Abstract: A valve design including a valve body comprising an aperture through the body is disclosed. The valve includes a shaft secured to a disc with a clamping connection.

Abstract: The present disclosure relates to valve lockout systems, including valve lockout systems for use with an actuator and butterfly valves. The lockout system allows controlled access to operation of the valve, either to prevent intentional or unintentional operation of the valve. Thus, the lockout system prevents the unauthorized opening or closing of the valve. The lockout system includes a lockout plate in which a lockout bar is positioned. The lockout bar includes a surface containing a recess. Depending upon the location of the recess the valve shaft can be opened or closed.

Abstract: A knife gate valve with an interior channel divided by an interior channel configured to receive a valve gate, the valve gate can travel along the interior channel. A removable first wear ring is disposed on the upstream side of the interior channel, the first wear ring substantially lining the upstream side of the interior channel; and a removable second wear ring disposed on the downstream side of the interior channel, the second wear ring substantially lining the downstream side of the interior channel; a first retainer ring adjacent to the gate on the upstream side of the valve; and a second retainer ring adjacent to the gate on the downstream side of the valve is disclosed. Other embodiments are also shown.

Abstract: A surge relief angle valve (SRA) is disclosed. The surge relief angle valve is held normally-closed by one or more compression spring(s). In certain embodiments the surge relief angle valve includes a body containing a disc and disc seat; a piston and shaft, the piston and shaft in communication with the disc and disc seat; and a spring providing a force against the piston; wherein the spring is enclosed within a housing and wherein the surge relief valve has a closed self-contained hydraulic system containing the piston and shaft, and providing a dampening force against the spring force.

Abstract: A sealing member is described including a surface contacting a valve body that is at least a portion of a sphere.

Abstract: The present disclosure is directed to a combination air valve that uses buoyancy to lift seals into place, preventing media from escaping from the valve. Once the seals are in place, pipeline pressure is used to open and close the valve. The combination air valve includes a low flow vent configured with a pressure equalizing configuration allowing for reduced extrusion forces along the low flow vent, allowing vertical movement of a float shaft at high valve gas pressures with reduced forces.

Abstract: Embodiments include a check valve that comprises a valve body defining an inlet port and an outlet port; a disc disposed within the valve body, wherein the disc is coupled to a pivot shaft and the pivot shaft is coupled to the valve body; a lever arm coupled to the disc, wherein when the disc rotates the lever arm rotates; an actuator shaft couple to a motor, and a first interference element coupled to the actuator shaft, wherein the lever arm contacts the first interference element when the disc is in a maximum open position; wherein when the motor rotates the actuator shaft moves longitudinally along its axis to move the first interference element thereby changing the maximum open position. Other embodiments are also included herein.

Abstract: Embodiments of the invention include a knife gate valve. The knife gate valve can include: a valve body that defines a center aperture, the valve body configured to be coupled to a conduit; a gate disposed at least partially within the valve body, the gate configured to move vertically in relation to the valve body; a seat disposed in a portion of the valve body, the seat comprising a first end and a second end; and a packing area disposed within the valve body, wherein the packing area comprises a packing element is disposed around a portion of the gate; wherein the first end of the seat and the second end of the seat terminate within the valve body between a middle of the center aperture and the packing area. Other embodiments are also included herein.

Abstract: The present disclosure is directed to a combination air valve that uses buoyancy to lift seals into place, preventing media from escaping from the valve. Once the seals are in place, pipeline pressure is used to open and close the valve. The combination air valve includes a piston assembly which includes a main disc, a piston head located above the main disc, a float below the main disc, and a float shaft joining the float to the piston. When no media is in the valve the float is at the bottom of the valve and the main disc is down, allowing gases to leave the valve. The float is lifted as media enters the valve, thus using buoyancy to lift the main disc into place, preventing media from escaping from the valve. Once the seals are in place, pipeline pressure is used to open and close the valve.

Abstract: A sealing member is described including a surface contacting a valve body that is at least a portion of a sphere.

Abstract: The present disclosure is directed to a combination air valve that uses buoyancy to lift seals into place, preventing media from escaping from the valve. Once the seals are in place, pipeline pressure is used to open and close the valve. The combination air valve includes a piston assembly which includes a main disc, a piston head located above the main disc, a float below the main disc, and a float shaft joining the float to the piston. When no media is in the valve the float is at the bottom of the valve and the main disc is down, allowing gases to leave the valve. The float is lifted as media enters the valve, thus using buoyancy to lift the main disc into place, preventing media from escaping from the valve. Once the seals are in place, pipeline pressure is used to open and close the valve.

Abstract: Valves having removable interior wear rings in which the wear ring comprises a high-hardness metal ring, the high hardness metal ring having an exterior surface configured to engage the body of gate valve. A polymeric overlay covers at least a portion of the exterior surface of the metal ring, the polymeric overlay forming the final dimensional shape of the wear ring.

Abstract: Gate valves having removable interior wear rings that are easily removed from one side of the gate valve upon removal of a retainer ring. The retainer ring is held in place within the valve housing by combination of compressive and shear forces.

Abstract: The resilient seated butterfly valve has a common spherical center for receiving either an on-center or off-center disc, both of which are rotatably mounted in the body. A seal has a seat spherical surface. The seal is affixed to the circumference of the valve chamber. It has an on-center seal region for engagement with the on-center spherical sealing edge of the on-center disc. The seal has an off-center seal region for engagement with the off-center spherical sealing edge of the off-center disc. The seal may include an outlet flange, an outlet ramp, an inlet ramp, and an inlet flange. The front face of the seal for the off-center disc extends beyond the position of the front face of the seal for the on-center disc.

Abstract: An apparatus is provided that in some embodiments provide an improved plug valve having a plug with a curved cylindrical sealing surface and a substantially flat second surface. An inlet region of the housing has a constant cross-sectional flow area.

Abstract: A plug valve having an entry region, a chamber, and an outlet region, each with a flow area that is equal to or greater than the flow area of, for example, a standard wall ANSI B 36.10 (M) pipe connected to the inlet and outlet flanges of the valve. The valve's plug has a cylindrical front sealing face and a planar rear face. The axis of the sealing face is parallel to, but off-set from the axis of the plug. When the valve is fully open the planar rear face allows unimpeded flow through the chamber and substantially reduces friction to the flow. The valve's seat is cylindrical for mating with the cylindrical front sealing face of the plug. The seat has a rectangular outline shape.