Is the inlet control valve of the feed gas compressor in the hydrogen production plant a pressure-controlled valve or a flow-controlled valve?
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Hello, teachers! I have a question: generally speaking, there is a pressure-controlled valve in front of the liquid separation tank at the inlet of the feed gas compressor in hydrogen production plants. I would like to ask about the difference between this valve being a pressure-controlled valve or a flow-controlled valve. Generally, for gases, pressure and flow rate should be directly proportional to each other. Also, please explain in detail the difference between pressure control valves and flow control valves. Thank you so much!
In my personal understanding, pressure-controlled valves and flow-controlled valves are two distinct concepts; both types are regulation valves, but their purposes are to control pressure (for example, to regulate the pressure during venting from a tank) or to control flow rates (such as the amount of material fed in or returned).
Control the pressure to prevent overpressure at the compressor inlet
Flow control valves for various raw materials; pressure control for two-in-one and topping applications