This paper presents a status update on the low leakage cryogenic test valves currently under development at NASA’s Marshall Space Flight Center. These valves consist of a 3-inch isolation valve, a 3-inch relief valve, and an 8-inch pre-valve. Each of these valves contain a self-aligning seat and poppet design to significantly reduce the quantity of propellant flowing past the seat when the valve is in its closed state (internal leakage). This self-aligning design utilizes a metallic poppet head with five degrees of freedom and is intended to allow a valve to be more tolerant of the imperfect contacts and misalignments that are commonly found between sealing surfaces. This paper covers the test articles, facilities, objectives, and preliminary results.


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    Title :

    Low Leakage Valves for Long Duration Missions


    Contributors:

    Conference:

    AIAA Science and Technology (SciTech) Forum and Exposition 2023 ; 2023 ; National Harbor, MD, US


    Publication date :

    2023-01-27


    Type of media :

    Audio-visual


    Type of material :

    No indication


    Language :

    English




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