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 ball valve includes a body and a ball subassembly. The body includes a first bore extending partially through the body from a first flange of the body along a first axis, the flange defining an opening, a second bore extending in along a second axis from the first bore to a second flange, wherein the second axis is transverse to the first axis, and a third bore extending along the second axis, opposite the second bore, from the first bore to a third flange. The ball subassembly is configured to be inserted into first bore of the body through the opening. The ball subassembly includes a ball having a ball bore extending through the ball. The ball is configured to rotate about the first axis to open and close the ball valve such that the ball bore is substantially aligned with the second axis when the ball valve is open, and wherein the ball bore is substantially transverse to the second axis when the valve is closed.

Abstract: A top entry trunnion mounted rotary ball valve defining a main valve body having an upstream and a downstream ball seat assembly, the ball seat assemblies further including a soft insert seal, a ball seat, a seat retainer and a plurality of compression springs in between the ball seat and the seat retainer. A guiding groove on a cylindrical surface of each of the ball seats, having a first end and a second end at an axial distance equal to or more than a measure of retraction required so as to get a mechanical clearance to remove or assemble the ball member. Each ball seat is retracted in a recess against a force Fc of the compression springs and the mechanical clearance is created between the ball member and the soft insert seal, to remove or assemble the ball member and or any component from inside the valve body.

Abstract: A method and apparatus for controlling fluid flow with a quarter-turn ball valve with seats operated to lift off the sealing surface of the ball valve prior to ball rotation and to reseat upon completion of the ball rotation. One embodiment shown relates to a quarter-turn ball valve having a rotatable cam with an eccentric camming disk that engages a cam pocket in the ball seats to reciprocally lift off the sealing surface of the ball valve prior to ball rotation and to reseat upon completion of the ball rotation. An embodiment is also shown that provides filler pieces that restrict that flow around the ball valve whenever the ball seats are lifted off the surface of the ball valve.

Abstract: A ball valve which can suppress the increasing of processing labor time and reliably prevent simultaneous rotation of a ball seat and a ball when the ball is rotated by handle manipulation is provided. The valve body 2 is formed of a hard material such as stainless steel, the ball seat is formed of a relatively soft material such as a fluorine resin, and a protrusion 18 is formed on a ball seat support surface 13 of the valve body 2 made of a hard material so as to bite into the ball seat 4.

Abstract: The ball valve may be manually opened and dosed with ease and securely prevent leakage. The ball valve includes a valve body having a fluid inlet passage, fluid outlet passage, and a communicating part provided between these passages. The ball valve includes a ball having a fluid communication passage and preferably is arranged on the communicating part of the valve body for rotating about a reference axis. A substantially cylindrical ball seat which preferably has a desired opening part on its peripheral wall and is arranged between the ball and valve body. The ball valve includes a ball seat pressing part inside the valve body, adjacent to the ball seat and a presser screw screwed into the inner periphery of the valve body. The presser screw preferably presses the ball seat pressing part by adjustment of its tightening force and presses the ball seat pressing part without contacting the packing.

Abstract: A metal seated floating ball valve for in-line repair has a valve body, a ball mounted in the valve body, a stem connected to the ball, and a bonnet connected to the valve body. The floating ball valve further has a first seat and a second seat adjacent the ball mounted in the valve body, an energizing ring mounted in the valve body proximate the first seat and in series with the first seat and the second seat, and a valve seat bias mounted in the valve body proximate the energizing ring and in series with the energizing ring. The energizing ring may have a slot near the upper end and a wedge surface along the lower end.

Abstract: A valve assembly includes a valve body and a bonnet. The valve body has a cylindrical access channel with adjoining at least one radial keyway. At least one coupling cavity adjoins and is out of register with the at least one radial keyway. The bonnet has a cylindrical body with at least one radially extending lug. The at least one lug is configured and sized to be accepted by the at least one radial keyway and to be housed within the at least one coupling cavity when the cylindrical body is twisted so that the at least one lug is out of register with the at least one radial keyway.

