An exhaust gas-conducting section of an exhaust turbocharger comprises a duct with a through-flow opening which can be fully or at least partially blocked or released by a closure element of a control device. The closure element is designed as a poppet valve. The closure element can be moved by an actuator can be disposed in a wall of the exhaust gas-conducting section. The closure element has a closure body with an annular section surface on its bottom surface which faces the through-flow opening. The section surface corresponds to an element seat formed in the wall. Its top surface faces away from the bottom surface and is designed in a profiled manner in order to produce a top surface at least partially corresponding to another element seat and/or to achieve flow-optimized circulation.

An actuated valve assembly includes a valve body (110) having a valve seat (112) disposed between inlet (111) and outlet (113) passages, and a fixed orifice (115) restriction provided in at least one of the inlet and outlet passages, a valve element (120) assembled with the valve body and axially movable between a closed position and an open position, and an actuator (130) assembled with the valve body and connected with the valve element for axial movement of the valve element between the closed and open positions. A ratio of the maximum seat annulus flow coefficient associated with the valve seat and valve element to an orifice flow coefficient associated with the fixed orifice restriction is between about 2:1 and about 8:1.

A vacuum valve including a housing, a closure unit with two valve plates, supported by a valve rod, and a carrier piece connected rigidly to the valve rod, a transmission unit, a drive unit with a base body and an actuator, a longitudinal linear guide, by which the transmission unit is guided parallel to a longitudinal adjusting direction relative to the base body, an oblique linear guide, by which the carrier piece is guided parallel to an oblique adjusting direction relative to the transmission unit, a spring acting between the transmission unit and the carrier piece, a stop device which blocks adjustment of the closure unit in the longitudinal adjusting direction in a middle position thereof, and a blocking unit, which in the locked state blocks an adjustment of the closure unit situated in the middle position counter to the longitudinal adjusting direction and, in the release state, allows adjustment.

A vacuum valve including a housing, a closure unit with two valve plates, supported by a valve rod, and a carrier piece connected rigidly to the valve rod, a transmission unit, a drive unit with a base body and an actuator, a longitudinal linear guide, by which the transmission unit is guided parallel to a longitudinal adjusting direction relative to the base body, an oblique linear guide, by which the carrier piece is guided parallel to an oblique adjusting direction relative to the transmission unit, a spring acting between the transmission unit and the carrier piece, a stop device which blocks adjustment of the closure unit in the longitudinal adjusting direction in a middle position thereof, and a blocking unit, which in the locked state blocks an adjustment of the closure unit situated in the middle position counter to the longitudinal adjusting direction and, in the release state, allows adjustment.

A valve closure device for a check valve can include a first valve member configured to rotate from an open position to a closed position; a second valve member configured to rotate from an open position of the second valve member to a closed position of the second valve member; and a hydraulic dampener coupled to each of the first valve member and the second valve member in each of the open position and the closed position of each of the first valve member and the second valve member, the hydraulic dampener configured to resist rotation of the first valve member towards the closed position of the first valve member and the second valve member towards the closed position of the second valve member.

A main flow path that introduces high-pressure air to an air cylinder, or discharges exhaust air therefrom, includes a sub flow path provided alongside the main flow path; an exhaust flow rate adjustment unit that suppresses the operation speed of the air cylinder by adjusting the flow rate of the exhaust air flowing through the sub flow path; and a switching valve that is connected between the air cylinder, the main flow path and the sub flow path, and that connects the main flow path and the sub flow path to the air cylinder in a switching manner. The switching valve is constituted by a spool valve.

A valve device comprising a valve housing with a flow channel having a fluid outflow side and a fluid inflow side, a leaf spring having a fastening portion and a free portion. The fastening portion is connected to the valve housing such that, in a closed configuration, the free portion bears against a valve seat and that, in order to bring about an open configuration, the free portion, from the closed configuration, can be elastically bent away from the valve seat, and an actuating device which is designed to transfer the leaf spring from the closed configuration to an open configuration against an elastic reset force of the leaf spring.

According to an embodiment of the disclosure, an apparatus for a flow of fluid includes a first and a second element that form an exponentially changing restriction between them for a flow of a fluid. At least one of the first and second elements is configured to move in response to changing pressures to change the restriction. One of the first and second elements includes a wall with one or more cutouts that have an admittance that changes exponentially with respect to the movement of the first or second element.

A valve device is capable of precisely adjusting a flow rate variation with time, aging, or the like without using an external sensor or using as few external sensors as possible. The apparatus includes an adjusting actuator for adjusting the position of the operating member positioned at the open position, a communication unit for receiving adjustment information relating to the adjustment of the opening degree of the flow path by the valve element from the outside of the apparatus, and a control unit for adjusting the position of the operating member by driving the adjusting actuator based on the adjustment information.

A fluid distribution system includes a mass flow controller and a first manifold assembly. The mass flow controller includes first and second end ports each extending from a lower end of the mass flow controller, proximate corresponding first and second sides of the mass flow controller, for lateral flow through the mass flow controller from the first end port to the second end port. The first manifold assembly includes a first end connection coupled to the first end port of the mass flow controller. The first manifold assembly includes a first manifold body extending parallel to the first side of the mass flow controller, and a plurality of first valve subassemblies retained in the first manifold body and arranged across a plane extending substantially parallel to the first side of the mass flow controller, with valve movement perpendicular to the first side of the mass flow controller.