Question regarding the setting pressure of a self-acting pressure control valve
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I have a question regarding the set pressure of self-acting pressure control valves. There is a PCV with a set pressure of 750 kPa; when the pipeline pressure is at 800 kPa, will this PCV remain in the closed state? Question 1: Shouldn’t the PCV open when the pipeline pressure is higher than its set pressure? Question 2: If the pump needs to maintain a certain flow rate, will the flow rate increase in order to keep the PCV open? Thank you
Hehe, first of all, there are two types of self-acting pressure control valves. One is a pressure relief valve, used to maintain the pressure behind the valve, and the other is a backpressure valve, used to maintain the pressure in front of the valve. I think it should be a back pressure valve installed at the pump outlet, to prevent the pressure at the pump outlet from becoming too high. If set at 750, it will open automatically when the value reaches 800 to maintain the pressure at 750, and it will close when the pressure drops. If the pump does not experience overpressure, the flow rate will not increase, as the overpressure valve remains closed
Agree with the person above; it depends on the mode of action of the PCV you choose!
It seems that your goal is to maintain a stable pressure behind the valve, at 750 kPa; therefore, when the pipeline pressure is at 800 kPa, this valve can be used to reduce it to 750 kPa.
Is the self-acting valve you’re referring to the one in my picture? If so, please feel free to get in touch with me. I’d be happy to get to know each other