Abstract: A top entry plastic ball valve comprises a valve stem cap (1), a valve stem (2), a valve stem sealing ring (3), a valve ball sealing ring (5), a supporting ring (6) for the valve ball sealing ring, a valve ball (7), a connecting pipe (8), and a valve body (9). A hollow valve ball chamber (911) is provided inside the valve body (9), the valve body (9) is provided with a valve cover hole (912) just above the valve ball chamber (911), and the width of the valve cover hole (912) is larger than the diameter of the valve ball (7). The ball valve also comprises a valve cover (4), which is provided with a valve stem shaft hole (410) for allowing the valve stem (2) to pass through and corresponds to the valve cover hole (912) so that the valve cover (4) can cover the valve cover hole (912) and can be fusion-bonded to the valve body (9), thereby avoiding the need for electric fusion welding process in the manufacture of large-diameter ball valves.

Abstract: A fluid flow control device includes a valve body, a bonnet, a control assembly, and a seal assembly. The valve body defines an inlet portion, an outlet portion, a bonnet opening, and a fluid flow path extending between the inlet portion and the outlet portion. The bonnet is disposed in the bonnet opening. The control assembly is at least partly supported by the bonnet, and includes a ball element disposed within the valve body and rotatable between an open position and a closed position. The valve body defines an internal recess at a location downstream from the inlet portion and adjacent the bonnet opening. The seal assembly is disposed within the internal recess and includes a movable sleeve seal, a retaining device, and one or more sealing elements for preventing leakage between the sleeve seal and the retaining device and/or the valve body.

Abstract: A ball valve includes a valve element and a single piece packing that seals the valve element within a valve cavity. The single piece packing is installed over the valve element at room temperature or may be molded thereon. The valve element may include a flow control element such as a ball and upper and lower trunnions. The various dimensions of the valve element and packing are selected to facilitate room temperature assembly and to substantially reduce the volume of packing material, thereby improving the performance of the valve over wider temperature ranges and pressure ratings.

Abstract: A ball valve includes a valve element and a single piece packing that seals the valve element within a valve cavity. The single piece packing is pulled over the valve element at room temperature or may be molded on. The valve element may include a flow control element such as a ball and upper and lower trunnions. The lower trunnion may extend past a lower end of the packing.

Abstract: A ball valve has a valve body having a chamber, aligned inlet and outlet passages providing flow therethrough, and an access passage communicating with the chamber. A replaceable cartridge assembly is seated in the chamber and includes a generally spherical ball having a flow passage therethrough alignable with the inlet and outlet passages, an inlet valve seat, and an outlet valve seat. A cartridge body member extends about and couples the ball and the valve seats. A resiliently deflectable biasing member biases the inlet valve seat and the ball against the outlet seat. A resiliently deflectable biasing member acts upon the inlet end of the cartridge body and a deflector is movable between a first position in which the biasing member is substantially free from deflection and a second position in which the biasing member is deflected to bias the cartridge body and the outlet valve seat against the wall of the valve body chamber to effect a seat-to-body seal.

Abstract: A ball value has a valve body defining a cavity, a ball closing component disposed within the cavity through a cavity opening, a cover, and seal assemblies having seating rings with seals disposed engaging both sides of the ball closing component. The seating rings slide in recesses of the valve body into and out of engagement with the ball closing component. The seating rings have flange with seals each engaging a side of the corresponding recess. A closing ring is screwed into the cavity to engage the seating rings. The flange of the seating ring defines a working chamber with the recess and the closing ring. The working chamber is communicated with a pressurized medium source and the working chamber is pressurized to displace the seating rings from the ball closing component to allow seal replacement.

Abstract: A ball valve assembly of the quarter-turn type for use in isolating an electronic level transmitter comprising a valve body having an inner chamber, an inlet or tank-side port, an outlet or transmitter side port, a valve body axis defined by the inlet and outlet ports, and a substantially spherical ball valve member having an inner surface forming a through passage mounted in the chamber for selective rotation between an open position and a closed position. The present invention allows for flushing the diaphragm face of a level transmitter with the ball valve member in an open position via a purge port positioned on the valve body and a purge passage connecting the through passage and a seating face portion of the outer surface of the ball valve member. The present invention is provided with a full port opening through the ball valve assembly for enhancing the accuracy of level transmitter readings and valve backflush capabilities.

