Importance

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Abstract

A free floating disc check valve is provided by the present application. The check valve includes a seal disc having an integral truncated torroidal shaped portion. The torroidal shaped portion provides structural rigidity to the seal disc to minimize deflection of the disc under higher differential fluid pressures. The torroidal shaped portion of the disc cooperates with finger-shaped projections inside the valve body to limit lateral displacement of the disc relative to the axial flow of the fluid. The torroidal shaped portion and the flat portion of the disc form a cup shape that creates a hydrodynamic force that assists in moving the disc to an opened or closed position. In one embodiment, the seal disc is made of an elastomeric material that is coated with a dry film lubricant. In another embodiment, the seal disc is made of a low density silicone.

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First Claim