A valve for applying an emergency brake of a rail vehicle includes a valve housing, an actuation member to be activated by a user, an actuation rod connecting the actuation member with a valve head, wherein the valve head is adapted to abut on a valve seat, a guidance for guiding the actuation rod being provided within the valve housing, and a first spring adapted to push the valve head against the valve seat, wherein the actuation rod includes a first groove and a second groove, and wherein a first following member is provided between the actuation rod and the guidance, being adapted to stably rest in the first groove or the second groove.

A flow control device includes a housing with an inlet and an outlet and a flow conduit disposed in the housing. The inlet, the flow conduit, and the outlet define a flow passage. A valve seat is disposed in the housing downstream of the inlet, and a shuttle is movably disposed in the housing and displaceable between a closed position engaging the valve seat to close the flow passage and an open position spaced from the valve seat to open the flow passage. A sealed chamber is defined between the housing and the flow conduit. A port coupled with a source of pressurized fluid communicates with the sealed chamber, where the shuttle is displaceable between the closed position and the open position based on a pressure in the sealed chamber. The threshold water pressure for displacing the flow conduit may be adjustable by modifying the pressure in the sealed chamber.

The present invention relates to a linear compressor. The linear compressor according to an aspect of the present invention includes a spring axially elastically supporting a driving assembly. The spring includes a spring body axially extending, a front spring link forming an end of the spring body by extending from a side of the spring body, and a rear spring link forming the other end of the spring body by extending from the other side of the spring body. Any one of the front spring link and the rear spring link is fixed to the driving assembly and the other one is fixed to a supporting assembly.

An active fluid static elimination system installed in a fluid transportation pipeline includes a solenoid valve, an electrostatic measuring device, a fluid destaticizer, and a controller. The solenoid valve is connected to a connecting port of the fluid transportation pipeline, and the electrostatic measuring device is used to measure an electrostatic value of a fluid in the fluid transportation pipeline. The fluid destaticizer is connected to the solenoid valve, and the controller is connected to the electrostatic measuring device and the solenoid valve. The solenoid valve is opened to allow the fluid passing through the fluid destaticizer to eliminate the electrostatic charge of the fluid when the controller determines that the electrostatic value measured by the electrostatic measuring device is greater than a predetermined value.

A piston check valve system includes a body including an upstream end and a downstream end, a bonnet secured to a proximal opening of the body, and a piston secured within the body, the piston being moveable between a closed position in which the piston rests upon a valve seat and an open position in which the piston is spaced away from the valve seat. The piston check valve system also includes a retainer configured to guide and retain the piston and to secure the valve seat within the body.

A pressure reducing valve includes: a body, a valve seat, and a valve element opening and closing the valve seat according to a difference between a pressure on the inlet side and a pressure on the outlet side. A pressure chamber, which is a space part between the valve element and the valve seat, is provided on the inlet side of the valve element. The valve element includes a plurality of horizontal holes each opening to the pressure chamber, and a vertical hole bringing the horizontal holes and the outlet side of the valve element into communication with each other. The horizontal holes and the vertical hole are provided in such a manner that a value of a ratio of a flow channel area of the vertical hole to a total area that is a total of flow channel areas of the horizontal holes exceeds 1.16.

A check valve may be used to enable desired flow rates of fluid in a particular direction. In some examples, the check valve may have a hollow cylindrical body and a threaded portion on an exterior wall of the hollow cylindrical body such that the check valve may be coupled with an assembly, such as an adapter for a vehicle engine. The check valve may include a plunger having a dome shaped portion (e.g., cone shaped, semi-hemispherical shaped, rounded cone shaped, etc.) that extends out of the hollow cylindrical body into free space when the check valve is in an open position and forms a seal with the hollow cylindrical body when the check valve is in a closed position.

A valve suitable for an air spring includes a housing body with a central longitudinal axis and channel. The housing body has a first valve opening fluidically connectable to an air spring volume, a second valve opening fluidically connectable to an air supply, which is fluidically connectable to an air spring volume, and a second valve opening which is fluidically connectable to an air supply. Each valve opening is fluidically connected or selectively connectable to the channel. A pressure limiter is provided to limit the pressure flowing out of the second valve opening, the pressure limiter including a third sealing agent and a second sealing agent associated with the second valve opening and selectively closing an opening, wherein pressurization of at least the third sealing agent displaces the second sealing agent due to the forced coupling such that it closes the corresponding opening or reduces the effective opening cross-section.

Methods, apparatus, systems and articles of manufacture are disclosed for valve body apparatus for use with fluid valves. An example fluid valve apparatus includes a valve body including a housing positioned on an exterior surface of the valve body, a calibration set screw disposed in the housing via a recessed aperture, and a cover coupled to the housing to seal the calibration set screw from external access.

A gas check valve device having a header, at least one check valve plunger, at least one orifice that provides a first path for a small amount of gas to pass through the at least one check valve plunger when a respective compression spring presses the check valve plunger against a check valve seat to form an air tight seal, and a common gas passage connecting the check valve plunger with a common outlet. The gas check valve device provides a second path for a small amount of gas to pass through the orifice of the at least one check valve plunger in a reverse direction and a larger amount of the gas to pass between the at least one check valve plunger and the check valve seat when the gas pressure compresses the respective compression spring to separate the check valve plunger from the check valve seat.