A Supercritical Helium Conditioning Unit
The Lunar Module Spacecraft contains a supercritical helium storage tank. Onboard helium is used to pressurize the propulsion system in the descent stage, A supercritical helium conditioning unit is required to service the spacecraft storage tank and is installed on the servicing tower at the Apollo Launch Complex. Servicing of the spacecraft tank requires that ambient helium gas be refrigerated to near liquid helium temperature prior to delivery. Gas is delivered at pressures up to 500 psig and mass flow rates to 3.25 lb/min. The entire servicing function is controlled and monitored remotely.
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