A means of creating a novel, balanced, plunger valve. It is designed by combining the valve seats with the valve stem by varying the diameter of the valve stem. While the valve is closed it experiences minimal net force, but once opened, the working fluid assists in minimizing the response time of the valve. This creates a very efficient dump valve. The design limits the number of components needed for the valve to be assembled which reduces the cost, simplifies the maintenance, enhances the strength, and creates a more reliable valve. The following includes several methods of accomplishing this.

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.

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.

A fluidic valve may include an inlet, a control port, an additional control port, an outlet, a fluid channel configured to convey fluid from the inlet to the outlet, and a piston that includes (1) a restricting gate transmission element configured to block, when the piston is in a first position, the fluid channel and unblock, when the piston is in a second position, the fluid channel, (2) a controlling gate transmission element configured to interface with a control pressure from the control port that forces the piston towards the first position when applied to the controlling gate transmission element, and (3) an additional controlling gate transmission element configured to interface with an additional control pressure from the additional control port that forces the piston towards the second position when applied to the additional controlling gate transmission element. Various other related devices, systems, and methods are also disclosed.

A fluidic valve may include an inlet, a control port, an additional control port, an outlet, a fluid channel configured to convey fluid from the inlet to the outlet, and a piston that includes (1) a restricting gate transmission element configured to block, when the piston is in a first position, the fluid channel and unblock, when the piston is in a second position, the fluid channel, (2) a controlling gate transmission element configured to interface with a control pressure from the control port that forces the piston towards the first position when applied to the controlling gate transmission element, and (3) an additional controlling gate transmission element configured to interface with an additional control pressure from the additional control port that forces the piston towards the second position when applied to the additional controlling gate transmission element. Various other related devices, systems, and methods are also disclosed.

A valve may have a fluid inlet and a fluid outlet. The valve may include a valve stem having a lumen extending from a first opening at a proximal portion of the valve stem to a second opening at a distal end of the valve stem. A plurality of seals may be positioned relative to the valve stem. The valve stem and seals may be configured so that a fluid entering the inlet is prevented from flowing to the outlet in a first position of the valve stem and relative to the inlet and the outlet. The valve stem and the seals may be configured so that a fluid entering the inlet flows to the outlet in a second position of the valve stem relative to the inlet and the outlet, the second position being more distal than the first position relative to the inlet and the outlet.

An inlet section for use in a hydraulic distributor including a valve body and a slider with a first area and a second area. The inlet section further including said slider being longitudinally slidable within the valve body between a first position in which it prevents passage of fluid from a high pressure line to a low pressure line, and a second position in which it enables passage of fluid. The inlet section further including a main spring active on the second area of the slider in a direction consistent with action of the second pressure and a control device of the slider. The control device of the slider includes a mechanical actuator member selectively active on the slider in a direction consistent with the action of the first pressure on the first area of the slider so as to force the slider in the second position.

A spool valve device includes: a housing with channels; a spool moving to change channel connection statuses; an electric actuator including an electric motor and linear-motion conversion mechanism, the motor rotating an output shaft by torque corresponding to a drive current supplied to the motor, the mechanism converting rotational output shaft movement into straight movement and applying thrust corresponding to the torque to the spool to change position; a biasing member applying biasing force to the spool against the actuator thrust; an angle detector detecting an motor output shaft angular position; a driving portion driving the motor by controlling drive current flow supplied to the motor based on a position command input and the angular position detected by the angle detector; and an abnormality determining portion calculating the spool position based on the detected angular position and determine presence or absence of operation spool abnormality.

A safety air valve switch for a pressurized air line is provided. The valve may be in the form of an exterior sliding sleeve. The safety air valve switch for a pressurized air line moves between an open and a closed position. In the open position the safety air valve allows pressurized air to flow through an air line of, for example, a tire inflation hose. In the closed position the safety air valve switch prohibits the flow of air through the air line. The safety valve allows for safe venting of pressurized air when switching between the open and closed position.

The invention relates to the field of bath products, and provides a flow control device. The flow control device comprises a movable rod capable of reciprocating to switch water into different outlet passages, wherein a flow control part circumferentially extends and protrudes out of the movable rod, and the movable rod rotates to drive the flow control part to rotate to control the flow in the corresponding outlet passage. During use, the movable rod is pressed to control the switching the outlet passages, and users can select the position where water is discharged as required, for example, water is discharged upwards or downwards. Moreover, the movable rod rotates to drive the flow control part to rotate to flexibly control the flow of a certain outlet, such as the upward outlet flow, to facilitate daily washing of the users.