Abstract: A drive that is drivable by a pressure medium is described. The drive is used for a valve that can be used in hygienic applications. The drive includes a drive housing, in which a main piston is movable along a stroke direction by the action of the pressure medium and can be coupled to a rod, and a stop for limiting a movement of the main piston. To improve the drive, it is proposed that an additional piston is provided, which is movable by the action of the pressure medium. The stop can be carried along by the additional piston. The disclosure also describes a double-seat valve comprising such a drive and to a method for operating such a drive.

Abstract: A lifting valve includes a first and a second connection, a passage connecting the first and second connections and surrounded by a valve seat, a closing element that can be brought into sealing contact with the valve seat, and an actuator to bring about the sealing contact. The closing element includes a sealing arrangement comprising a first part, a second part releasably connected to the first part, a first groove formed in the first part, a second groove, and a clamping gap. The second groove and clamping gap are formed between the first and second parts, and a seal comprising a first leg, a second leg, and a third leg is received in the sealing arrangement. The first leg is received in the first groove, the second leg is received in the second groove, and the third leg is received in the clamping gap.

Abstract: The invention relates to an actuating device for a rotatable closure part of a valve, in particular a pneumatically or hydraulically actuatable rotary drive for a disk or throttle valve, with a housing, in which a drive piston that is sealed from a cylindrical housing casing is arranged and is suppliable on one side with a pressurizing medium, which preferably has a tubular piston skirt, with a drive shaft, which is guided on one side out of the housing and drives in a rotating manner the closure part indirectly or directly, wherein the drive piston executes either an axial shift movement against the effect of at least one return spring in the case of a one-sided supply with the pressurizing medium or a back and forth shift movement in the case of an alternating supply with a pressurizing medium, wherein the piston skirt experiences an axially oriented guidance in the housing via at least one axial groove formed in it, into which a straight-line guide cam permanently connected with the housing engages, and wh

Abstract: A method for cleaning the seat of a double seat valve, the double set valve having a deflection surface bordering the remaining area of a recess not delimiting a circumferential wall and opening out from the latter at a front and radially inside end of a second closing member facing a first closing member. The method rinses the seating when closing members are opened and generates a seat cleaning flow and urges a first cleaning flow through a deflection surface.

Abstract: A double-seat valve has a seat-cleaning function and ensures that the seat-cleaning flow is conducted into and out of the leakage hollow space with as little turbulence as possible. The valve reliably prevents a pressure-increasing direct action upon the seat regions, even in the event that the cross-sectional area of the drain bore is smaller than that of the largest pipeline that can be connected to the valve. This is achieved in that a region of extension of the deflection surface that faces away from the radially outer end of the deflection surface delimits the remaining region of the opening in its entirety and opens out from the second closing element at an end-face and radially inner end of the second closing element, facing the first closing element.

Abstract: The invention relates to diagnostic methods according to the preamble of the equivalent claims 1 and 2, with which the state of a poppet valve in the course of the switching cycles and/or events thereof, such as the occurrence of pressure shocks or surges during continuous operation is/are monitored continuously, the measured signals are stored and the stored measured signals are interpreted in a targeted manner and early indication of cases of damage is carried out.

Abstract: A valve has a valve housing with a first port and a second port, and has a closing member movable along an axial direction. When in a closed position, the closing member interacts sealingly with a valve seat to block a fluid connection between the first and second ports. An fluid-impermeable diaphragm comprises a central opening through which a closing member arrangement including the closing member extends, and a clamping section that runs in a clamping gap. The diaphragm is held with sealing action between the closing member arrangement and a holding arrangement on the housing. The diaphragm has a first section and a second section adjoining the first section. The first section is held in the holding arrangement with a force fit, the second section is guided in the holding arrangement, and the first and second sections are arranged at an angle relative to one another. A form fit is generated by the first section, second section and holding arrangement.

Abstract: A double-seat valve has a seat-cleaning function and ensures that the seat-cleaning flow is conducted into and out of the leakage hollow space with as little turbulence as possible. The valve reliably prevents a pressure-increasing direct action upon the seat regions, even in the event that the cross-sectional area of the drain bore is smaller than that of the largest pipeline that can be connected to the valve. This is achieved in that a region of extension of the deflection surface that faces away from the radially outer end of the deflection surface delimits the remaining region of the opening in its entirety and opens out from the second closing element at an end-face and radially inner end of the second closing element, facing the first closing element.

Abstract: The invention relates to an actuating device for a rotatable closure part of a valve, in particular a pneumatically or hydraulically actuatable rotary drive for a disk or throttle valve, with a housing, in which a drive piston that is sealed from a cylindrical housing casing is arranged and is suppliable on one side with a pressurizing medium, which preferably has a tubular piston skirt, with a drive shaft, which is guided on one side out of the housing and drives in a rotating manner the closure part indirectly or directly, wherein the drive piston executes either an axial shift movement against the effect of at least one return spring in the case of a one-sided supply with the pressurizing medium or a back and forth shift movement in the case of an alternating supply with a pressurizing medium, wherein the piston skirt experiences an axially oriented guidance in the housing via at least one axial groove formed in it, into which a straight-line guide cam permanently connected with the housing engages, and wh

Abstract: A valve has a valve housing with a first port and a second port, and has a closing member movable along an axial direction. When in a closed position, the closing member interacts sealingly with a valve seat to block a fluid connection between the first and second ports. An fluid-impermeable diaphragm comprises a central opening through which a closing member arrangement including the closing member extends, and a clamping section that runs in a clamping gap. The diaphragm is held with sealing action between the closing member arrangement and a holding arrangement on the housing. The diaphragm has a first section and a second section adjoining the first section. The first section is held in the holding arrangement with a force fit, the second section is guided in the holding arrangement, and the first and second sections are arranged at an angle relative to one another. A form fit is generated by the first section, second section and holding arrangement.

