company news about What are common butterfly valve problems?

During long-term operation, butterfly valves are prone to several typical issues.

1. Actuator Failure (Electric/Pneumatic)

Causes: Overload of the electric butterfly valve motor or wiring faults; unstable air supply or air leaks in the cylinder of pneumatic butterfly valves, preventing the valve from operating normally.

2. Rapid Deterioration of Rubber Seals

Causes: Excessively high or low medium temperatures, exposure to oils, or acidic/alkaline environments exceed the temperature and corrosion resistance limits of the seals, causing hardening, cracking, or detachment.

3. Leakage Issues

Causes: In soft-seal butterfly valves, prolonged use causes the rubber gasket to age, wear out, or deform under compression, resulting in internal or external leaks; in hard-seal butterfly valves, debris lodged between the seat and the disc sealing surface, or wear, leads to poor sealing.

4. Sticking during operation and high torque

Causes: Contaminants trapped in the valve cavity; worn or corroded bushings; undersized actuator; deformed valve stem, resulting in difficult operation and jerky movement.

5. Incomplete Opening/Closing or Malfunction

Causes: Actuator failure or inaccurate limit switches; loose connection between the valve stem and disc; component wear from long-term use, preventing the valve from fully opening or closing.

6. Valve Body Corrosion and Rust

Causes: Highly corrosive acidic or alkaline media, poor water quality, or mismatched material selection, resulting in corrosion and damage to the valve body and disc, which shortens the service life.