Cryogenic Isolation and Vent Valves
Cryogenic Ball Valves
These valves are pneumatically-operated, using nitrogen or helium to provide actuation pressure. They are ball valves, which provide the lowest pressure drop across the valve for their flow rate capability. Position indication is incorporated in some of the valves.
Cryogenic Poppet Valves
. These valves are pneumatically-operated, using nitrogen or helium to provide actuation pressure. They are poppet-style valves, which provide a lower cost option to ball valves while still providing a sufficiently low pressure drop and acceptable weight.
Cryogenic Special Application Valves
The three valves are pneumatically-operated, using nitrogen or helium to provide actuation pressure. Their pilot-operated designs provide low-weight solutions relative to their flow capacity.
Continuous Vent Valve
Moog model 54-164 is a cryogenic gas control valve (CVV) that provides propellant tank ullage venting for the NASA SLS Exploration Upper Stage.
Pneumatically Pilot Operated Two Stage Valves
Moog Models 54E131 and 54E132 (Ox and F) are pneumatically pilot operated two stage valves designed for use on a LO2 / Ethanol bipropellant engine. A common design is shared by both propellants but with slightly varied test requirements.
