Common problem handling of knife gate valve

? ? Knife Gate ValveCommon problem handling:

1. Pressure hole leakage

On the valve cover of some knife 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 at the valve body connection

The valve body and valve cover of a knife gate valve 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

The corrosive ability, temperature, and pressure of the medium in the pipeline can 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.