Abstract: Example aspects of an anti-shock check valve, a valve assembly, and a method for adjusting an anti-shock check valve are disclosed. The anti-shock check valve can comprise a valve body, the valve body defining a cavity, the cavity defining an inlet end an outlet end; a seat positioned within the cavity; and a shaft assembly positioned within the cavity, the shaft assembly comprising a shaft, a collar, and a spring, the collar selectively repositionable along the shaft to adjust a maximum allowable extension length of the spring.

Abstract: A top cap for a valve includes an upper surface; and a lower surface distal from the upper surface; wherein the upper surface and the lower surface of the top cap define a bore and a bore axis, the bore extending from the upper surface to the lower surface, the top cap defining: a minor bore of the bore, the minor bore intersecting the upper surface and defining a minor bore diameter; and a major bore of the bore, the major bore intersecting the lower surface and defining a major bore diameter, the major bore diameter greater than the minor bore diameter, the top cap including a bore shoulder, the bore shoulder defining a bore shoulder surface extending from the minor bore to the major bore, the bore shoulder surface angled with respect to the bore axis of the top cap.

Abstract: A plug valve includes a valve body defining an inlet, an outlet, an interior surface, and an interior cavity extending from the inlet to the outlet, the interior surface defining the interior cavity, the interior surface including a seat proximate to a one of the inlet and the outlet, the seat defining a seat surface; and a valve plug positioned inside the interior cavity and configured to rotate inside the interior cavity between an open position of the valve and a closed position of the valve, the valve plug including a ridge, the ridge defining a radially outermost portion of the valve plug with respect to the axis of the valve, the valve plug contacting the seat of the valve body in the closed position of the valve.

Abstract: A bonded seat for a butterfly valve can comprise a first axial end and a second axial end distal from the first axial end; a central section between the first axial end and the second axial end, the central section defining a radially inward surface and a radially outward surface, the radially inward surface defining a fluid bore therethrough from the first axial end to the second axial end, the radially outward surface defining a plurality of annular ribs.

Abstract: Example aspects of an anti-shock check valve, a valve assembly, and a method for adjusting an anti-shock check valve are disclosed. The anti-shock check valve can comprise a valve body, the valve body defining a cavity, the cavity defining an inlet end an outlet end; a seat positioned within the cavity; and a shaft assembly positioned within the cavity, the shaft assembly comprising a shaft, a collar, and a spring, the collar selectively repositionable along the shaft to adjust a maximum allowable extension length of the spring.

Abstract: A plug valve includes a valve body defining an inlet, an outlet, an interior surface, and an interior cavity extending from the inlet to the outlet, the interior surface defining the interior cavity, the interior surface including a seat proximate to a one of the inlet and the outlet, the seat defining a seat surface; and a valve plug positioned inside the interior cavity and configured to rotate inside the interior cavity between an open position of the valve and a closed position of the valve, the valve plug including a ridge, the ridge defining a radially outermost portion of the valve plug with respect to the axis of the valve, the valve plug contacting the seat of the valve body in the closed position of the valve.

Abstract: A valve includes: a valve body defining a shaft bore therethrough, an axis of the shaft bore defining a vertical axis; a valve shaft positioned within and configured to rotate within the valve body; a valve disc coupled to the valve shaft and positioned within the valve body, the valve disc configured to rotate within the valve body between an open position and a closed position; and a valve seat positioned within the valve body, the valve seat including an outer surface in contact with the valve body and an inner surface in contact with the valve disc, the inner surface of the valve seat defining a sealing ridge extending radially inward with respect to the vertical axis, the sealing ridge having an annular shape about the valve shaft, the sealing ridge concentric with the valve shaft.

Abstract: A top cap for a valve includes an upper surface; and a lower surface distal from the upper surface; wherein the upper surface and the lower surface of the top cap define a bore and a bore axis, the bore extending from the upper surface to the lower surface, the top cap defining: a minor bore of the bore, the minor bore intersecting the upper surface and defining a minor bore diameter; and a major bore of the bore, the major bore intersecting the lower surface and defining a major bore diameter, the major bore diameter greater than the minor bore diameter, the top cap including a bore shoulder, the bore shoulder defining a bore shoulder surface extending from the minor bore to the major bore, the bore shoulder surface angled with respect to the bore axis of the top cap.

