Closures Bridgman

Bridgman Closure The Bridgman Closure is an Axial type of gasket as opposed to a radial type. The pressure reacts on the exposed gasket area in an axial rather than a radial direction. These are generally only considered above 1500 PSI. 

Heads may also be what is known as an end plug such as is used in Bridgman closures and flireaded closures. The end plug is peculiar to fliese designs and the design of these is handled in their respective sections. 

The Bridgman closure can be used in either the bolted or threaded versions. The threaded version utilizes a main... 

Figure 8-16. Exploded view of typical Bridgman closure.

Figure 8-23. Simple threaded type closure with a Bridgman closure.

Modified Bridgman Unlimited 12-48 Gasket Matl Long finishes flanged or threaded closure... 

This is one of the first self-sealing joints based on die unsupported area principle. This joint was developed by Dr. P.W. Bridgman who was the auflior of the book, The Physics of High Pressure , published in 1931. This type of sealing configuration has been used many times since 1929 and is highly reliable. Pressures up to 100,000 PSI have been achieved for small closures and pressures in the range of 25,000 PSI are readily available. 

Figure 8-14. Bridgman type closures (A) Threaded plug type (B) Floating head type for large diameter heads (C) Modified type using rings to prevent extrusion of the gasket (D) Studded outlet with floating head.

From a design standpoint, the total hydrostatic end force, H, is taken by the threads in a threaded closure, or by the studs in other designs. Various types of gaskets can be used with either design but all are the self-sealing type such as Bridgman, delta or double cone. 

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