What Occasions Are Butterfly Valves Not Suitable For?

Butterfly valve, as a common valve type, has the advantages of simple structure, fast opening and closing, and convenient operation, but it is not suitable for certain situations. butterfly valves are not suitable for use mainly in the following cases:
1.High-pressure or ultra-high-pressure situations
Reason: butterfly valve sealing structure is relatively simple, in high pressure or ultra-high pressure environment, sealing performance may not meet the requirements. High pressure media is easy to leak from butterfly valve seal, resulting in system pressure drop or media leakage, affecting the normal operation and safety of the system.
Suggestion: In high or ultra-high pressure situations, choose valve types with higher sealing performance, such as stop valves, ball valves or gate valves.
2.... situations where high precision flow control is required.
Reason: although butterfly valve flow characteristics are linear, but in some situations that require high precision flow control, its adjustment accuracy may not meet the requirements. butterfly valve valve disc in the process of rotation, the change of its flow area is nonlinear, may lead to unstable flow regulation.
Suggestion: In situations where high precision flow control is required, select valve types with better adjustment performance, such as control valves or throttle valves.
3.Medium containing solid particles or fibrous impurities
Reason: butterfly butterfly valve plate is easy to collide or entangle with solid particles or fibrous impurities in media rotation process, causing butterfly plate damage or the sealing surface wear. In addition, these impurities may also block the butterfly valve's flow path, affecting the butterfly valve's normal operation.
Recommendations: In media containing solid particles or fibrous impurities, wear resistance and resistance to blockage should be selected better valve types, such as plug valves, diaphragm valve or knife gate valves.
4. Extreme high or low temperatures
High temperature environment: Butterfly valve sealing material and valve body material will soften, deform or age at high temperature, resulting in reduced sealing performance or valve failure.
Low temperature environment: at low temperature, butterfly valve the sealing material will become brittle, easy to crack or leak. At the same time, low temperature will also increase the butterfly valve opening and closing torque, increase the operating difficulty.
Recommendations: In extreme heat or low temperature environments, choose a valve types that is temperature resistance, or use special sealing materials and valve body materials to adapt to extreme conditions.
V. ... situations that require frequent opening and closing or quick cutting.
Reason: although butterfly valve opening and closing speed is relatively fast, but in the case of frequent opening and closing or quick cutting, the number and speed of opening and closing may not meet the requirements. Frequent opening and closing will increase wear and tear on the butterfly butterfly valve sealing surface and reduce sealing performance; rapid cutting will cause shock and damage to butterfly plate and valve stem.
Suggestion: In case of frequent opening or quick cutting, choose valve types with good abrasion and impact resistance, such as ball valves or gate valves.