Pneumatic butterfly valve
AssigneeHamilton Sundstrand Corporation
InventorsJosh Kamp, Jay Stradinger, Bruce R. Schroder, Peter J. Dowd
Life of this patent
Estimating the term…
Abstract
A butterfly valve includes a duct defining a flow pathway and a valve disc rotably disposed in the flow pathway. A pneumatic actuator includes an intermediate chamber housing an actuator piston and is operably connected to the valve disc to drive rotation of the valve disc. A downstream bleed conduit extends from the flow pathway downstream of the valve disc to the intermediate chamber to pressurize the intermediate chamber thereby reducing a rate of movement of the valve disc in the flow pathway.
Claims17
A butterfly valve comprising:
- a duct defining a flow pathway;
- a valve disc rotably disposed in the flow pathway;
- a pneumatic actuator including an intermediate chamber housing an actuator piston, the pneumatic actuator operably connected to the valve disc to drive rotation of the valve disc;
- and
- a downstream bleed conduit extending from the flow pathway downstream of the valve disc to the intermediate chamber to pressurize the intermediate chamber thereby reducing a rate of movement of the valve disc in the flow pathway.
A method of operating a butterfly valve comprising:
- pressurizing a pneumatic actuator by flowing air from a pneumatic source;
- translating a piston of the pneumatic actuator via the pressurization;
- rotating a valve disc operably connected to the piston and disposed in a flow pathway by the translation of the piston;
- bleeding a flow of air from the flow pathway downstream of the valve disc to an intermediate chamber of the pneumatic actuator;
- and
- pressurizing the intermediate chamber via the flow of air from the flow pathway to reduce a rate of movement of the valve disc in the flow pathway.
Dependencies are inferred from the claim text.