Stainless Steel, Copper
Apollo Command Module primary water-glycol coolant pump manufactured in 1969 by Airesearch under subcontract to North American Aviation / Rockwell (Command Service Module (CSM) integrator under NASA contract NAS9-150 ). Two of these centrifugal pumps (primary/backup) were installed as part of the Environmental Control System to circulate 200 lb/hr of water/ethylene glycol coolant through the heat absorption and rejection equipment in the CSM. Typically throughout the course of a mission, only one pump would be utilized (in continuous mode) with the secondary pump being reserved in the event of primary unit/cooling loop failure.