Abstract: A check valve which includes a valve body having an inlet end, an outlet end and a flow bore that extends between the inlet and outlet ends; a valve seat which is positioned across the flow bore; and a flapper which is configured to seal against the valve seat. The flapper is connected to or formed integrally with a pivot pin and is pivotable between a closed position in which the flapper is positioned against the valve seat and an open position in which the flapper is displaced from the valve seat. The pivot pin has opposite first and second ends, each of which is supported in a corresponding resilient bushing which is supported in the valve body. The resilient bushings allow the flapper to better align with the valve seat when the flapper is in the closed position.

Abstract: Swing valves have a passage and a sleeve. The passage has a receptacle, and the sleeve is pressure fitted into the receptacle. The sleeve is adapted to conduct flow through the valve and comprises a first end, a second end, and a valve seat. The first end of the sleeve is pressure fitted into the receptacle. The second end projects out of the receptacle. The valve seat is on the face of the second sleeve end. The second sleeve end also is adapted to couple with a sleeve cap extending over and across the second sleeve end to shut off flow through the sleeve.

Abstract: A clapper comprises a first valve body piece, a second valve body piece, wherein the second valve body piece is separate from the first valve body piece, and a seal. The first valve body piece has a seal groove. The second valve body piece has an angled edge. The seal is disposed in the seal groove of the first valve body piece. When the first and second valve body pieces are coupled together, radial compression of the seal between the seal groove and the angled edge causes the seal to be retained within the clapper.

Abstract: A plurality of bypass lines are configured to selectively engage a corresponding plurality of food flow paths in a food processor. Each bypass line fluidly communicates with an inlet of a pressure regulating valve such that a common pressure occurs at a spaced position in each food flow path providing an equal pressure at the pressure regulating valve.

Abstract: Embodiments relate to a check valve and methods of making a check valve that include a valve body having an inlet end, an outlet end, a flow bore that extends between the inlet and outlet ends, a cavity which intersects the flow bore, and an opening which is connected to the cavity.

Abstract: A check valve for a fluid distribution system can include a valve body defining a valve bore defining a cylindrical shape, the valve body comprising an annular body and a fixed cross member secured to the valve body and extending across the valve bore, a position block secured to the cross member of the valve body, extending from the cross member, and defining a pivot bore; a pivot pin positioned within the valve body and extending through the pivot bore of the position block, the pivot pin positioned entirely within the cylindrical shape of the valve bore; and a valve member positioned within the valve body and configured to rotate about the pivot pin to a closed position when a pipe system termination fitting attached to the valve body is dislocated fr om the valve body or when the fluid moves in a negative flow direction of the check valve.

Abstract: Flapper valves may be provided with flapper assemblies. The flapper assemblies comprise a bracket, a flapper, a bearing, and a pin. The bracket has a pair of knuckles with a bore extending through the knuckles. The flapper has a knuckle with a bore. The bearing is mounted in the flapper knuckle bore and has a bore extending through it. The pin extends through the bores in the bracket knuckles and the bearing bore. The pin and the bracket are locked to each other. Clearance between the pin and the bearing bore allows relative rotation between the flapper and the pin. The flapper thus is mounted to the bracket for pivoting movement between a closed position, in which the flapper is adapted to bear on a seat in the flapper valve, and an open position, in which the flapper is adapted to pivot away from the seat.

Abstract: A sewer back-up prevention device for a recreational vehicle utilizes a T-shaped unit of tubing having a recreational vehicle sewer line hook-up on a first end, a sewer hose hook-up on a second end, and a trap cleanout access point disposed therebetween. Disposed within the T-shaped unit is a one-way flapper valve.

Abstract: A contoured check valve disc features a pivot portion and a check valve portion. The check valve portion is attached to the pivot portion, and has two sides, a first side to respond to the fluid flow in a first direction and move the check valve portion away from a fluid opening to the one or more open positions depending on the fluid flow to allow the fluid to flow through the fluid opening, and a second and opposing side to respond to fluid flow in an opposite direction through the fluid opening and move the check valve portion towards the fluid opening to the closed position to seal the fluid opening and stop fluid flow.

Abstract: A check valve including a clevis, a hinge pin, a hinge configured to be rotatably coupled to the clevis by the hinge pin, and a disc configured to be detachably coupled to the hinge. The hinge includes a first hinge member having a male interlocking feature and a second hinge member defining a female interlocking feature corresponding to the male interlocking feature. The second hinge member is configured to be detachably coupled to the first hinge member. When the first hinge member is coupled to the second hinge member, the male interlocking feature of the first hinge member is received in the female interlocking feature defined in the second hinge member to prevent angular separation of the first and second hinge members about the hinge pin. The first and second hinge members may define a non-circular opening configured to prevent rotation of the disc relative to the hinge.