Abstract: A ball valve comprises a main body having a chamber, inlet and outlet pipes and an extension tube, the chamber having a hollow interior, the extension tube being connected to the hollow interior of the chamber and the inlet and outlet pipes being connected to the hollow interior of the chamber, a switching member having a ball and a rotary shaft, the ball having a channel formed therein correspondingly to the inlet and outlet pipes and the rotary shaft being connected to the ball, and a sealing member having a channel securing hole corresponding to the channel of the ball, the sealing member being formed of elastic material in a cylindrical shape for containing the ball therein.

Abstract: A ball valve equipped with a ball closing component (1) a cover (18) and seals assemblies (2) having sediment rings (5) with seals (6) characterised in that on the lateral surface of each sediment ring (5) there is a flange (9), having from the side of a ball closing component (1), working surface (10). The space of the recess (3) of a body (4) contains a working chamber (11) placed between working surface (10) of the flange (9) and a closing ring (12) screwed down to the inner part of the body (4) and a chamber (13) placed from the back wall (8) of the recess (3). The working chamber (11) is connected in a passage way with the interior of the body (4).

Abstract: A top-entry ball valve assembly that includes top and bottom camming plates which are coupled to top and bottom shoulders of the ball valve member. The camming plates include a first pair of opposing camming corner-surfaces to displace the spring-biased valve seat from the perimeter of the ball valve member when it is rotated between open and closed positions. The plates further include a second pair of opposing camming corner-surfaces to fully retract the spring-biased valve seat when being serviced so that the retraction tool can be inserted to hold the seats in place with little or no damage to the forward end of the seats.

Abstract: A ball valve having a magnetic seat sealing device comprises a valve body, a valve seat, a valve ball, a valve stem and a valve bonnet, wherein the valve seat is disposed within a valve body cavity of the valve body, the valve ball being rotatably disposed on the valve seat, the valve bonnet engaging the valve body to confine the valve body cavity, the valve stem passing through the valve bonnet and drivingly engaging the valve ball; and being characterized by comprising a magnetic seat sealing device that employs a magnetic mechanism to control the metal valve seat, so that when the ball valve is in a closed condition, the magnetic mechanism exerts a magnetic force to the metal valve seat to further tighten and seal the valve seat against the valve ball; and when the ball valve is in an open condition, the magnetic force is released to allow the metal valve seat to return its original position; whereby the metal ball valve can be operated by a low operative torque and maintaining superior sealing effect.

Abstract: A ball valve having a magnetic seat sealing device comprises a valve body, a valve seat, a valve ball, a valve stem and a valve bonnet, wherein the valve seat is disposed within a valve body cavity of the valve body, the valve ball being rotatably disposed on the valve seat, the valve bonnet engaging the valve body to confine the valve body cavity, the valve stem passing through the valve bonnet and drivingly engaging the valve ball; and being characterized by comprising a magnetic seat sealing device that employs a magnetic mechanism to control the metal valve seat, so that when the ball valve is in a closed condition, the magnetic mechanism exerts a magnetic force to the metal valve seat to further tighten and seal the valve seat against the valve ball; and when the ball valve is in an open condition, the magnetic force is released to allow the metal valve seat to return its original position; whereby the metal ball valve can be operated by a low operative torque and maintaining superior sealing effect.

Abstract: A V-ball-type control valve having: a valve body installable in a piping system; a V-ball-type valve element rotatably positioned in the valve body; a valve shaft extending from the V-ball-valve element; and a bonnet removably attachable to the valve body. The valve shaft is rotatably positionable through the bonnet such that the bonnet, the valve shaft, and the valve ball element can all be removed from the valve body without removing the valve body from the piping system.