Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Patent
1983-06-15
1985-07-02
Scott, Samuel
Valves and valve actuation
Fluid actuated or retarded
Piston type expansible chamber reciprocating valve actuator
251367, 2513353, F16K 4110
Patent
active
045263418
ABSTRACT:
A valve body includes a chamber for the flow of fluid between an inlet and an outlet thereto. The chamber includes an upper portion with an opening therethrough and a lower portion including a valve seat between the inlet and outlet. A bonnet is positioned in the chamber upper portion and is connected to the valve body and extends upwardly therefrom. The bonnet includes a passageway, and a stem is positioned in the passageway for longitudinal movement into and out of sealing relation with the valve seat. An air operator is connected to the upper end of the stem and is connected to a source of fluid under pressure, such as compressed air, which is supplied by remote control to the air operator to control reciprocation of the stem to open and close the valve. The air operator includes a base connected to the bonnet in surrounding relation with the stem and positioned in spaced relation with a piston connected to the upper end of the stem to thereby form a fluid chamber. A housing encloses the piston and the base. Pressurized air is admitted and released to and from the chamber for reciprocating the piston to open and close the valve. A compression spring acts on the stem to normally maintain the valve closed. Supplying compressed air to the chamber exerts an upward force on the piston to raise the stem and compress the spring to open the valve. Sliding seal means is provided on the piston for maintaining a seal between the piston and housing as the piston is reciprocated. The housing is rotatably supported on the base to permit selective positioning of the passageway to accommodate connection of the air operator to a source of compressed air.
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Adams John M.
Kerotest Manufacturing Corp.
Odar Helen Ann
Price, Jr,. Stanley J.
Scott Samuel
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