The impact of replacing the air valves in hydrogen reciprocating compressors
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What would be the consequences of using a hydrogen valve to supply nitrogen, or a nitrogen valve to supply hydrogen? What is the reason? Please discuss it
Due to the different molecular weights of hydrogen and nitrogen, their flow rates through the gas valve per unit time also differ. If nitrogen is pumped using a hydrogen valve, the pressure at the outlet will be relatively low; meanwhile, the back pressure will also be influenced by the outlet temperature, causing changes in the pressure distribution between the stages of a multi-stage compressor.
Due to the difference in molecular weight, using a hydrogen valve to supply nitrogen can damage the valve element, whereas using a nitrogen valve to supply hydrogen will not damage the valve. None of them meet the working conditions.