Abstract: A tap is provided, comprising: a water inlet for connecting to a supply of water; a water outlet for dispensing a stream of water; a fluid passageway connecting the water inlet and outlet; and a valve provided in the fluid passageway. The valve comprises a valve element and a valve seat. The valve element is moveable between an open position in which a fluid can flow through the passageway to a closed position where the valve element seals with the valve seat to inhibit fluid flowing through the passageway. An actuator extends out of the water outlet. The actuator is arranged to move the valve element against a flow direction between the open and closed positions.

Abstract: A top entry ball valve includes a housing with a central cavity communicating with two bores co-axial along a first axis. A ball valve element is rotatably mounted within the cavity for rotation about a second axis. The valve element includes a through bore; first and second seat assemblies, mounted within the co-axial bores, respectively; first and second gear assemblies engaged with the seat assemblies, respectively; and first and second rotatable drives engaged with the gear assemblies respectively. The gear assemblies are configured to move the seat assemblies along the first axis in a first direction away from the valve element when the drives are rotated in a first direction, and to move the seat assemblies along the first axis in a second direction, opposite to the first direction, when the drives are rotated in the opposite direction, to bring the seat assemblies into sealing contact with the valve element.

Abstract: A valve assembly includes a valve body with an upstream inlet and a downstream outlet and a valve element which is engageable with and disengageable from a valve seat to open and close the valve assembly. The valve body defines a bore with an axis for receiving the valve element. At least part of the bore and of the valve element have cooperating shapes which permit axial movement of the valve element in the bore and prevent rotation of the valve element in the bore. A rotatable actuator is provided, with a connection between the actuator and the valve element operable to convert rotation of the actuator into axial translation of the valve element.

Abstract: A valve assembly includes a valve body with an upstream inlet, a downstream outlet, and first and second valve elements located between them and engageable with and disengageable from first and second valve seats, respectively. The first valve seat has a diameter which is less than that of the second valve seat. An actuator is operable to engage and disengage the valve elements with the valve seats to close and open the valve assembly. The assembly is configured to provide a first flow path from the inlet to the outlet when the first valve element is disengaged from the first valve seat and to provide a second flow path from the inlet to the outlet when the second valve element is disengaged from the second valve seat. Upon operation of the actuator to open the valve, initially the first valve element disengages from the first valve seat to permit fluid flow through the first flow path in order to equalize upstream and downstream pressure on the second valve element.

Abstract: A top entry ball valve comprises a housing with a central cavity communicating with two bores which define a flow path through the housing. A ball valve element is provided and comprises a through bore. The ball valve element is rotatably mounted within the central cavity for rotation about an axis for selectively aligning the through bore with the housing bores. The ball valve element further comprises first and second flat surfaces on opposite sides of the ball valve element. The flat surfaces are perpendicular to the axis. The top entry ball valve further comprises first and second seats which are configured to provide a seal between the ball valve element and the central cavity. First and second protective rings are provided for receiving and supporting at least a portion of the first and second seats.

Abstract: A gate valve assembly includes a valve body with an inlet and outlet, a first valve element and second valve element located between the inlet and outlet. The first valve element is engageable with and disengageable from the second valve element, which is in sliding contact with the valve body and slidable between a first position, which prevents flow from the inlet to the outlet, and a second position, which permits flow from the inlet to the outlet. The assembly provides a first flow path from the inlet to the outlet when the first valve element is disengaged from the second valve element, and a second flow path from the inlet to the outlet when the second valve element is moved from the first position to the second position. Upon actuator operation, initially the first valve element disengages from the second valve element to permit fluid flow through the first flow path to equalise upstream and downstream pressure on the second valve element.

Abstract: A top entry ball valve comprises a housing with a central cavity communicating with two bores which define a flow path through the housing. A ball valve element is provided and comprises a through bore. The ball valve element is rotatably mounted within the central cavity for rotation about an axis for selectively aligning the through bore with the housing bores. The ball valve element further comprises first and second flat surfaces on opposite sides of the ball valve element. The flat surfaces are perpendicular to the axis. The top entry ball valve further comprises first and second seats which are configured to provide a seal between the ball valve element and the central cavity. First and second protective rings are provided for receiving and supporting at least a portion of the first and second seats.