Abstract: A clack valve assembly comprising: a valve seat comprising an opening; a bearing comprising a recess with a base, a mouth, and a pair of side walls between the base and the mouth; a lid comprising a lid plate and a shaft, the shaft being received in the recess of the bearing; and a shaft retaining member which closes the mouth of the recess in the bearing, thus retaining the shaft within the recess. The shaft and the lid plate are integrally formed elements of a single part. The shaft can rotate within the recess to enable the lid to rotate from a closed position in which the lid engages the valve seat and covers the opening, to an open position in which the lid lifts away from the valve seat enabling fluid to flow through the opening in the valve seat.

Abstract: The present disclosure is directed to a backwater valve assembly comprising a main valve body, a flapper sub-assembly, and a cap. The main valve body has an inner wall that can define a recess into which the flapper sub-assembly can be removably secured. The flapper sub-assembly includes at least one flapper element that can pivot between an open position, in which the flapper element allows fluid to flow through the backwater valve assembly, and a closed position, in which the flapper element prevents fluid from flowing in the opposite direction. The flapper sub-assembly can be removably coupled to the cap to allow the flapper sub-assembly and cap to be installed in or removed from the main valve body together as a unitary assembly.

Abstract: The invention relates to a check valve for blocking a fluid-carrying line in case of reversal of the flow direction, containing a valve housing defining a flow path and having two connecting pieces and a valve seat therebetween, and a flap module mounted in the valve housing and containing a shut-off body interacting with the valve seat, a bearing device for pivotably supporting the shut-off body such that the latter is movable between an open position and a closed position, and a lever extending between the shut-off body and the bearing device and being connected to the shut-off body and the bearing device. For easier manufacturing, the invention proposes that a part of the flap module is formed by at least one sheet-metal shaped part.

Abstract: A check valve assembly has a body having a central cavity intersected by upstream and downstream flow passages. A seat is secured by a threaded engagement in the upstream flow passage. An access bore intersects the cavity and has a support shoulder formed in it. A holder is supported on the support shoulder. A flapper is pivotally secured to the holder and located in the cavity for movement between an open position and a closed position blocking flow through the seat. A straight edge portion in the access bore engages a straight edge portion of the holder to prevent rotation of the holder. A fastener extends through a hole in the support shoulder into engagement with the seat to prevent rotation of the seat.

Abstract: The present invention aims at simplifying maintenance, mounting and disassembly operations which are required with valves, and in particular with check valves. Thus, the present invention proposes a solution according to which the closing element (101) of the valve is rotatably fixed to the valve cover (200) so that said cover and said closing element can be simultaneously mounted back by means of a single operation.

Abstract: A method for closing a fuel tank includes providing a base sized to be received within an interior of a fuel tank filler neck, movably mounting a closure structure on the base, and securing a biasing mechanism to the base wherein the biasing mechanism biases the closure structure into a closed position on the base.

Abstract: An anchor valve for security is disclosed. The anchor valve includes a check valve with a flapper for preventing a contaminant from entering the fluid supply system. Contaminants that are outboard of the anchor valve are unable to pass by and are expelled when the fluid supply valve is opened. The anchor valve may include an access cover for maintenance and inspection of the flapper and the check valve.

Abstract: A valve (10) is disclosed. The valve (10) has an inclined valve seat (14) defining a fluid aperture (18), and a valve head (20) for contact with the valve seat (14) for closure of the fluid aperture (18). A lever arm (22) is attached to the valve head (20). There are biasing means (32) operatively coupled to the lever (22) arm for urging the valve head (20) into contact with the valve seat (14), the biasing means (32) being arranged to provide decreased biasing on opening of the valve head (20) relative to the fluid aperture (18).

Abstract: A top entry check valve including a valve body with an access port and clapper assembly with a compressible hanger positioned in alignment with the access port. The compressible hanger comprises a plate member stamped from a sheet of metal having at least one dimple formed in one of the upper side and the lower side and a corresponding protuberance formed on an opposing side so as to define a compressible area. A clapper is connected to the hanger so that the clapper is movable between a closed position and an open position. A closure member has an abutment surface engaging the hanger so that the hanger body is compressed between the closure member and the valve body.

Abstract: A passive valve assembly for an exhaust system is mounted within an exhaust tube. The exhaust tube has a bore that defines an exhaust flow path having a cross-sectional area. One end of the exhaust tube is to be connected to a first exhaust component and a second end of the exhaust tube is to be connected to a second exhaust component such that the exhaust tube forms a sole exhaust path between the first and the second exhaust components. The passive valve assembly includes a vane that is mounted within the bore, and which is moveable between an open position and a closed position. A resilient member biases the vane toward the closed position. When the vane is in the closed position, the vane covers 80% to 97% of the cross-sectional area.

