Abstract: Ball valves and ball valve components usable to control the flow of fluids and methods for manufacturing said ball valve components. Ball valves include a ball member comprising two curved segments of like shape and size, which are integrally joined and disposed symmetrically to one another relative to the axis of rotation of the ball member. A bore extends through the joined first and the second curved segments, wherein the first end of the bore is located on the first curved segment and the second end of the bore is located on the second curved segment. Each curved segment is disposed symmetrically to one another, relative to the axis of rotation. The area of separation, between the curved segments, defines shoulders of like configuration, wherein each shoulder is located symmetrically with respect to the other relative to the ball member's axis of rotation.

Abstract: Ball valves and ball valve components usable to control the flow of fluids and methods for manufacturing said ball valve components. Ball valves include a ball member comprising two curved segments of like shape and size, which are integrally joined and disposed symmetrically to one another relative to the axis of rotation of the ball member. A bore extends through the joined first and the second curved segments, wherein the first end of the bore is located on the first curved segment and the second end of the bore is located on the second curved segment. Each curved segment is disposed symmetrically to one another, relative to the axis of rotation. The area of separation, between the curved segments, defines shoulders of like configuration, wherein each shoulder is located symmetrically with respect to the other relative to the ball member's axis of rotation.

Abstract: An isolating valve includes a body having a canal for the passage of fluid, which is intended to be shut off by upstream and downstream spherical plugs, that can be actuated independently of one another between positions allowing the passage of fluid through the canal and positions of shutting off the canal, and a sealing checker, opening into the canal and between the two spherical plugs. The upstream plug is equipped with an upstream seat of the “simple piston effect” type and has no downstream seat. The downstream plug is equipped with an upstream seat of the “simple piston effect” type and with a downstream seat of the “double piston effect” type.

Abstract: A ball valve includes a first ball clamping assembly that defines a first seat surface in contact with an exterior of the ball. A second ball clamping assembly defines a second, sealing seat surface in contact with and adapted to seal with the exterior of the ball. The second ball clamping assembly is coupled to the first ball clamping assembly to clamp the ball between the first and second seat surfaces. The second ball clamping assembly includes a seat ring holder and a seat ring carried by the seat ring holder. The seat ring of the second ball clamping assembly has a sealing seat surface. A springing member is provided between the seat ring and the seat ring holder and springingly biases the seat ring toward the ball. The seat ring holder has a shoulder that supports the seat ring against fully compressing the springing member.

Abstract: An improved hemi-wedge type valve is disclosed that has upstream and downstream sealing surfaces that cooperate with opposed surfaces on the hemi-wedge valve member. This results in improved sealing and less leakage, at both high and low pressures.

Abstract: Apparatuses for restricting fluid flow through a well conduit comprise a tubular member having a helically-shaped seat member disposed within the tubular member. The helically-shaped seat member comprises first and second ends, a first position in which the first and second ends relative to each other to provide a first diameter opening through the helically-shaped seat member for receiving a plug element, and a second position in which the second end is disposed axially below and radially outward relative to the first end to provide a second diameter opening through the helically seat member, the second diameter being greater than the first diameter thereby facilitating the plug element passing through the helically-shaped seat.

Abstract: A bearing mounted ball valve (10) comprises a housing (12) having a throughbore and a valve seat (16) and an apertured ball (18) mounted within the housing in continuous engagement with the valve seat. The apertured ball is rotatable by rotation means (20), about an axis of rotation, between a throughbore open position and a throughbore closed position. The bearing mounted ball valve further comprises bearing means (26) coupled between the apertured ball and the housing for constraining the rotation of the apertured ball about the axis of rotation between the throughbore open and the throughbore closed position. In the throughbore closed position, the bearing means is adapted to release the apertured ball from the axis of rotation to permit the apertured ball to float into a sealing engagement with the valve seat.