Abstract: A top entry ball valve includes a housing with a central cavity communicating with two bores co-axial along a first axis. A ball valve element is rotatably mounted within the cavity for rotation about a second axis. The valve element includes a through bore; first and second seat assemblies, mounted within the co-axial bores, respectively; first and second gear assemblies engaged with the seat assemblies, respectively; and first and second rotatable drives engaged with the gear assemblies respectively. The gear assemblies are configured to move the seat assemblies along the first axis in a first direction away from the valve element when the drives are rotated in a first direction, and to move the seat assemblies along the first axis in a second direction, opposite to the first direction, when the drives are rotated in the opposite direction, to bring the seat assemblies into sealing contact with the valve element.

Abstract: A gate valve assembly 100 comprises a valve body 20 with an inlet 22 and an outlet 23 and first and second valve elements 31, 33 which are located between the inlet 22 and the outlet 23. The first valve element 31 is engageable with and disengageable from the second valve element 33. The second valve element 33 is in sliding contact with the valve body 20 and is slidable between a first position in which the second valve element 31 prevents flow from the inlet 22 to the outlet 23 and a second position in which the second valve element 31 permits flow from the inlet 22 to the outlet 23. An actuator 12 is operable to move the first and second valve elements 31, 33. The assembly 100 is configured to provide a first flow path from the inlet 22 to the outlet 23 when the first valve element 31 is disengaged from the second valve element 33, and to provide a second flow path from the inlet 22 to the outlet 23 when the second valve element 33 is moved from the first position to the second position.

Abstract: A valve assembly includes a valve body with an upstream inlet and a downstream outlet and a valve element which is engageable with and disengageable from a valve seat to open and close the valve assembly. The valve body defines a bore with an axis for receiving the valve element. At least part of the bore and of the valve element have cooperating shapes which permit axial movement of the valve element in the bore and prevent rotation of the valve element in the bore. A rotatable actuator is provided, with a connection between the actuator and the valve element operable to convert rotation of the actuator into axial translation of the valve element.

Abstract: A valve assembly includes a valve body with an upstream inlet, a downstream outlet, and first and second valve elements located between them and engageable with and disengageable from first and second valve seats, respectively. The first valve seat has a diameter which is less than that of the second valve seat. An actuator is operable to engage and disengage the valve elements with the valve seats to close and open the valve assembly. The assembly is configured to provide a first flow path from the inlet to the outlet when the first valve element is disengaged from the first valve seat and to provide a second flow path from the inlet to the outlet when the second valve element is disengaged from the second valve seat. Upon operation of the actuator to open the valve, initially the first valve element disengages from the first valve seat to permit fluid flow through the first flow path in order to equalise upstream and downstream pressure on the second valve element.

Abstract: A check valve in which a stop pin assembly is situated so as to prevent the movement of a flapper beyond a predetermined position. In a preferred embodiment the check valve has two flappers with the stop pin assembly situated therebetween to prevent either one of them from pivoting beyond an essentially vertical position. The stop pin assembly is configured such that it can be inserted and locked in place when the check valve is inserted within a valve body that contains the check valve. The stop pin assembly can comprise three elements including a central portion and first and second end portions, although the stop pin assembly could instead comprise a single element. The stop pin assembly is inserted between two holders and in a preferred embodiment is rotatable to a locking position where it is affixed in place by fasteners.

Abstract: A check valve in which a stop pin assembly is situated so as to prevent the movement of a flapper beyond a predetermined position. In a preferred embodiment the check valve has two flappers with the stop pin assembly situated therebetween to prevent either one of them from pivoting beyond an essentially vertical position. The stop pin assembly is configured such that it can be inserted and locked in place when the check valve is inserted within a valve body that contains the check valve. The stop pin assembly can comprise three elements including a central portion and first and second end portions, although the stop pin assembly could instead comprise a single element. The stop pin assembly is inserted between two holders and in a preferred embodiment is rotatable to a locking position where it is affixed in place by fasteners.