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Self-Sealing Cryogenic Fitting (1994)

Lin, Gary ; Moslemian, Davood ; Jia, Lin Xiang ; [et al.]

In: Other Sources

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Publication Date: 2019-07-13

Description: Self-sealing fitting for cryogenic tubes remains free of leakage from room temperature to liquid-helium temperature even at internal pressure as high as 2.7 MPa. Fitting comprises parts made of materials with different coefficients of thermal expansion to prevent leakage gaps from forming as temperature decreases. Consists of coupling nut, two flared tube ends, and flared O-ring spacer. Spacer contracts more than tube ends do as temperature decreases. This greater contraction seals tube ends more tightly, preventing leakage.

Keywords: ELECTRONIC COMPONENTS AND CIRCUITS

Type: KSC-11599 , NASA Tech Briefs (ISSN 0145-319X); 18; 5; P. 85

Format: text

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