Performance of all-metal demountable cryogenic seals at superfluid helium temperatures

Performance of all-metal demountable cryogenic seals at superfluid helium temperatures

Two all-metal demountable cryogenic seals with an outside diameter of 36.6 mm, inside diameter of 27.2 mm and thickness of 0.51 mm were leak tested at room temperature (300 K), liquid nitrogen temperature (21 cycles at 77 K), liquid helium temperature (nine cycles at 4.2 K) and superfluid helium tem...

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Veröffentlicht in:Cryogenics (Guildford) 1991-11, Vol.31 (11), p.993-995
Hauptverfasser: Salerno, L.J., Spivak, A.L., Kittel, P.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
helium
leaks
Mechanical Engineering
Rational use of energy: conservation and recovery of energy
seals
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container_end_page 995
container_issue 11
container_start_page 993
container_title Cryogenics (Guildford)
container_volume 31
creator Salerno, L.J.
Spivak, A.L.
Kittel, P.
description Two all-metal demountable cryogenic seals with an outside diameter of 36.6 mm, inside diameter of 27.2 mm and thickness of 0.51 mm were leak tested at room temperature (300 K), liquid nitrogen temperature (21 cycles at 77 K), liquid helium temperature (nine cycles at 4.2 K) and superfluid helium temperature (four cycles at 1.6 K). Each seal was mounted and demounted for 13 cycles. Thickness measurements at 90° intervals along the circumference showed a maximum seal compression of 0.038 mm. Leak rate measurements at all temperatures showed no detectable leak above the helium background level, typically 0.1 × 10 −9 std cm 3 s −1, during testing.
doi_str_mv 10.1016/0011-2275(91)90226-M
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Each seal was mounted and demounted for 13 cycles. Thickness measurements at 90° intervals along the circumference showed a maximum seal compression of 0.038 mm. Leak rate measurements at all temperatures showed no detectable leak above the helium background level, typically 0.1 × 10 −9 std cm 3 s −1, during testing.</description><subject>Applied sciences</subject><subject>Energy</subject><subject>Energy. 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source Elsevier ScienceDirect Journals; NASA Technical Reports Server
subjects Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
helium
leaks
Mechanical Engineering
Rational use of energy: conservation and recovery of energy
seals
title Performance of all-metal demountable cryogenic seals at superfluid helium temperatures
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