Natural Gas PSA Enrichment Unit Maintenance

For 4–8 tower pressure swing adsorption (PSA) units, we audit and fine-tune adsorption-tower and pressure-equalization step sequences to shorten switching dead time, reduce bed back-mixing, and restore design purity and recovery. High-frequency pneumatic program-controlled valves operating beyond 1 million cycles are individually disassembled for inspection, seal replacement, and actuation re-verification; carbon and zeolite molecular sieves are loaded in stratified layers using dense-packing techniques to control bed pressure drop and minimize attrition. Before-and-after comparative diagnostics on both purity and recovery quantify overhaul effectiveness and are compiled into a formal report.