Abstract: A check valve assembly has a body having a central cavity intersected by upstream and downstream flow passages. A seat is secured by a threaded engagement in the upstream flow passage. An access bore intersects the cavity and has a support shoulder formed in it. A holder is supported on the support shoulder. A flapper is pivotally secured to the holder and located in the cavity for movement between an open position and a closed position blocking flow through the seat. A straight edge portion in the access bore engages a straight edge portion of the holder to prevent rotation of the holder. A fastener extends through a hole in the support shoulder into engagement with the seat to prevent rotation of the seat.

Abstract: The present invention provides a check valve for use in a vacuum sewage pipe. The check valve includes a body having a sewage inlet and a sewage outlet to be coupled to the vacuum sewage pipe, a flap valve element disposed in the body and rotatably supported by a first shaft, and a closing mechanism. The closing mechanism can keep the flap valve element in a closed state so as to allow the flap valve element to function as a gate valve. The closing mechanism can also limit an opening degree of the flap valve element so as to allow the flap valve element to function as a check valve.

Abstract: A check valve of the flapper type structured for use in a self-primer pump is structured for attachment to the pump casing in a manner that facilitates servicing of the check valve, and includes securement means that are positioned external to the casing and a flapper that is located through an opening of the casing in a manner that enables the servicing of the valve without dropping the flapper or the hardware into the interior of the pump.

Abstract: A check valve of the flapper type structured for use in a self-primer pump is structured for attachment to the pump casing in a manner that facilitates servicing of the check valve, and includes securement means that are positioned external to the casing and a flapper that is located through an opening of the casing in a manner that enables the servicing of the valve without dropping the flapper or the hardware into the interior of the pump.

Abstract: A backwater valve assembly includes a valve housing, a valve member and a servicing tool. The valve housing has an internal ledge within its interior on which is positioned a retainer clip oriented in vertical alignment with a riser. The valve member has a first engagement of a two part engagement on one face and a mounting along a peripheral edge which includes transverse pins adapted to engage the retainer clip. The servicing tool includes a second engagement of the two part engagement at a working end of a shaft. The hook engages the hook receiver of the valve member during insertion and removal.

Abstract: A fire hydrant system relating to protection of a water supply from contamination. The fire hydrant system includes a barrel adapted to communicate at least indirectly with a water supply; a nozzle extending from the barrel; a hydrant valve adapted to controllably regulate communication between the barrel and the water supply; a valve actuator adapted to allow actuation of the hydrant valve; a nozzle cap adapted to at least close off the nozzle opening; and a hydrant shoe in communication with the water supply, the hydrant shoe comprising a backflow prevention assembly, wherein water can flow from the water supply through the hydrant shoe into the barrel at an open position of the backflow prevention assembly disc, and wherein media cannot enter the water supply via the barrel when the backflow prevention assembly disc is in a closed position.

Abstract: A fire hydrant system relating to protection of a water supply from contamination. The fire hydrant system includes a barrel adapted to communicate at least indirectly with a water supply; a nozzle extending from the barrel; a hydrant valve adapted to controllably regulate communication between the barrel and the water supply; a valve actuator adapted to allow actuation of the hydrant valve; a nozzle cap adapted to at least close off the nozzle opening; and a hydrant shoe in communication with the water supply, the hydrant shoe comprising a backflow prevention assembly, wherein water can flow from the water supply through the hydrant shoe into the barrel at an open position of the backflow prevention assembly disc, and wherein media cannot enter the water supply via the barrel when the backflow prevention assembly disc is in a closed position.

Abstract: A top entry check valve including a valve body with an access port. A compressible hanger body engages a portion of the valve body and is positioned in alignment with the access port of the valve body. A clapper is connected to the hanger body so that the clapper is movable between a closed position wherein the clapper engages a valve seat to occlude the passage of fluid through the fluid flow passage and an open position wherein the clapper is moved away from the valve seat to permit passage of fluid through the fluid flow passage. A closure member is connected to the valve body to close the access port of the valve body. The closure member has an abutment surface engaging the hanger body so that the hanger body is compressed between the closure member and the valve body.

Abstract: A top entry check valve including a valve body with an access port. A compressible hanger body engages a portion of the valve body and is positioned in alignment with the access port of the valve body. A clapper is connected to the hanger body so that the clapper is movable between a closed position wherein the clapper engages a valve seat to occlude the passage of fluid through the fluid flow passage and an open position wherein the clapper is moved away from the valve seat to permit passage of fluid through the fluid flow passage. A closure member is connected to the valve body to close the access port of the valve body. The closure member has an abutment surface engaging the hanger body so that the hanger body is compressed between the closure member and the valve body.

