SEALS FOR 12,500 PSIG AIR SYSTEMS

SEALS FOR 12,500 PSIG AIR SYSTEMS

The ability of Viton B O-rings to seal 12,500 psig nitrogen pressure was evaluated under dy namic and static simulated service conditions using spiral Teflon back-up rings. The static O-ring seals in the three test devices used leaked badly after 15-1/2, 19, and 46-1/2 hours, respectively, under pre...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Bourn, W S, Holloway, J M, Barrett, A E
Format: Report
Sprache:eng
Schlagworte:
Adhesives, Seals and Binders
BACKUP SYSTEMS
HIGH PRESSURE
LEAKAGE(FLUID)
NITROGEN
O RINGS
RUBBER
SEALS(STOPPERS)
TETRAFLUOROETHYLENE RESINS
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Beschreibung
Zusammenfassung:The ability of Viton B O-rings to seal 12,500 psig nitrogen pressure was evaluated under dy namic and static simulated service conditions using spiral Teflon back-up rings. The static O-ring seals in the three test devices used leaked badly after 15-1/2, 19, and 46-1/2 hours, respectively, under pressure. Examination of the O-rings after test showed that their surfaces were permanently distorted in the area which contacted the back-up rings at and between the ends of the spiral. No other irregularities or evidences of extrusion were observed on the O ring surfaces. The leakage may have been due to the distortion of the O-ring surface caused by the use of the spiral back-up rings. Swell of the O-rings due to dissolving of nitrogen gas in the rubber was only 4.4% measured after 4 days exposure to 12,500 psig nitrogen pressure, and no blisters were observed in the O-rings after this test.