What is the purpose of adding a needle valve after the boiler water flow control valve?
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This post was last edited by Hesitant Wind on 2017-7-28 at 11:58. I earnestly ask the experts: what is the function of the needle valve located after the boiler water flow control valve? Can I not add a line?
I can’t answer you by asking directly like this; it’s only by considering the process and the PID diagram that we can determine whether it’s useful or not. In principle, a design that exists has a function