Can butterfly valves be used in steam pipelines?
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It is mainly used for shutting off flow in front of the vent, or other types of valves are more suitable for use in medium-temperature and medium-pressure applications
Butterfly valves are not suitable for shutting off steam, as they do not provide good sealing and are designed for quick opening. Steam relief valves should be opened and closed slowly; otherwise, the impact force will be too great. Globe valves or gate valves should be used instead – globe valves for smaller diameters and gate valves for larger ones.
Butterfly valves are not suitable for steam systems; globe valves or gate valves should be used instead
Classification of butterfly valves 1. Classification by structural form (1) Center-sealed butterfly valve (2) Single-eccentric sealed butterfly valve (3) Double-eccentric sealed butterfly valve (4) Triple-eccentric sealed butterfly valve 2. Classification by material of the sealing surface (1) Soft-sealed butterfly valve. 1) The sealing pair is composed of non-metallic soft materials against each other. 2) The sealing pair is composed of a metal hard material and a non-metal soft material. (2) Metal hard-sealed butterfly valve. The sealing pair is composed of metal hard materials against each other. 3. Classification by sealing type (1) Forced-sealing butterfly valve 1) Elastic-sealing butterfly valve. The sealing specific pressure is generated by the valve plate pressing against the valve seat when the valve is closed, as well as by the elasticity of the valve seat or the valve plate. 2) External torque sealing butterfly valve. The sealing specific pressure is generated by the torque applied to the valve shaft. (2) Pressurized sealing butterfly valve. The sealing pressure is generated by the elastic sealing elements on the valve seat or valve disc. (3) Automatic sealing butterfly valve. The sealing specific pressure is automatically generated by the medium pressure. 4. Classification by operating pressure (1) Vacuum butterfly valve. Butterfly valve with working pressure lower than that of the standard reactor atmosphere calendar. (2) Low-pressure butterfly valve. Butterfly valves with a nominal pressure PN < 1.6 MPa. (3) Medium-pressure butterfly valve. Butterfly valves with a nominal pressure PN of 2.5–6.4 MPa. (4) High-pressure butterfly valve. The nominal pressure PN is 10. Butterfly valves from 0 to 80.0 MPa. (5) Ultra-high pressure butterfly valve. Butterfly valves with a nominal pressure PN > 100 MPa. 5. Classification by operating temperature (1) High-temperature butterfly valves. Butterfly valves with t＞450°C (2) Medium-temperature butterfly valves. Butterfly valves with 120 C＜t＜450 ℃ (3) Butterfly valves for normal temperatures. 1 40C＜t
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Generally speaking, butterfly valves are not needed in steam pipelines; gate valves can be used instead
The best valves for handling steam are globe valves. Butterfly valves have leakage issues. Gate valves, on the other hand, are too large in size and expensive; over time, the gate can be eroded by the medium present, leading to leaks. I’m not sure if this answer satisfies you. QQ: 928976489 (Your control valve consultant)
I’m very satisfied; your answer was detailed. Thank you!
It’s best not to use butterfly valves; one of their drawbacks is that their sealing performance isn’t very good, and their pressure resistance is also low. Use globe valves instead! Globe valves are generally used for steam
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