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Butterfly valves are used widely, such as in water supply and drainage, chemical industry, petroleum, electric power, medical treatment, food, environmental protection, etc. In the process of using butterfly valves, the common fault is the leakage of the sealing surface. The following will analyze the causes of the leakage of the sealing surface and the troubleshooting methods.

Reason 1: The rubber sealing ring is aging and worn;

Preventive measures and troubleshooting methods: inspect regularly and replace.

Reason 2: The flow direction of the medium is wrong;

Preventive measures and troubleshooting methods, the valve is installed according to the medium flow direction arrow.

Reason 3: The pressure ring on the sealing surface is loose and damaged;

Preventive measures and troubleshooting methods: Check the pressure ring to make sure it is assembled correctly before installation, and check and replace it regularly.

Reason 4. The sealing surface is not tight

Preventive measures and elimination methods: improve manufacturing quality, and perform pressure test before use.

Reason 5: The valve stem is loose from the butterfly plate, causing the sealing surface to leak

Preventive measures and troubleshooting methods: improve the connection strength between the valve stem and the disc, and perform regular maintenance.