A mounting aid device for mounting a valve slide in a housing bore of a valve housing of a slide valve includes a mounting slide arranged movably in a guide of a guide piece and protruding out of the guide of the guide piece on both sides. The guide piece includes a first stop, with which the guide piece is placeable coaxially to the housing bore when the guide piece contacts the valve housing at the first stop. The mounting slide configured to protrude into the housing bore until contact on the second end region of the valve slide and, by force-loading of the mounting slide under compression of the spring element, the valve slide is movable until the valve slide reaches the first end position.

A coil spring is disposed in a fluid passage between a cylindrical body and a valve element to urge the valve element toward a closed position. The coil spring comprises a valve support portion supporting the valve element, a secured portion secured to an inner peripheral surface of the fluid passage, an expanding-contracting portion extending from the secured portion, and a connecting portion between the expanding-contracting portion and the valve support portion. The connecting portion comprises a first portion curved so as to pass radially outward of an end winding portion of the expanding-contracting portion, a second portion passing through the center of the valve support portion, a third portion extending curvedly so as to overlap the first portion, and a fourth portion extending to the valve support portion. When the coil spring is compressed, the valve support portion is supported to the expanding-contracting portion 54 through the connecting portion.

The disclosed technology can include a bypass valve assembly having a partition that can fluidly separate an inlet and an outlet of a fluid heating system. A first bypass valve and a second bypass valve can be mounted to the partition and configured to permit a fluid to flow between the inlet and the outlet. The first bypass valve and the second bypass valve can be configured to transition between a closed state and an open state. The first bypass valve and the second bypass valves can each have a spring configured to transition the respective first and second bypass valve from the closed state in response to experiencing a pressure that is greater than or equal to a respective first or second predetermined pressure. The second predetermined pressure can be greater than the first predetermined pressure.

A fluid end includes a fluid end block defining a chamber. A plunger is disposed in the chamber. An outlet fluid passage is formed in the fluid end block in communication with the fluid chamber. An inlet fluid passage formed in the fluid end block communicates with the fluid chamber. The inlet fluid passage includes a seat, an enlarged diameter downstream from the seat, and a neck downstream of the enlarged diameter. The neck has a lesser diameter than the enlarged diameter. An inlet valve is movably disposed in the inlet fluid passage and is sized and shaped to seal against the seat. A biasing member has a first and second end with respective first diameter and a second diameter disposed within the enlarged diameter. The second end is positioned against the neck. The second end diameter is greater than the neck.

A blow-off metering valve for a hydraulic control unit assembly of a brake system including a valve seat. The valve seat includes a wall that extends about an axis between a first end and a second end. The wall defines a passage that extends axially between the first and second ends for transmitting a fluid through the valve seat. An annular flange extends axially from the second end of the wall toward the first end of the wall and tapers radially inwardly. A blocking member is axially movable toward and away from the annular flange for selectively creating a seal at the passage. A biasing element biases the blocking member toward the annular flange. The annular flange terminates at a distal end that is radially spaced from the wall. The annular flange defines at least one flow channel that extends axially for allowing fluid to bypass the blocking member.

A check valve includes a valve element and a valve body having a body housing, an annular valve seat insert, a bushing, and a biasing member. The body housing includes an outer circumferential wall extending between an inlet port and an outlet port to define a valve cavity therebetween. The valve seat insert is seated in a body seat surface surrounding the inlet port. The bushing is disposed in the valve cavity and defines a central bore, with the bushing including an outboard end surface axially engageable with the valve seat insert. The biasing member is disposed between a bearing portion of the body housing and an inboard end of the bushing to allow for axial movement of the bushing with respect to the body seat surface. The valve element extends through the bushing central bore and is movable between a closed position and an open position.

A valve device for a fuel tank of a motor vehicle includes, for example, a housing having a tank connection for connecting the valve device to a vent line going to or coming from the fuel tank, and a filter connection for connecting the valve device to a vent line going to or coming from an activated charcoal filter. The tank connection and the filter connection are fluidically connected to one another inside the housing through a vent duct. A valve is arranged inside the housing for opening and at least partially closing the vent duct, wherein the valve has a valve element that is movably mounted between an opening position and a closed position inside the housing along a longitudinal axis of the housing. An actuating element is accessible from outside the valve device, which is movably mounted along the longitudinal axis inside the housing and motion-coupled in such a way with the valve element that a movement of the actuating element in a closing direction moves the valve element in closing direction. A valve element return element is configured to move the valve element in an opening direction, and arranged outside the vent duct, between the valve element and the housing.

A coil spring is disposed in a fluid passage between a cylindrical body and a valve element to urge the valve element toward a closed position. The coil spring comprises a valve support portion supporting the valve element, a secured portion secured to an inner peripheral surface of the fluid passage, an expanding-contracting portion extending from the secured portion, and a connecting portion between the expanding-contracting portion and the valve support portion. The connecting portion comprises a first portion curved so as to pass radially outward of an end winding portion of the expanding-contracting portion, a second portion passing through the center of the valve support portion, a third portion extending curvedly so as to overlap the first portion, and a fourth portion extending to the valve support portion. When the coil spring is compressed, the valve support portion is supported to the expanding-contracting portion 54 through the connecting portion.

A blow-off metering valve for a hydraulic control unit assembly of a brake system including a valve seat. The valve seat includes a wall that extends about an axis between a first end and a second end. The wall defines a passage that extends axially between the first and second ends for transmitting a fluid through the valve seat. An annular flange extends axially from the second end of the wall toward the first end of the wall and tapers radially inwardly. A blocking member is axially movable toward and away from the annular flange for selectively creating a seal at the passage. A biasing element biases the blocking member toward the annular flange. The annular flange terminates at a distal end that is radially spaced from the wall. The annular flange defines at least one flow channel that extends axially for allowing fluid to bypass the blocking member.

The disclosed technology can include a bypass valve assembly having a partition that can fluidly separate an inlet and an outlet of a fluid heating system. A first bypass valve and a second bypass valve can be mounted to the partition and configured to permit a fluid to flow between the inlet and the outlet. The first bypass valve and the second bypass valve can be configured to transition between a closed state and an open state. The first bypass valve and the second bypass valves can each have a spring configured to transition the respective first and second bypass valve from the closed state in response to experiencing a pressure that is greater than or equal to a respective first or second predetermined pressure. The second predetermined pressure can be greater than the first predetermined pressure.