Butterfly check valve
AssigneeAGF Manufacturing, Inc.
InventorsBentley F. Gleeson, George J. McHugh, IV, James P. McHugh
Life of this patent
Estimating the term…
Abstract
A butterfly check valve is disclosed, which includes a housing defining an interior chamber having an inlet and an outlet; a control valve configured to control a flow between the inlet and the outlet, the control valve including a valve member movable to an open position in which a flow is permitted between the inlet and the outlet and a closed position in which the flow is blocked between the inlet and the outlet; and a check valve arranged downstream of the control valve, the check valve including a dome-shaped clapper configured to seal against an outer periphery of a clapper seat within the interior chamber of the housing in a reverse flow from the outlet to the inlet.
Claims19
A butterfly check valve, comprising:
- a housing defining an interior chamber having an inlet and an outlet;
- a control valve configured to control a flow between the inlet and the outlet, the control valve including a disk-shaped valve member movable to an open position in which a flow is permitted between the inlet and the outlet and a closed position in which the flow is blocked between the inlet and the outlet;
- a check valve arranged immediately downstream of the control valve, the check valve including a dome-shaped clapper configured to seal against an outer periphery of a clapper seat within the interior chamber of the housing in a reverse flow from the outlet to the inlet;
- and
- wherein the dome-shaped clapper is configured to allow the disk-shaped valve member of the control valve to rotate within the dome-shaped clapper when the control valve is actuated between the open position and the closed position.
A butterfly check valve, comprising:
- a housing defining an interior chamber having an inlet and an outlet;
- a control valve configured to control a flow between the inlet and the outlet, the control valve including a disk-shaped valve member movable to an open position in which a flow is permitted between the inlet and the outlet and a closed position in which the flow is blocked between the inlet and the outlet;
- a check valve arranged immediately downstream of the control valve, the check valve including a dome-shaped clapper configured to seal against an outer periphery of a clapper seat within the interior chamber of the housing in a reverse flow from the outlet to the inlet, the dome-shaped clapper being a spring-loaded clapper configured to rotate upward upon the flow being permitted between the inlet and the outlet of the housing;
- and
- wherein the dome-shaped clapper is configured to allow the disk-shaped valve member of the control valve to rotate within the dome-shaped clapper when the control valve is actuated between the open position and the closed position.
Dependencies are inferred from the claim text.