About butterfly valves
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For manual butterfly valves, they belong to the category of on-off valves, but they also have a certain regulating function. Now, I would like to ask whether pneumatic or electric butterfly valves also fall under the category of control valves, and whether they have some regulating function as well.
Pneumatic or electric butterfly valves also belong to the category of on/off valves and have a certain regulating function, but they are generally not used for frequent adjustment of the opening degree. 1 Butterfly valves are commonly used in pipes that remain open and are rarely switched on and off. 2. Due to frequent opening and closing, the sealing surfaces of the valve are damaged very quickly, requiring certain adjustments; however, it is difficult to maintain the opening degree at a constant level. This post was last edited by qq375170364 on 2009-4-10 22:05.]
A pneumatic valve can be used for regulation by installing an electrical positioner; without it, it can only be used as a switch. If an electric valve is to be used for regulation, then a regulating type electric actuator needs to be used instead! For butterfly valves, a higher degree of precision in adjusting the opening angle is achieved when the angle is set between 20 degrees and 70 degrees. I’m not sure if this answer satisfies the original poster. QQ: 928976489 (Your control valve consultant)
Please see the characteristics and application scenarios of butterfly valves at http://bbs.hcbbs.com/viewthread.php?tid=297022. For more information on butterfly valves, visit http://bbs.hcbbs.com/viewthread.php?tid=251197
Butterfly valves, whether manual, electric, or pneumatic, are all types of on-off valves; they have a certain degree of regulating capability, but their regulating performance is poor, so it is best not to use them for regulation. However, I have also seen imported systems abroad that use pneumatic butterfly valves for such purposes