High pressure inverted bellows valve

Details High pressure inverted bellows valve High pressure inverted bellows valve

1985-05-17

1987-01-06

Chambers, A. Michael

Valves and valve actuation

Hermetic flexible wall seal for actuator

Bellows

251 86, 251 636, 251214, 251291, F16K 3100

Patent

active

046340998

ABSTRACT:
An inverted bellows valve has a two-piece stem interconnecting the valve and actuator for reciprocating axial movement of the stem tip. Tapered surfaces are advantageously utilized between cooperating elements for self-centering the valve assembly. An annular gland disposed along the exterior of the valve stem has concentric inner and outer O-rings which permit the stem to float and compensate for misalignment. A wobble collar is also disposed in abutting engagement with the stem to compensate for uneven spring forces which could otherwise cock the stem. The bellows subassembly is removable in one piece to facilitate maintenance and replacement.

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