Helium Regulator Assembly that controlled the flow of propellant pressurization gas (helium) as part of the main propulsion system on the Apollo Command Service Module. The assembly measures 15.5" x 5.75" x 5", weighs 10.5 pounds, and retains its original yellow "Temporary Parts Removal Tag" from North American Rockwell's Space Division: "Part Number ME284-0020-0004, Serial/Lot Number 04650BHH0818, Authority E.O.M. 662551, E.O.M. 685727, Model Number V37-3, Part Number V37 460 202-601, Serial Number AAH 2164, Mark for Shipment of: S/C 109/116." One of the dual regulators bears a metal B. H. Hadley parts label: "Regulator Unit-Press., Helium SPS Opr. Press. 4500 PSIG Inlet. 185 PSIG Outlet, NAA / S & ID Control No. ME-284-0020-0004 Class III…Contract or Order No. LC NAS 9-150, B. H. Hadley Part No. 11326-3, Serial No. 04650BHH0818…Date 7-1-66." Metal warning tag reads: "Caution: Remove plug from ambient sensing port before applying pressure to regulator," and on the reverse: "1326412." The assembly is etched "97" and bears various stamps and markings, with one of the mount footings snapped off.
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