High-cycle applications such as pressure swing adsorption and molecular sieve adsorption are very abusive on control valves.
Pressure Swing Adsorption (PSA) inlet valves feed hydrogen and light hydrocarbon gas into the PSA unit. During operation, these valves are either wide open or fully closed, so throttling control is not important, but it is essential that they open and close reliably when required to do so. To ensure a steady supply of high purity hydrogen, the PSA process causes the valves to cycle every few minutes, while the pressure must be tightly controlled.