Abstract: A bonded seat for a butterfly valve can comprise a first axial end and a second axial end distal from the first axial end; a central section between the first axial end and the second axial end, the central section defining a radially inward surface and a radially outward surface, the radially inward surface defining a fluid bore therethrough from the first axial end to the second axial end, the radially outward surface defining a plurality of annular ribs.

Abstract: A valve includes an annular body defining a body bore. An annular valve seat is positioned in the body bore and an annular groove is defined in a portion of the annular sealing surface. A rotatable valve element is positioned in the body bore. With the valve element in a closed and an unpressurized condition, the annular groove is deformed and a first groove gap is defined in the annular groove adjacent to the first disc face and a second groove gap is defined in the annular groove adjacent to the second disc face. With the valve element closed and in a pressurized condition, the annular groove is deformed and a third groove gap is defined in the annular groove adjacent to the first disc face. A volume of the third groove gap is greater than a volume of the first groove gap and second groove gap.

Abstract: A valve includes: a valve body defining a shaft bore therethrough, the shaft bore defining an axis extending through the valve body; a valve shaft positioned within and configured to rotate within the shaft bore of the valve body, the valve shaft including a shaft shoulder defining a shaft shoulder surface facing upward; a top cap secured to the valve body, the top cap including a bore shoulder defining a bore shoulder surface facing downward, the bore shoulder surface facing the shaft shoulder surface; and a seal positioned between the top cap and the valve body, the seal configured to seal against leakage from between the valve body and the valve shaft.

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 includes: a valve body defining a shaft bore therethrough, the shaft bore defining an axis extending through the valve body; a valve shaft positioned within and configured to rotate within the shaft bore of the valve body, the valve shaft including a shaft shoulder defining a shaft shoulder surface facing upward; a top cap secured to the valve body, the top cap including a bore shoulder defining a bore shoulder surface facing downward, the bore shoulder surface facing the shaft shoulder surface; and a seal positioned between the top cap and the valve body, the seal configured to seal against leakage from between the valve body and the valve shaft.

Abstract: A valve includes an annular body defining a body bore. An annular valve seat is positioned in the body bore and an annular groove is defined in a portion of the annular sealing surface. A rotatable valve element is positioned in the body bore. With the valve element in a closed and an unpressurized condition, the annular groove is deformed and a first groove gap is defined in the annular groove adjacent to the first disc face and a second groove gap is defined in the annular groove adjacent to the second disc face. With the valve element closed and in a pressurized condition, the annular groove is deformed and a third groove gap is defined in the annular groove adjacent to the first disc face. A volume of the third groove gap is greater than a volume of the first groove gap and second groove gap.

Abstract: A valve assembly can include a valve body, a seat, and a seat cover. In one aspect, the valve body can include an inner surface and an outer surface. The inner surface can define a body bore and a valve body groove having a bottom groove surface. The seat can include an inner surface defining a seat bore and an outer surface defining a seat alignment rib configured to be positioned in the valve body groove. In one aspect, the valve body groove can define a deformation gap between the bottom groove surface and an outer surface of the seat alignment rib. The seat cover can include an inner surface defining a seat cover bore. In one aspect, the seat cover can be mounted on the seat with an outer surface of the seat cover facing the inner surface of the seat.

Abstract: A valve includes: a valve body defining a shaft bore therethrough, an axis of the shaft bore defining a vertical axis; a valve shaft positioned within and configured to rotate within the valve body; a valve disc coupled to the valve shaft and positioned within the valve body, the valve disc configured to rotate within the valve body between an open position and a closed position; and a valve seat positioned within the valve body, the valve seat including an outer surface in contact with the valve body and an inner surface in contact with the valve disc, the inner surface of the valve seat defining a sealing ridge extending radially inward with respect to the vertical axis, the sealing ridge having an annular shape about the valve shaft, the sealing ridge concentric with 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.