Abstract: A valve includes a valve body defining a top end, a bottom end distal from the top end, and a shaft bore defined in the top end and the bottom end; a valve shaft positioned at least partially within the shaft bore of the valve body and defining an end bore; and a shaft blowout prevention fastener secured within the end bore of the valve shaft.

Abstract: A valve seat includes an annular sealing surface comprising a rubber-lubricant mixture; and a seat body. A valve includes a valve body; a valve element disposed within the valve body; and a valve seat comprising a rubber-lubricant mixture, the valve element configured to seal against the valve seat. A method for forming a valve seat includes mixing a raw rubber with a lubricant to form a rubber-lubricant mixture; placing the rubber-lubricant mixture into a mold configured to form a valve seat; and curing the rubber-lubricant mixture.

Abstract: A check valve including a valve body and a flapper assembly, the valve body defining an inlet, an outlet, an interior cavity, and a port in the interior cavity; the flapper assembly movable between an open position, providing fluid communication between the inlet and outlet, and a closed position, isolating the inlet from the outlet, the flapper assembly including a resilient body and a spring assembly, the spring assembly configured to bias the flap portion of the resilient body towards the closed position, the spring assembly including a spring and a backing plate mounted on opposite surfaces of the resilient body and configured to increase the stiffness of the intermediate portion of the resilient body.

Abstract: A valve seat device including a valve seat and a seat stiffener, the seat stiffener formed from a non-elastomeric material and positioned on a radially outward-facing surface of the valve seat, an outer diameter of the radially outward-facing surface of the valve seat being greater than an inner diameter of the seat stiffener.

Abstract: A mechanical joint includes a main body having an interior surface, an exterior surface, an inlet end, and an outlet end, the interior surface defining a fluid path from the inlet end to the outlet end, the interior surface defining a pipe seat proximate to a one of the inlet end and the outlet end, the pipe seat having a pipe seat stop surface facing towards the one of the inlet end and the outlet end; and a lining engaging the interior surface and covering at least a portion of the pipe seat stop surface of the pipe seat.

Abstract: A valve includes a valve body defining a top end, a bottom end distal from the top end, and a shaft bore defined in the top end and the bottom end; a valve shaft positioned at least partially within the shaft bore of the valve body and defining an end bore; and a shaft blowout prevention fastener secured within the end bore of the valve shaft.

Abstract: A check valve including a valve body and a flapper assembly, the valve body defining an inlet, an outlet, an interior cavity, and a port in the interior cavity; the flapper assembly movable between an open position, providing fluid communication between the inlet and outlet, and a closed position, isolating the inlet from the outlet, the flapper assembly including a resilient body and a spring assembly, the spring assembly configured to bias the flap portion of the resilient body towards the closed position, the spring assembly including a spring and a backing plate mounted on opposite surfaces of the resilient body and configured to increase the stiffness of the intermediate portion of the resilient body.

Abstract: A check valve including a valve body and a flapper assembly, the valve body defining an inlet, an outlet, an interior cavity, and a port in the interior cavity; the flapper assembly movable between an open position, providing fluid communication between the inlet and outlet, and a closed position, isolating the inlet from the outlet, the flapper assembly including a resilient body and a spring assembly, the spring assembly configured to bias the flap portion of the resilient body towards the closed position, the spring assembly including a spring and a backing plate mounted on opposite surfaces of the resilient body and configured to increase the stiffness of the intermediate portion of the resilient body.

Abstract: A check valve including a valve body and a flapper assembly, the valve body defining an inlet, an outlet, an interior cavity, and a port in the interior cavity; the flapper assembly movable between an open position, providing fluid communication between the inlet and outlet, and a closed position, isolating the inlet from the outlet, the flapper assembly including a resilient body and a spring assembly, the spring assembly configured to bias the flap portion of the resilient body towards the closed position, the spring assembly including a spring and a backing plate mounted on opposite surfaces of the resilient body and configured to increase the stiffness of the intermediate portion of the resilient body.

Abstract: A valve seat device including a valve seat and a seat stiffener, the seat stiffener formed from a non-elastomeric material and positioned on a radially outward-facing surface of the valve seat, an outer diameter of the radially outward-facing surface of the valve seat being greater than an inner diameter of the seat stiffener.

Abstract: A mechanical joint includes a main body having an interior surface, an exterior surface, an inlet end, and an outlet end, the interior surface defining a fluid path from the inlet end to the outlet end, the interior surface defining a pipe seat proximate to a one of the inlet end and the outlet end, the pipe seat having a pipe seat stop surface facing towards the one of the inlet end and the outlet end; and a lining engaging the interior surface and covering at least a portion of the pipe seat stop surface of the pipe seat.