges as a connection method. In addition, the quality of the gaskets used for the connection should also be strong.

3. Packing leakage issue:

The corrosion ability, temperature, and pressure of the medium in the pipeline will have a certain impact on the packing of the knife gate valve, which is also the main cause of packing leakage. So when choosing the filling method, it is necessary to consider the properties of the medium inside the pipeline in practical applications.

Pneumatic stainless steel concealed stem knife type gate valve