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The manufacturer of A-typed hard seat double shaft boltless butterfly valve will show you the reasons for the internal leakage of the valve

2021-08-03 11:12

The manufacturer of A-typed hard seat double shaft boltless butterfly valve tells you that the most common cause of valve internal leakage is that the operation manager does not maintain the valve in consideration of the relatively expensive maintenance costs, or the lack of scientific valve management and maintenance methods does not affect the valve. Carry out preventive maintenance, causing the equipment to fail early.

Low price A-typed hard seat double shaft boltless butterfly valve
1. Reasons for the internal leakage of the valve during the construction period:
①The manufacturer of A-typed hard seat double shaft boltless butterfly valve tells you that improper transportation and hoisting will cause overall damage to the valve and cause internal leakage of the valve;
②When leaving the factory, the valve was not dried and anti-corrosive after the water pressure was applied, causing the sealing surface to rust and form internal leakage;
③The protection of the construction site is not in place, and there is no blind plate installed at both ends of the valve, and impurities such as rainwater and sand enter the valve seat and cause leakage;
④During installation, no grease was injected into the valve seat, causing impurities to enter the back of the valve seat, or internal leakage caused by burns during welding;
⑤The valve is not installed in the fully open position, causing damage to the ball. During welding, if the valve is not in the fully open position, welding spatter will cause damage to the ball. When the ball with welding spatter is switched on and off, it will further cause damage to the valve seat. , Which leads to internal leakage;
⑥A-typed hard seat double shaft boltless butterfly valve manufacturer tells you that welding slag and other construction remnants cause scratches on the sealing surface;
⑦The inaccurate limit at the time of delivery or installation causes leakage. If the valve stem drive sleeve or other accessories are misaligned with the assembly angle, the valve will leak.
2. Reasons for internal leakage of the valve during operation:
①A-typed hard seat double shaft boltless butterfly valve manufacturer tells you that the most common reason is that the operation manager does not maintain the valve in consideration of relatively expensive maintenance costs, or lacks scientific valve management and maintenance methods to prevent preventive maintenance of the valve. , Causing the equipment to malfunction in advance;
② Internal leakage caused by improper operation or failure to follow the maintenance procedures;
③In normal operation, construction leftovers scratch the sealing surface and cause internal leakage;
④The manufacturer of A-typed hard seat double shaft boltless butterfly valve tells you that improper pigging will damage the sealing surface and cause internal leakage;
⑤The manufacturer of A-typed hard seat double shaft boltless butterfly valve tells you that if you do not maintain or move the valve for a long time, it will cause the valve seat and the ball to lock up, and cause seal damage and internal leakage when opening and closing the valve;
⑥The valve switch is not in place to cause internal leakage. Any ball valve, regardless of the open or closed position, generally tilts 2°~3° to cause leakage;
⑦Many large-caliber ball valves have stem stoppers. If they are used for a long time, rust, dust, paint and other debris will accumulate between the stem and the stem stopper due to rust and other reasons. These debris will cause the valve Failure to rotate in place and cause leakage-If the valve is buried in the ground, lengthening the stem will produce and drop more rust and impurities to prevent the ball from rotating in place, causing the valve to leak;
⑧A-typed hard seat double shaft boltless butterfly valve manufacturer tells you that general actuators are also limited. If they cause corrosion for a long time, the hardening of the grease or the loosening of the limit bolts will make the limit inaccurate and cause internal leakage;
⑨The valve position of the electric actuator is set forward, and it is not closed in place to cause internal leakage;
⑩The manufacturer of A-typed hard seat double shaft boltless butterfly valve tells you that the lack of periodic maintenance and maintenance has caused the sealing grease to dry and harden. The dried sealing grease accumulates on the elastic valve seat, hindering the movement of the valve seat and causing sealing failure. 

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