Abstract: A method for cleaning the seat of a double seat valve and the double set valve has a deflection surface bordering the remaining area of a recess not delimiting a circumferential wall and opens out from the latter at a front and radially insise end of a second closing member facing a first closing member.

Abstract: A device for the piping of process systems in the food and beverage industry in that: the respective valve distributor tree (rvdt) opens immediately into the lower tank bottom of a respectively associated tank of the process system, and/or the rvdt is connected via an associated pipe connection to an associated process aggregate or to the lower tank bottom of the process apparatus, and the pipe connection opens out into the tank-side or process-aggregate-side end of the valve distributor tree (vdt); a stirring device (16) which is operative in the entire interior space of the hollow structure is disposed in the vdt; and/or the vdt with the entire interior space of the hollow structure is part of a circulation line which extends over the tank or the process aggregate; and/or the vdt can be recuperatively acted upon by a heat transfer medium (W).

Abstract: The invention relates to a seat cleaning-capable double-seat valve (1) with two serially arranged closing elements (3, 4), moveable relative to each other and designed as slide pistons, which border both in the closed and open position of the double seat valve (1) a leakage cavity (9), which is connected with the surroundings of the double-seat valve (1) via a tubular shaft (4b/4c) arranged on a low-lying (with respect to a vertical normal position of the double-seat valve (1)), second closing element (4), in which a drainage hole (4d) is arranged. The second, independently driven closing element (4) is thereby designed larger than the first, independently driven closing element (3) so that, as a result, the double-seat valve (1) opens downward and the drainage of the leakage cavity (9) also takes place downward.

Abstract: A piping system for food and beverage process plants connecting a tank and process assembly to a pipe system via double seat valves mix-proof in the seat including valve distributor trees and the double seat has two serially disposed closing members with open and closed positions, the closing members delimiting a leakage cavity with a connection path to the surroundings of the double seat valve. A first closing member comes in sealing contact at a second closing member and transfers the second closing member into a sealed position. The second closing member having a hollow rod and a seat seal.

Abstract: The invention relates to diagnostic methods according to the preamble of the equivalent claims 1 and 2, with which the state of a poppet valve in the course of the switching cycles and/or events thereof, such as the occurrence of pressure shocks or surges during continuous operation is/are monitored continuously, the measured signals are stored and the stored measured signals are interpreted in a targeted manner and early indication of cases of damage is carried out.

Abstract: A device for driving a double seat valve with two closing elements arranged in series and displaceable with respect to each other. A sleeve-shaped fourth drive piston pressurized by pressure medium, sealingly embraces a second drive piston on the circumference and can engage a catching connection in the direction of a first drive piston, wherein a second drive piston is adapted to be axially displaceable in a limited manner in both directions with respect to the first drive piston and in each case against the force of a second spring.

Abstract: The invention relates to a double-seat valve including closing elements (3,4) which can be transferred independently of one another by a respective partial lift gap-wide into a seat cleaning position for purposes of flushing their coaxial seat surfaces (2a, 2b), the second closing element (4) by a second partial lift (T2) which acts in the same direction as the opening motion and the first closing element (3) by a first partial lift (T1) which acts in the direction opposite the opening motion travelling into its respective seat cleaning position. The second closing element (4) in its closed position has a stop face (4f) forming a second circumferential edge (U2). A deflection surface (4d) discharges in a front face (4e) of a recess (4b) which is oriented essentially perpendicular to the longitudinal axis of the second closing element (4). The deflection surface (4d) has a contour (K) which runs without bends.

Abstract: The invention relates to a double seat valve which is capable of cleaning the seat. The double seat valve includes a closing element (4), when in its closed position rests with a stop surface (4e), arranged on a boundary surface thereof radially adjacent on an inner side to a seal (7), on a second seating surface (2b) and directly adjacent to a first seating surface (2a, 2g) with a central recess (4d) provided in a front face of the closing element (4) facing a leakage cavity (5). The closing element (4) further includes a deflector surface (4b) opening in a front face (4c), wherein the deflector surface (4b) and the slop surface (4e) form a circumferential edge (U2) directly adjacent to a first end section (2g) of the first seating surface (2a) in the closed position of the closing element (4).

Abstract: A device for the piping of process systems in the food and beverage industry. in that: the respective valve distributor tree (rvdt) opens immediately into the lower tank bottom of a respectively associated tank of the process system, and/or the rvdt is connected via an associated pipe connection to an associated process aggregate or to the lower tank bottom of the process apparatus, and the pipe connection opens out into the tank-side or process-aggregate-side end of the valve distributor tree (vdt); a stirring device (16) which is operative in the entire interior space of the hollow structure is disposed in the vdt; and/or the vdt with the entire interior space of the hollow structure is part of a circulation line which extends over the tank or the process aggregate; and/or the vdt can be recuperatively acted upon by a heat transfer medium (W).

Abstract: The invention relates to a device (100) for driving a double seat valve (1) having two closing members (3,4) disposed in series and displaceable relative to each other and preventing, in the closed position of the double seat valve (1), the flow of fluids from a valve housing part (1 a; 1 b) into another (1 b; 1 a) through a connecting opening connecting said valve housing parts of a valve housing (10) with each other, and, even in the open position, bounding a leakage cavity (9) of the double seat valve (1) connected to the vicinity of the double seat valve (1).