The sealing surface is a very important part of the carbon steel gate valve, which has a great influence on the use of the valve. Therefore, maintenance of the sealing surface of the valve valve needs to be done well to prevent leakage.
1, should consider the use of fluid media conditions, select the appropriate soft seal to avoid dielectric corrosion or high temperature deformation.
2. The length of the bolts welded on the valve plate should not be too long. Otherwise, the bolts of the carbon steel gate valves 30С41НЖ will be too long to resist the flow of the valve body and can not play a sealing role; the opening of the screw rod is adjusted during installation, so that the sealing surface is firmly joined.
3, the valve should be marked when adjusting, the switch should pay attention to the strength, the gasket will not be disturbed.
4. Select the appropriate adjustment pad. The pad thickness should not exceed the step height of the sealing surface of the valve disc. The soft sealing pad and the sealing surface of the valve disc can be safely attached.
5. In order to prevent the clamping nut of the carbon steel gate valve from falling off, the nuts should be properly relaxed after being tightened.
6, if the valve seat sealing surface damage is very serious, it should be automatically abandoned.