The invention relates to a valve with a variable opening (10) for controlling the flow of a mixture of solids and fluids, such as the mixture present in petroleum processing equipment. The valve comprises: —a tubular pipe (12), —first (14) and second (16) planar plates extending transversally to the pipe (12), one of which is rigidly connected to the pipe (12) and the other is able to pivot. The plates are drilled with a central opening (141, 161) and a plurality of peripheral openings (143, 163) which are arranged circumferentially around the central opening, and at least the form and spacing of which match. Each peripheral opening (143) of the first plate with openings is surrounded by a shaft (145) which is rigidly connected to the first plate with openings and projects from a surface (14a) of said plate, which surface is located on the side opposite the second plate with openings. Said shafts enable redirection of debris falling onto the first plate.

A valve device includes a housing, a stationary disk, a drive device, a shaft and a rotor. The stationary disk is fixed at an inside of the housing and has at least one flow passage hole. The shaft is rotated about a central axis by the drive device. The rotor increases or decreases an opening degree of the at least one flow passage hole. The rotor includes: a drive disk that slides relative to the stationary disk; and a lever that is fixed to the drive disk and couples between the drive disk and the shaft. A torsion spring is placed between the shaft and the lever and urges the lever relative to the shaft in a circumferential direction around the central axis of the shaft. The shaft has a plurality of contact portions configured to contact the lever and respectively located at a plurality of locations.

A valve device includes a housing, a stationary disk, a drive device, a shaft and a rotor. The stationary disk is fixed at an inside of the housing and has at least one flow passage hole. The shaft is rotated about a central axis by the drive device. The rotor increases or decreases an opening degree of the at least one flow passage hole. The rotor includes: a drive disk that slides relative to the stationary disk; and a lever that is fixed to the drive disk and couples between the drive disk and the shaft. A torsion spring is placed between the shaft and the lever and urges the lever relative to the shaft in a circumferential direction around the central axis of the shaft. The shaft has a plurality of contact portions configured to contact the lever and respectively located at a plurality of locations.

A valve device includes a housing, a stationary disk, a drive device, a shaft and a rotor. The stationary disk is fixed at an inside of the housing and has at least one flow passage hole. The shaft is rotated about a central axis by the drive device. The rotor increases or decreases an opening degree of the at least one flow passage hole. The rotor includes: a drive disk that slides relative to the stationary disk; and a lever that is fixed to the drive disk and couples between the drive disk and the shaft. A first torsion spring is placed between the housing and the shaft and urges the shaft relative to the housing in a circumferential direction around the central axis, and a second torsion spring is placed between the shaft and the lever and urges the lever relative to the shaft in the circumferential direction.

A valve device includes a housing, a stationary disk, a drive device, a shaft and a rotor. The stationary disk is fixed at an inside of the housing and has at least one flow passage hole. The shaft is rotated about a central axis by the drive device. The rotor increases or decreases an opening degree of the at least one flow passage hole. The rotor includes: a drive disk that slides relative to the stationary disk; and a lever that is fixed to the drive disk and couples between the drive disk and the shaft. A first torsion spring is placed between the housing and the shaft and urges the shaft relative to the housing in a circumferential direction around the central axis, and a second torsion spring is placed between the shaft and the lever and urges the lever relative to the shaft in the circumferential direction.

A motor-driven axial-flow control valve is disclosed that has a valve body with an inlet and an opposite outlet and a passage located between having a substantially axial alignment relative to the inlet and outlet, and a flow control path arranged in the passage with an operative connection to a motor drive in a switch housing resting on the valve body. The flow control valve is formed by two radially arranged discs lying on one another and each having at least one passage opening where one disc is a stator disc permanently arranged in the valve body, and the other disc lies axially rotatably on the stator disk, and the rotatable disc is in engagement with an axially rotatable sleeve that is arranged axially in the passage and through which flow can pass in the cavity of the rotatable disc.

The application relates to a rotary valve, in particular a multi-way regulating valve, with a housing, which has at least one inlet connection and at least one outlet connection for a liquid and/or gaseous medium, with at least one valve element, which is rotatably mounted in the housing between the connections in order to set at least one desired flow cross-section, and with a control shaft, which is non-rotatably connected to the valve element, which control shaft is led out of the housing with a coupling end, through an opening in a housing wall of the housing, wherein the control shaft has a radial projection, which has an axial stop for making axial contact with an annular sealing protrusion of the housing wall, and with at least one sealing element acting between the control shaft and the housing. It is provided that the annular projection of the control shaft has at least one axial recess on the end face thereof facing the housing wall, which axial recess extends over a limited circumferential section of the end face to the radial outer edge of the annular projection, and that a chamber is formed between the annular projection, the control shaft, the housing wall, and the sealing projection, in which chamber the sealing element is arranged.

A method for expanding a compressed gas (GD) at a gas pressure (pD) with a reciprocating-piston machine, wherein the reciprocating-piston machine includes a piston that can move to and fro and a working chamber delimited by the movable piston. The method being carried out as follows: the compressed gas (GD) is supplied to the working chamber via an actuatable rotary slide valve, wherein the compressed gas (GD) in the working chamber is expanded in the working chamber.

The ceramic joint body according to the present disclosure includes: a first member made of ceramic and including a first flow channel configured to feed fluid; and a second member made of ceramic and including a second flow channel connected to the first flow channel to feed the fluid. The ceramic includes zirconium oxide and aluminum oxide, and at least one of the zirconium oxide and the aluminum oxide is a primary constituent, and a first opposing surface of the first member, which faces the second member, and a second opposing surface of the second member, which faces the first member, are connected by diffusion bonding.

The ceramic joint body according to the present disclosure includes: a first member made of ceramic and including a first flow channel configured to feed fluid; and a second member made of ceramic and including a second flow channel connected to the first flow channel to feed the fluid. The ceramic includes zirconium oxide and aluminum oxide, and at least one of the zirconium oxide and the aluminum oxide is a primary constituent, and a first opposing surface of the first member, which faces the second member, and a second opposing surface of the second member, which faces the first member, are connected by diffusion bonding.