This is a Suit and Cabin Temperature Control Valve used in the Gemini program. Mounted between the two ejection seats, the dual concentric knobs turned by the astronauts controlled the operation of valves regulating the flow rate of primary and secondary coolant through the suit and cabin heat exchangers. Clockwise rotation resulted in increased temperatures. There is no indication that this valve was ever flown in space and it was probably used for testing. Airesearch Mfg. Co. made the valve and NASA transferred it to NASM in 1969.
Transferred from the National Aeronautics and Space Administration