Check valve

摘要

A check valve is provided which may be installed horizontally or in other non-vertical orientations, and used with variable frequency drives and other applications without the valve disk becoming misaligned. In one aspect, the valve provides a housing with an inner surface and a passage, a flange within the housing which divides the housing into upstream and downstream portions, and extending around the inner surface, defining a valve seat and a valve aperture, a poppet positioned in the downstream portion, including a valve disk and a valve stem extending from the valve disk, the valve disk engaging the valve seat, being moveable, and being resiliently biased in the closed position against the valve seat to inhibit fluid flow in a first direction, and a guide removably mounted on the inner surface of the housing, the guide receiving the valve stem of the poppet valve as the poppet valve moves.

主权项

1. A valve, said valve comprising:
a housing including an inner periphery surface defining a passage therethrough; a flange within said housing dividing the passage into an upstream portion and a downstream portion, said flange defining a valve seat and having an inner surface defining a valve aperture; a poppet valve positioned in the downstream portion of the passage of said housing, said poppet valve including a valve disk and a valve stem extending from the valve disk towards the downstream portion of the passage, the valve disk engaging the valve seat of said flange and moveable between a fully closed position to a fully open position, the valve disk being resiliently biased in the fully closed position against the valve seat by a resilient member to inhibit fluid flow between the upstream and downstream portions of the housing; and a guide, said guide comprising a sleeve engaging the valve stem of said poppet valve as said valve disk moves between the fully closed position and the fully open position, said guide further comprising support arms extending radially from the sleeve, the support arms mounted to the inner periphery surface of said housing, wherein the valve disk forms a chamber having an opening for receiving and retaining a seal and a recessed side substantially opposing the opening, a portion of the seal exposed by the opening of the chamber contacts the valve seat when said poppet valve is in the fully closed position, wherein the resilient member is pre-loaded to an extent such that the valve disk is normally resiliently biased into the fully closed position with an outer peripheral portion of the seal deformed into the chamber in a first direction extending toward the valve stem and into abutment with the recessed side of the chamber via contact with a portion of the valve seat adjacent the inner surface of the flange that defines the valve aperture, wherein a first side of the chamber extends about an outer periphery surface of the outer peripheral portion of the seal that at least generally faces away from the valve stem and toward the inner periphery surface of the housing to prevent the seal from expanding radially outward toward the inner periphery surface of said housing when said valve disk is resiliently biased in the fully closed position, and wherein, in the fully closed position of the valve disk, the portion of the valve disk forming the first side of the chamber engages the valve seat of the flange to close off the seal and the chamber from the downstream portion of the housing.