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.

A vacuum breaking device for a vacuum generator, includes a main housing, wherein the main body is provided with an air supply port, a vacuum interface chamber and a vacuum generating chamber. An intake passage is arranged inside the main housing, a pilot valve controlled by an electromagnetic pilot valve assembly is arranged between the intake passage and the air supply port. The pilot valve includes a pilot valve body, a pilot valve core and a pilot valve spring. A throttle pipe is arranged axially inside the main housing. A pneumatic on-off valve is arranged between the vacuum interface chamber and the vacuum generating chamber and outside the throttle pipe. The pneumatic on-off valve includes a slide core and a slide core spring, and a control chamber mated with an end surface of the slide core is arranged inside the main housing.

A vacuum breaking device for a vacuum generator, includes a main housing, wherein the main body is provided with an air supply port, a vacuum interface chamber and a vacuum generating chamber. An intake passage is arranged inside the main housing, a pilot valve controlled by an electromagnetic pilot valve assembly is arranged between the intake passage and the air supply port. The pilot valve includes a pilot valve body, a pilot valve core and a pilot valve spring. A throttle pipe is arranged axially inside the main housing. A pneumatic on-off valve is arranged between the vacuum interface chamber and the vacuum generating chamber and outside the throttle pipe. The pneumatic on-off valve includes a slide core and a slide core spring, and a control chamber mated with an end surface of the slide core is arranged inside the main housing.

Certain embodiments provide a vitrectomy probe including a housing, an actuator disposed inside the housing, a cutter coupled to the actuator and extending from the housing and an air turbine disposed inside the housing. The air turbine includes a rotor and a plurality of turbine blades coupled to the rotor. The vitrectomy probe includes a valve body interfacing with the rotor. During rotation of the air turbine, air is selectively routed to and from the actuator according to a rotational position of the rotor in relation to the valve body, thereby reciprocating the cutter.

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.

An electropneumatic trailer supply module, for an electropneumatic parking brake system for a tractor vehicle/trailer combination, includes a supply connection configured to connect a compressed air supply, a trailer supply connection configured to deliver a supply pressure for a trailer vehicle, a pneumatically controlled main valve unit configured to provide the supply pressure to the trailer supply connection, and an electropneumatic pilot control unit configured to select at least a first control pressure at the pneumatically controlled main valve unit. When the first control pressure exceeds a predefined first threshold value of the pneumatically controlled main valve unit, the supply pressure provided to the trailer supply connection can be selected. When the first control pressure falls below the predefined first threshold value of the pneumatically controlled main valve unit, the trailer supply connection is configured to be vented.

A switching valve includes a sleeve on which a plurality of ports are disposed; a spool that is disposed inside the sleeve to move in an axial direction by a pilot hydraulic pressure to switch between switching lines each serving as a flow channel for hydraulic fluid that is formed by a combination of the ports; a first energizing unit that energizes the spool against the pilot hydraulic pressure; a relief hole that is disposed on the spool to discharge the hydraulic fluid with the pilot hydraulic pressure; a valve body that closes the relief hole; and a second energizing unit that energizes the valve body toward the relief hole of the spool against the pilot hydraulic pressure, and when the pilot hydraulic pressure exceeds a predetermined value, opens the relief hole.

A monitoring unit for a fluid storage receptacle includes a sensor to attach to the fluid storage receptacle and detect an amount of empty space between fluid contents of the fluid storage receptacle and the sensor, and a transmitter to receive and transmit data from the sensor. The monitoring unit also includes a proximity sensor to detect a presence of a beacon within a proximity range of the proximity sensor, a controller to selectively open a fluid control valve of the waste oil receptacle, or both the proximity sensor and the controller.

Method of adjusting the pressure balance or a control device, in particular of a servo valve, the requisite adjusting movement being applied by a disc translator.