Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Patent
1974-11-18
1976-09-28
Schwadron, Martin P.
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
251335A, 277108, F16K 3144
Patent
active
039827291
ABSTRACT:
The diaphragm valve has a valve body portion with a chamber therein. The chamber has an open top portion and an inlet and outlet communicating therewith. The valve body has a valve seat in the chamber. The valve member is positioned in overlying relation with the valve seat and is arranged to control the flow of fluid through the chamber. A yoke member connected to the valve body within the upper portion of the valve chamber has an axial passageway therethrough. A bonnet having a passageway therethrough is coaxially aligned within the yoke member. A valve stem is arranged for reciprocal movement within the yoke member and bonnet passageway. A diaphragm assembly is positioned within the valve chamber between the valve stem and the valve member. A spring urges the valve member upwardly against the underside of the diaphragm assembly to open the valve. A packing ring surrounds the valve stem and is positioned within an annular recessed portion of the bonnet passageway. A follower member surrounds the valve stem and overlies the packing ring in the recessed portion. A bearing plate surrounding the valve stem in the yoke member passageway abuts the top portion of the follower member. Bolt means threadably engaged within bores of the yoke member abut the bearing plate and apply preselected compressive forces thereto. The compressive forces are transmitted from the bearing plate through the follower to the packing ring to thereby maintain a fluid and pressure tight seal between the bonnet and the valve stem in the bonnet passageway. The yoke member, together with the packing ring, follower member and the bearing plate prevent the expulsion of broken valve components out of the valve in the event of excessive pressure build-up within the valve chamber.
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Brochure - ITT Grinnell - Diaphragm Valves for Nuclear Services, Grinnell Valve Division, 225 N. Front St., Wrightsville, Pa. 17638.
Kerotest Manufacturing Corporation
Price, Jr,. Stanley J.
Schwadron Martin P.
Walton G.
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