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Pneumatic control valve

2017-08-10View Original

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How to determine whether a double-cylinder butterfly valve operates in open or closed mode? ? ?
Reply #22017-08-11
A two-cylinder system (if there are no springs inside the cylinders) does not have a mechanism for opening or closing based on air pressure; it remains in its original position when there is no air pressure. Unless you force it to shut down or turn off in an emergency through the pneumatic components, in case of an accident. Some dual-cylinder models are equipped with an air storage tank
Reply #32017-08-11
A two-cylinder system (if there are no springs inside the cylinders) does not have a mechanism for opening or closing based on air pressure; it remains in its original position when there is no air pressure. Unless you force it to shut down or turn off in an emergency through the pneumatic components, in case of an accident. Some dual-cylinder models are equipped with an air storage tank
Reply #42017-08-11
Such valves indicate their mode of operation on the nameplate; if not, you need to know whether the spring is inside the cylinder to keep it open or closed
Reply #52017-08-12
Dual-acting valves don’t have such a thing as an opening/closing air switch; the operation of the valve’s opening and closing is driven by an air supply
Reply #62017-08-12
Could you please be more specific? I’m not quite sure whether it’s air-driven for opening or closing in the cylinder – I find it a bit confusing.
Reply #72017-08-12
For example, if the intake on the left is open and that on the right is closed, and there is a spring inside the right cylinder, then in the event of a loss of pressure (when the valve does not have a holding function), the valve remains closed. This type of cylinder, which has a spring at one end but also dual intakes, is generally designed to provide \"force\" to the cylinder with a spring in order to help the valve return to its position more quickly. Please point out any mistakes
Reply #82017-08-12
I’ve seen a lot of them, but I can’t figure out how to turn the air on and off
Reply #92017-08-13
When referring to gas on and gas off, it generally denotes single-acting valves

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