Patent
Rotary pneumatic damper for check valve
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TLDR
In this article, a damping system for a valve with a flapper comprises a main body having at least an inner wall defining a pneumatic chamber, a paddle disposed within the PNE, and a plurality of orifices extending through the main body.Abstract:
A damping system for a valve with a flapper comprises a main body having at least an inner wall defining a pneumatic chamber, a paddle disposed within the pneumatic chamber, and a plurality of orifices extending through the main body. The paddle is coupled to the flapper and moved thereby between a first position and a second position when the flapper is in a closed and an open position, respectively, and is configured to force gas out of the pneumatic chamber when moving to the first position or the second position. The plurality of orifices allow gas egress out of the pneumatic chamber at least at a first egress rate when the paddle moves from the first position to an intermediate position between the first and second positions, and at least at a second, lower egress rate when the paddle moves from the intermediate position to the second position.read more
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