This disclosure relates to a shut-off valve, in particular a pipe-bridge slide valve, for a coking drum for the production of coke, having at least one pipe socket which has a first end for connection to the coking drum and a second end on which a slider is arranged for opening and closing the coking drum, wherein the pipe socket has a supply connection for filling the coking drum with a medium and a diaphragm which is arranged between the supply connection and the first end of the pipe socket and can be moved into a filling position and into an emptying position, wherein, in the filling position, a diaphragm opening is arranged in the region of the central longitudinal axis of the pipe socket for introducing the medium centrally into the coking drum, and, in the emptying position, the diaphragm opening has a larger passage area than in the filling position.

A valve actuated device for a valve having a valve body and a valve translating member; a housing; a rotary and non-translating sleeve mounted in the housing and connected to an input rotary means; an axial shaft means positioned coaxially to the sleeve and adapted to be connected to the valve translating member; screw connecting means provided between the axial shaft means and the sleeve for convert applied rotation of the sleeve into axial translation of the axial shaft means; anti-rotation and axial guidance means installed between the housing and the shaft means; the anti-rotation and axial guidance means providing a linear ball bearing including a sleeve mounted to the housing and at least one rolling element recirculation system, the rolling elements thereof engaging axial groove of the shaft means.

An electrically operated gas flow regulating valve in which a needle valve body (2) is moved axially through a motion conversion mechanism (4) by the rotation of an electric motor (3). The motion conversion mechanism (4) includes: a guide tube (5) in which is formed axially elongated slits (51) with which cam pins (21) fixed to the needle valve (2) are slidably engaged; and a tubular cam body (6) having a spiral cam part with which the cam pins (21) are engages through elongated slits (51). In an arrangement in which one of the guide tube (5) and the cam body (6), e.g., the guide tube (5), is rotated by the electric motor (3), hysteresis is restrained from occurring.

The cam part disposed in the cam body (6) is constituted by a spirally inclined sides (61) with which the cam pins (21) are brought into contact from axial one direction. A spring member (7) is disposed so as to urge the cam pins (21) in the other of the axial directions toward the spirally inclined sides (61).

An electrically operated gas flow regulating valve in which a needle valve body (2) is moved axially through a motion conversion mechanism (4) by the rotation of an electric motor (3). The motion conversion mechanism (4) includes: a guide tube (5) in which is formed axially elongated slits (51) with which cam pins (21) fixed to the needle valve (2) are slidably engaged; and a tubular cam body (6) having a spiral cam part with which the cam pins (21) are engages through elongated slits (51). In an arrangement in which one of the guide tube (5) and the cam body (6), e.g., the guide tube (5), is rotated by the electric motor (3), hysteresis is restrained from occurring.

The cam part disposed in the cam body (6) is constituted by a spirally inclined sides (61) with which the cam pins (21) are brought into contact from axial one direction. A spring member (7) is disposed so as to urge the cam pins (21) in the other of the axial directions toward the spirally inclined sides (61).

A ring base member of a disc seat ring is fixed to a valve disc using a bolt. The valve disc is formed of a first austenitic stainless steel containing 17.0% by mass to 21.0% by mass of Cr and 8.0% by mass to 13.0% by mass of Ni. The ring base member is formed of a second austenitic stainless steel containing 17.0% by mass to 20.0% by mass of Cr and 8.0% by mass to 15.0% by mass of Ni.

A ring base member of a disc seat ring is fixed to a valve disc using a bolt. The valve disc is formed of a first austenitic stainless steel containing 17.0% by mass to 21.0% by mass of Cr and 8.0% by mass to 13.0% by mass of Ni. The ring base member is formed of a second austenitic stainless steel containing 17.0% by mass to 20.0% by mass of Cr and 8.0% by mass to 15.0% by mass of Ni.

An electromagnetic and pilot-operated proportional valve with a valve slide unit (12) mounted in a valve housing (10) so as to be movable along an axial direction, which unit can be driven by an electromagnetic actuator assembly (16) provided at one axial end for the pilot-operated opening of a useful fluid inlet and/or outlet (24) of the valve housing as a response to energisation of a stationary coil (20) of the actuator assembly and interacts with mechanical force storage means (48, 50), more particularly is held in an unenergised stable axial position in the valve housing by said means, wherein the valve slide unit having a closure section (22) extending radially from one body section (30) of the valve slide unit (12) for sealing interaction with the useful fluid inlet or outlet (24) formed on a circumferential inner wall of the housing (10) interacts axially at one end, by means of the preferably cylindrical and/or coaxially extending body section (22), with a stationary guide section (40) of the valve housing to form an axial sliding bearing (62) and, at the other end, is mounted with radial play (56), wherein preferably ring-shaped sealing means (32) seal a circumferential section of the body section with radial play to the circumferential inner wall of the valve housing.

An electromagnetic and pilot-operated proportional valve with a valve slide unit (12) mounted in a valve housing (10) so as to be movable along an axial direction, which unit can be driven by an electromagnetic actuator assembly (16) provided at one axial end for the pilot-operated opening of a useful fluid inlet and/or outlet (24) of the valve housing as a response to energisation of a stationary coil (20) of the actuator assembly and interacts with mechanical force storage means (48, 50), more particularly is held in an unenergised stable axial position in the valve housing by said means, wherein the valve slide unit having a closure section (22) extending radially from one body section (30) of the valve slide unit (12) for sealing interaction with the useful fluid inlet or outlet (24) formed on a circumferential inner wall of the housing (10) interacts axially at one end, by means of the preferably cylindrical and/or coaxially extending body section (22), with a stationary guide section (40) of the valve housing to form an axial sliding bearing (62) and, at the other end, is mounted with radial play (56), wherein preferably ring-shaped sealing means (32) seal a circumferential section of the body section with radial play to the circumferential inner wall of the valve housing.

A valve stem lifter assembly which operates to alternatively open and close a valve, includes a rotatably mounted rotary shaft having a free end axially aligned with a pull shaft and an opposite free end axially aligned with an operator for selectively producing rotational movement of the rotary shaft and corresponding axial movement of the pull shaft. The rotary shaft is rotatably connected to a valve riser element by radius set screws positioned axially in the grooves of the rotary shaft. A plurality of guide shaft rods interconnects the riser to the valve stem lifter assembly to prevent axial separation of the riser and rotary shaft while permitting free relative rotation of the rotary shaft and linear movement of the pull shaft.

A valve stem lifter assembly which operates to alternatively open and close a valve, includes a rotatably mounted rotary shaft having a free end axially aligned with a pull shaft and an opposite free end axially aligned with an operator for selectively producing rotational movement of the rotary shaft and corresponding axial movement of the pull shaft. The rotary shaft is rotatably connected to a valve riser element by radius set screws positioned axially in the grooves of the rotary shaft. A plurality of guide shaft rods interconnects the riser to the valve stem lifter assembly to prevent axial separation of the riser and rotary shaft while permitting free relative rotation of the rotary shaft and linear movement of the pull shaft.