LM Descent Engine shut-off valve housing for the oxidizer side, measuring approximately 6.5 x 5 x 5, labeled for the “Oxidizer Outlet” and “Oxidizer Inlet,” with a part number on the reverse, “Assy 170730B.” Includes original plastic packaging bearing a toned inspection tag, “Cleaned per TRW, Specification PR2-2J, Level 1, Date Jun 25 1970, P/N 170730.” In fine condition. This housing comprised the external structure of the quad redundant ball operated shutoff valves that regulated propellant flow from the Lunar Module’s storage tanks into the Lunar Module Descent Engine (LMDE). The valves were commanded open and shut in conjunction with the LMDE flow control valve and variable pintle injector for throttle control and engine shutdown.
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