A servo valve for an actuator comprises a housing, a sleeve provided within the housing comprising an axis (A) and having a plurality of metering holes for communication with a cavity within. A metering rod extends within the cavity for metering flow of pneumatic fluid through the metering holes. The metering rod is coupled to a drive unit for axial movement within the cavity, the drive unit comprising a drive unit housing, a solenoid and an adjustable core. The adjustable core comprises a threaded first portion having a thread and a second portion. The thread of the first portion engages a thread extending through the drive unit housing for adjustment of the relative position of the adjustable core with respect to the solenoid.

A servo valve for an actuator comprises a housing, a sleeve provided within the housing comprising an axis (A) and having a plurality of metering holes for communication with a cavity within. A metering rod extends within the cavity for metering flow of pneumatic fluid through the metering holes. The metering rod is coupled to a drive unit for axial movement within the cavity, the drive unit comprising a drive unit housing, a solenoid and an adjustable core. The adjustable core comprises a threaded first portion having a thread and a second portion. The thread of the first portion engages a thread extending through the drive unit housing for adjustment of the relative position of the adjustable core with respect to the solenoid.

A device and method for dispensing a flowable medium has a housing with an interior space and a rod mounted in the housing that is movable between a first end position and a second end position and passes through a diaphragm mounted in a sealed manner in the housing radially on the outside and in the rod radially on the inside. The diaphragm divides the interior space into a first cavity and a second cavity separated from the first cavity in a fluid tight manner. The flowable medium can flow through at least one channel that opens into the first cavity, and is dispensed through a dispensing opening. A sealing section of the rod closes the dispensing opening in the first end position and is at a distance from the dispensing opening in the second end position. A pressure medium acts on the diaphragm in the second cavity.

A device and method for dispensing a flowable medium has a housing with an interior space and a rod mounted in the housing that is movable between a first end position and a second end position and passes through a diaphragm mounted in a sealed manner in the housing radially on the outside and in the rod radially on the inside. The diaphragm divides the interior space into a first cavity and a second cavity separated from the first cavity in a fluid tight manner. The flowable medium can flow through at least one channel that opens into the first cavity, and is dispensed through a dispensing opening. A sealing section of the rod closes the dispensing opening in the first end position and is at a distance from the dispensing opening in the second end position. A pressure medium acts on the diaphragm in the second cavity.

A proportional pinch valve for controlling the pressure of a fluid in a continuous flow system comprises an anvil for pinching a length of a tubing in the continuous flow system, and a drive mechanism including a displacement element for moving the anvil towards the tubing. The anvil is indirectly coupled to the displacement element via an elastic spring element. The elastic spring element provides a defined play (i.e. elasticity) for the anvil at least as long as the tubing is not fully pinched so that displacement of the anvil is force-controlled by the elastic spring element. A method of controlling the pressure of a fluid in a continuous flow system makes use of such a proportional pinch valve.

A proportional pinch valve for controlling the pressure of a fluid in a continuous flow system comprises an anvil for pinching a length of a tubing in the continuous flow system, and a drive mechanism including a displacement element for moving the anvil towards the tubing. The anvil is indirectly coupled to the displacement element via an elastic spring element. The elastic spring element provides a defined play (i.e. elasticity) for the anvil at least as long as the tubing is not fully pinched so that displacement of the anvil is force-controlled by the elastic spring element. A method of controlling the pressure of a fluid in a continuous flow system makes use of such a proportional pinch valve.

A servo valve for an actuator is described. The servo valve comprises a housing having a plurality of ports, a sleeve disposed within the housing, the sleeve comprising an axis (A), an inner surface defining a cavity for the servo valve and a plurality of metering holes, each in communication with one of the ports, and a metering rod extending axially in the cavity for reciprocation along the axis to meter flow through the metering holes. The servo valve additionally comprises a first spring seal extending between the metering rod and the sleeve to close off a first end of the cavity and a second spring seal extending between the metering rod and the sleeve to close off a second, opposite end of the cavity.

A servo valve for an actuator is described. The servo valve comprises a housing having a plurality of ports, a sleeve disposed within the housing, the sleeve comprising an axis (A), an inner surface defining a cavity for the servo valve and a plurality of metering holes, each in communication with one of the ports, and a metering rod extending axially in the cavity for reciprocation along the axis to meter flow through the metering holes. The servo valve additionally comprises a first spring seal extending between the metering rod and the sleeve to close off a first end of the cavity and a second spring seal extending between the metering rod and the sleeve to close off a second, opposite end of the cavity.

A control valve body has a flow passage including an inlet, an outlet, a first portion, and a second portion, the first portion having a first axis centered through the inlet, a first bend, and a second axis, the second portion having a third axis centered through the outlet, a second bend, and a fourth axis, the fourth axis perpendicular to the second axis. The first portion is to an upstream side of a junction of the first portion and the second portion, and the second portion is to a downstream side of the junction. The second axis is centered through the junction. An opening to the second portion has a fifth axis aligned with the second axis.

A control valve body has a flow passage including an inlet, an outlet, a first portion, and a second portion, the first portion having a first axis centered through the inlet, a first bend, and a second axis, the second portion having a third axis centered through the outlet, a second bend, and a fourth axis, the fourth axis perpendicular to the second axis. The first portion is to an upstream side of a junction of the first portion and the second portion, and the second portion is to a downstream side of the junction. The second axis is centered through the junction. An opening to the second portion has a fifth axis aligned with the second axis.