Large metal ring seal prevents gas leakage in hydrogen, helium, or nitrogen storage bottles at pressures up to 5,000 psi. The grooved ring seal which contains elastomer O-rings is installed between the mating faces of the access cover and the storage bottle

Middelkoop, J. H.

English

NASA Technical Reports Server

September 1966	 Brief 66-10422 
NASA TECH BRIEF 
NASA Tech Briefs are issued to summarize specific innovations derived from the U. S. space 
program and to encourage their commercial application. Copies are available to the public from 
the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Large Diameter Metal Ring Seal Prevents Gas Leakage at 5000 psi 
The problem: 
To provide large diameter seals (approximately 18 
inches) for hydrogen, helium, or nitrogen storage 
bottles, at pressures up to 5,000 psi. Previously, large 
diameter 0-rings have not been satisfactory in high 
pressure applications because the expansion of the 
sealing surfaces allows the 0-ring to extrude and 
rupture. 
The solution: 
Install a grooved metal ring seal containing elas-
tomer 0-rings between the mating faces of the access 
cover and the storage bottle.
How it's done: 
A grooved metal ring seal containing elastomer 
0-rings is installed between the mating faces of the 
access cover and the storage bottle. As the access 
cover is tightened, the metal ring and the 0-rings are 
compressed, forcing the 0-rings to be extruded from 
the grooves and make contact with the mating faces 
of the access cover and storage bottle. 
Notes: 
1. This sealing technique can be readily used in the 
chemical, petroleum, medical supply, and related 
industries where high pressure storage bottles and 
tanks are required.
(continued overleaf) 
MW
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19660000421 2020-03-11T17:36:33+00:00Z
2. Inquiries concerning this invention may be di-
rected to:
Technology Utilization Officer 
Marshall Space Flight Center 
Huntsville, Alabama 35812 
Reference: B66-10422
Patent status: 
Inquiries about obtaining rights for the commercial 
use of this invention may be made to NASA, Code 
GP, Washington, D.C. 20546. 
Source: James H. Middelkoop

of North American Aviation, Inc.

under contract to

Marshall Space Flight Center

(M-FS- 1064) 
Brief 66-10422
	 Category 5


Large diameter metal ring seal prevents gas leakage at 5000 psi

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