Gas pressure and flow rate regulation control
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Could someone explain the principle by which control valves regulate pressure and flow? What I don’t understand is what effect adjusting the flow rate has on pressure – is pressure not adjusted when adjusting the flow, and is flow rate not adjusted when adjusting pressure?
Pressure regulation range: It refers to the adjustable range of the output pressure P2 of the pressure reducing valve, within which a specified accuracy must be achieved. The voltage regulation range is mainly related to the stiffness of the voltage regulation spring. Pressure characteristic: It refers to the property in which, when the flow rate g is constant, fluctuations in the input pressure cause fluctuations in the output pressure. The smaller the fluctuation in output pressure, the better the performance of the pressure reducing valve. The output pressure must be lower than the input pressure by a fixed value in order to remain essentially unchanged regardless of variations in the input pressure. Flow characteristics: It refers to the property in which, at a constant input pressure, the output pressure changes as the output flow rate g varies. When the flow rate g changes, it is desirable for the change in output pressure to be as small as possible. Generally, the lower the output pressure, the smaller the fluctuation of it with changes in output flow rate.