Abstract: A ball valve having a reduced sized is provided, that includes a first shaft that extends into a housing accommodating a valve body along a rotational axis of the valve body and is connected to the valve body; and a second shaft that extends into the housing to be oppositely located to the first shaft and is rotatable about an axis line, and has a pressing part that projects radially outwardly from at least a part of the outer circumference of the second shaft. The ball valve is capable of instantly and securely opening and closing communication passages, and changing the direction of fluid flow, while being capable of minimizing the wearing of a seat member for shutting off the communication passages, by having a valve body rotatable while being kept out of contact or substantial contact with the seat member.

Abstract: A control valve of the ball type with bi-directional shutoff capabilities is disclosed. The ball valve including an inlet and an outlet, a ball element and a seal assembly. When closing the valve, the ball element, which is eccentrically mounted on a shaft, rotates to abut the seal assembly. While closed, the seal assembly including a seal housing, a main seal and a resilient member, contacts the ball element at the main seal, while the resilient member biases the main seal toward the ball element. The seal assembly further includes a secondary flowpath between the main seal and seal housing, which is restricted by a high temperature seal.

Abstract: A ball valve has a valve body defining an inner seat and having a fluid inlet and fluid outlet and a control ball element rotatably mounted in the inner seat. The control ball element has a partially spherical outer surface, a flow passage having a leading edge, a first inner control surface abutting the leading edge, and a second inner control surface abutting the leading edge at an angle oblique to the first inner control surface.

Abstract: A control valve of the ball type with bi-directional shutoff capabilities is disclosed. The ball valve including an inlet and an outlet, a ball element and a seal assembly. When closing the valve, the ball element, which is eccentrically mounted on a shaft, rotates to abut the seal assembly. While closed, the seal assembly including a seal housing, a main seal and a resilient member, contacts the ball element at the main seal, while the resilient member biases the main seal toward the ball element. The seal assembly further includes a secondary flowpath between the main seal and seal housing, which is restricted by two unidirectional seal rings.

Abstract: A ball valve assembly having two end bodies selectively detachable from each other with each end body defining a fluid conveying bore is provided. A rotatable ball valve element is disposed within the end bodies and defines a central passage having an axis, with the rotatable ball valve element having an open position in which the central passage is aligned with the fluid conveying bores and a closed position in which the passage is not aligned with the fluid conveying bores. The ball valve assembly also includes a pair of seals, with a seal disposed in each end body and in selective abutting engagement with the rotatable ball valve element. The structure of the rotatable ball valve element is controlled such that the ball valve assembly is assembled with the ball in an open position, thereby substantially eliminating the significant force normally required for assembly of the ball valve assembly.

Abstract: A valve including an at least partially spherical valve control member and a valve seat where the valve control member is rotatable within a valve housing to obturate and to open at least one opening of the housing by bringing a passage through the valve control member out of and into alignment with the opening. The valve seat includes a radially outer disc portion which lies in a plane transverse to an axis of the opening and a radially inner generally frusto-conical, annular extension free at its narrower-diameter end. The frusto-conical extension is adapted to lie in the opening with a larger-diameter end inward of the housing, and to make substantially a line contact with an at least partially spherical surface of the valve control member when the latter obturates the opening.

Abstract: A ball valve having a valve housing with an inlet and an outlet, a valve body with a bore and sealing bodies, and valve seats which are in sealing planes parallel to one another forming an oblique angle with the inlet and the outlet, and in which the sealing bodies are positioned in body planes parallel to one another, forming a similar oblique angle with the axis of the valve body.

Abstract: The device concerns a device for adjusting the relative distance or position between a check valve and the base on which it rests when it is closed. Said device consists of a valve body (1), a valve shaft (5), a check valve (5) and two bearings (2 and 3) and a base (6). The inner bores of the bearings are offset relative to their external diameter. The adjustment is carried out by appropriately positioning the bearings inside the valve body. The device is particularly designed for rotating butterfly or ball taps and valves.