Abstract: A swing check valve for controlling fluid flow, including a valve housing having a port for fluid flow therethrough. A valve assembly is disposed within the valve housing for controlling the fluid flow therethrough, and includes a valve seat communicating with the port. A clapper is pivotally mounted in the valve housing and moves between open and closed positions. A lever arm is pivotally mounted on the rocker arm for providing leverage against the rocker arm for positioning the clapper and rocker arm within the valve housing. A spring is captured in the valve housing, and normally urges the clapper into the closed position. A first pivot is carried by the spring for permitting unattached pivotal movement of the spring relative to the cover. A second pivot is carried by the spring for permitting the spring to pivot within the valve housing responsive to movement of the clapper.

Abstract: The present invention relates to a light weight check valve for use in bulk material transfers that incorporates a smooth, generally spherical interior cavity to minimize flow inefficiencies. The check valve is made from two portions: a body portion and a lid assembly which is removably mounted to the body portion. The gate valve, or poppet, is hingedly mounted to the lid assembly. Hence, when the check valve assembly is opened for inspection, by removing the lid assembly, the poppet is removed along with the lid assembly, to allow for easy inspection of the poppet.

Abstract: A check valve has a valve body with an annular seat surrounding the duct and a flap member pivotally mounted on the valve body so as to pivot about an axis transverse to the duct from an open position to a closed position pressing against the seat. The flap member includes a circular flap plate with a rigid backer plate and a front resilient layer carried on a pivot mounting bracket having a rigid mounting plate generally parallel to the backer plate. The backer plate and the mounting plate each have a central hole therethrough and are connected by an integral body molded from a resilient elastomeric material to form the front resilient layer, a back stopper portion and a connecting neck portion arranged so as to provide resilient flexing movement between the flap plate and the mounting bracket. The mounting bracket is carried on a shaft with a pair of coil springs housed in a receptacle separated from the duct so that broken spring parts do not enter the fluid in the housing.

Abstract: A swing check valve for controlling fluid flow, including a valve housing having a port for fluid flow therethrough. A valve assembly is disposed within the valve housing for controlling the fluid flow therethrough, and includes a valve seat communicating with the port. A clapper is pivotally mounted in the valve housing and moves between open and closed positions. A lever arm is pivotally mounted on the rocker arm for providing leverage against the rocker arm for positioning the clapper and rocker arm within the valve housing. A spring is captured in the valve housing, and normally urges the clapper into the closed position. A first pivot is carried by the spring for permitting unattached pivotal movement of the spring relative to the cover. A second pivot is carried by the spring for permitting the spring to pivot within the valve housing responsive to movement of the clapper.

Abstract: A check valve has a valve body with an annular seat surrounding the duct and a flap member pivotally mounted on the valve body so as to pivot about an axis transverse to the duct from an open position to a closed position pressing against the seat. The flap member includes a circular flap plate with a rigid backer plate and a front resilient layer carried on a pivot mounting bracket having a rigid mounting plate generally parallel to the backer plate. The backer plate and the mounting plate each have a central hole therethrough and are connected by an integral body molded from a resilient elastomeric material to form the front resilient layer, a back stopper portion and a connecting neck portion arranged so as to provide resilient flexing movement between the flap plate and the mounting bracket. The mounting bracket is carried on a shaft with a pair of coil springs housed in a receptacle separated from the duct so that broken spring parts do not enter the fluid in the housing.

Abstract: A torsion spring return system for a valve closure member, preferably for downhole use in an SSV, is described. The closure member or flapper uses torsion springs which can be wrapped circumferentially within the body of the downhole tool, generally following the periphery of the flapper. Downward rotation of the flapper stresses the torsion springs so that subsequently, when a flow tube or other device holding the flapper in one position is released, the torsion springs return the flapper to its seat. The connection between the torsion springs and the pin supporting the flapper is either a universal joint or involves an alignment rod running through the torsion spring, as well as other mechanisms which facilitate stress relief in the connection between the torsion spring and pivot pin.

Abstract: A check valve has a valve body with an annular seat surrounding the duct and a flap member pivotally mounted on the valve body so as to pivot about an axis transverse to the duct from an open position to a closed position pressing against the seat. The flap member includes a circular flap plate with a rigid backer plate and a front resilient layer carried on a pivot mounting bracket having a rigid mounting plate generally parallel to the backer plate. The backer plate and the mounting plate each have a central hole therethrough and are connected by an integral body molded from a resilient elastomeric material to form the front resilient layer, a back stopper portion and a connecting neck portion arranged so as to provide resilient flexing movement between the flap plate and the mounting bracket. The mounting bracket is carried on a shaft with a pair of coil springs housed outside the body so that broken spring parts do not enter the fluid in the housing.