Hydrogen/Helium Purifier Skid Assembly – Air Liquide GH2 450/650 – 26,000 SCFH with Regenerative Gas Dryer & Hydrogen Feed Compressor

What capacity and product purity does it produce?

The system is rated for 26,000 SCFH hydrogen throughput using a cryogenic adsorption dual-line active carbon bed design. The listing describes the output as "ultra-high-purity hydrogen" but does not specify the purity level in percentage or parts-per-million—ask the seller for the guaranteed purity specification and whether certification documentation is available. Cryogenic adsorption systems of this type typically achieve 99.999% to 99.9999% (5-nines to 6-nines) hydrogen purity depending on feed quality and regeneration cycle tuning, with trace impurities driven by the active carbon media condition and liquid nitrogen cooling effectiveness.

What utilities, footprint and power draw does it require?

The compressor uses a 64 kW (100 HP) motor at 1780 RPM, but total electrical load for the complete skid including PLC, instrumentation, and auxiliary systems is not stated—request a complete utility schedule from the seller. The system requires liquid nitrogen for cryogenic cooling during the adsorption cycle, and consumption rate is not provided but will depend heavily on feed gas impurity load and regeneration frequency. Physical dimensions, weight, and utility connection specifications are not included in the listing; ask for dimensional drawings, foundation load data, and inlet/outlet connection sizes before planning installation.

How long was it in service, how long has it been down, and how was it preserved?

The unit was manufactured in 1998 and previously operated in hydrogen purification service, but the listing does not state when it was removed from service, total operating hours, or preservation measures taken during storage. On hydrogen equipment of this vintage, internal condition of the active carbon beds, valve seats, and compressor internals are critical—ask the seller for service records, whether the unit was purged and nitrogen-blanketed, and whether liquid nitrogen cooling coils or heat exchangers were drained. The listing describes condition as "good operational appearance" and includes full documentation, but no functional test data or recent commissioning history is mentioned.

What is realistically involved in relocating and re-erecting it?

This is described as a "fully integrated" skid assembly combining three major subsystems, but whether it ships as one piece or requires field disassembly is not specified—ask the seller for rigging drawings, shipping weight breakdown, and maximum transport envelope dimensions. The listing states it is available "as a complete skid or as individual major components," suggesting modular removal is possible if transport or site access constraints require it. Typical re-commissioning of cryogenic hydrogen systems requires pressure testing of all lines, leak testing with helium or hydrogen, verification of PLC logic and telemonitoring interfaces, calibration of hydrogen detectors and safety interlocks, and test runs with liquid nitrogen before introducing hydrogen—budget for specialized technicians familiar with Air Liquide cryogenic purification equipment and allow several weeks for startup even with complete documentation.