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Artifact: Directional Control Valve, Liquid Hydrogen Fuel Tank, Saturn IB Second Stage & Saturn V Third Stage (S-IVB)

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Identifier: A20120055
Artifact Category: Rocket Propulsion Systems
Period of Employment: November 9 1967 to December 6 1972
Manufacturer: CALMEC Manufacturing
NASA Contract Number: NAS7-101
Spacecraft/Launch Systems: Saturn I/IB,Saturn V
Materials:

Aluminum, Stainless Steel

Dimensions: 16 x 12.5 x 11.5 (Inches)
Weight: 16.6 (Pounds)
Flight Vehicle System or Component: Propellant Venting
Program: Apollo
Flown Status: Unflown
Description:

Saturn V Third Stage Directional Control Fuel Vent Valve manufactured by CALMEC Corporation for Douglas Aircraft Corporation (primary integrator for the S-IVB under NASA Marshall Space Flight Center Contract NAS7-101). During ground fueling operations, the valve routed Gaseous Hydrogen (GH2) overboard to the burn pond via the LH2 Ground Vent Disconnect Coupling (an example of which can be seen below in this collection). During flight, the control valve diverted GH2 though the stage non-propulsive vents for expulsion into space, or via the propulsive vents to support stage Ullage augmentation (propellant settling) in concert with the Auxiliary Propulsion System (APS). The valve was pneumatically operated utilizing 475 psig gaseous helium from onboard storage tanks.

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