Butterfly valves are not suitable for certain scenarios and conditions, and the following are the main cases in which butterfly valves are not used
First, high viscosity fluid
Due to the structural characteristics of the butterfly valve, its seat pressure is sensitive to the viscosity of the fluid. When the fluid viscosity is high, it is easy to cause the seat pressure is not enough, resulting in fluid leakage, and even the formation of loopholes in serious cases, resulting in equipment safety accidents. Therefore, when dealing with high viscosity fluids, the use of butterfly valves should be avoided.
2. High temperature places
The sealing material of the butterfly valve is generally rubber, PTFE, etc., which will age, harden and become brittle under high temperature environment, thus affecting the sealing performance and service life of the butterfly valve. Therefore, in high temperature places, the sealing performance of the butterfly valve may not be guaranteed, and it is not recommended.
Third, precision control site
Compared with gate valves, globe valves and other valve types, butterfly valves are relatively poor in sealing. In the case of high requirements for precise control of fluid flow, pressure, temperature, etc., butterfly valves cannot meet the needs. For example, in piping systems where fluid flow needs to be precisely regulated, the use of butterfly valves can lead to inaccurate flow regulation, affecting the stability and performance of the system.
4. In the stirring reactor
In stirred reactors, due to the large changes in operating temperature and pressure of the liquid, as well as the presence of solid particles in the medium, the valve will be blocked, stuck or leaked. The internal structure of the butterfly valve is relatively simple, but in the medium containing solid particles, its sealing performance may be affected. Therefore, butterfly valves are not an ideal choice in stirring reactors.
5. The fluid contains particles
There is a pair of rubber seat inside the butterfly valve, and the sealing measures of the seat are generally made of elastic materials (such as rubber, etc.). However, this sealing method is only suitable for situations where the fluid does not contain particulate impurities. If particulate matter is encountered during operation, it will make the rubber seat solidify and affect its sealing performance. Therefore, the use of butterfly valves should be avoided in situations where the fluid contains particles.