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Angle valve assemblies
consist of an
The poppet closes or opens one of the valve’s body ports.
valve body is a vacuum tight chamber that is screwed, flanged or welded into a larger
vacuum vessel or system.
Reliable vacuum valves were not commercially available until the late 1940s
with the advent of O-ring elastomer seals. The elastomer O-ring was developed during
WWII for use in aircraft hydraulic systems, and was soon thereafter adopted by the
vacuum community as the standard means of making vacuum seals. Prior to this it was
common practice, even in large research establishments, to upgrade general service
valves for vacuum use by winding actuator shaft gaskets from string soaked in an
MDC angle and inline valves are offered in various sizes ranging from .25" to 10" port
diameters. Standard port mounts include:
All dimensions in this catalog are given in
inches unless specified otherwise.
MDC Vacuum Products,
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