Pressure requirements for selecting control valves
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I would like to reduce the gas pressure before the valve (hydrogen) from 2.0 MPa to 0.5 MPa using a control valve. Is that possible? Is a pressure difference of 15 kilograms considered large? Is it possible to reduce the pressure from 100 kilograms in front of the control valve to 30 kilograms behind it? What are the requirements for selecting regulators?
There are control valves designed for high pressure differences; it is necessary to refer to the selection guidelines for such control valves. If the pressure difference is too large and no suitable control valve is available, pressure can be reduced in stages.
Yes, generally, valve manufacturers will carry out calculations based on the parameters you provide
1. The pressure behind the valve is created by the flow rate passing through it, and it is not determined by the pressure reduction provided by the control valve. 2. Both operating conditions are choked flow; flow rate has no relation to differential pressure, but it is related to P1. In other words, the larger the P1 you choose, the smaller the circulation area required. 3. Based on noise calculations, decide whether to use a multi-stage pressure-reducing spool. @jiaguoyun @Big Horse with Big Bow
What specific pressure differences require first-level, second-level, or third-level pressure reduction? There should be concrete values, such as 10 kilograms, 50 kilograms, 100 kilograms of pressure difference.