Reasons for poor sealing of butterfly
valves
1. Structural characteristics of butterfly
valves
The sealing performance of butterfly valves
is mainly composed of valve body, valve seat and valve. In general, due to the
structural characteristics of butterfly valves, the valve seat material is
simple, generally made of soft materials such as rubber or
polytetrafluoroethylene, and the sealing performance is difficult to guarantee.
In addition, the valve body structure and valve stem size of butterfly valves
are small, and the inlet and outlet channels are also narrow, which will also
affect the sealing performance.
2. Improper operation
In actual applications, the sealing
performance of butterfly valves is also affected by improper operation. For
example, during the opening and closing process, if the valve is not closed
tightly or not tightly enough, the sealing performance will be affected.
3. Material quality
The material quality of butterfly valves
will also affect its sealing performance. If the valve seat material is not
suitable or the manufacturing process is not standardized, it may lead to poor
sealing performance of butterfly valves.
The impact of poor sealing of butterfly
valves
1. Liquid or gas leakage
Due to the poor sealing performance of
butterfly valves, the valve is not closed tightly or not tightly enough, which
may cause liquid or gas leakage. This will not only cause safety hazards in the
production process, but also may cause environmental impact.
2. Unstable flow control
The poor sealing of butterfly valves will
also affect their flow control capabilities. If the valve is not closed
tightly, the flow control will become unstable, and the impact on the
production process will also occur.
3. High maintenance costs
Due to the poor sealing of butterfly
valves, maintenance is required more frequently. Maintenance generally requires
downtime, which causes great inconvenience to production and increases
maintenance costs.
How to improve the sealing performance
of butterfly valves
1. Select the right materials
Choosing the right materials for the valve
seat and valve can improve the sealing performance of butterfly valves.
Generally speaking, valve seats made of hard materials can ensure better
sealing performance.
2. Ensure correct operation
The correct operation method can
effectively ensure the sealing performance of butterfly valves. For example,
when closing the valve, ensure that the valve fits tightly, and when opening
the valve, turn it slowly to avoid violent opening and closing.
3. Do a good job of maintenance
Regularly checking and cleaning the
butterfly valve and replacing worn or aged valve seat materials can effectively
improve the sealing performance of the butterfly valve. This will extend the
service life of the butterfly valve and reduce maintenance costs.
Conclusion
After a deep understanding of the causes of
poor butterfly valve sealing and its possible impact, in actual applications,
users should combine the characteristics of their own production processes,
conduct detailed understanding of butterfly valves with valve supplier,
select appropriate butterfly valve types, and correctly operate and maintain
butterfly valves to ensure their normal use and improve production efficiency.