A dual purpose valve assembly may comprise a conduit, a first valve, and a second valve. The first valve may comprise a vacuum breaker valve. The second valve may comprise a check valve. A drain system may comprise a supply tube, a drain tube, and a dual purpose valve disposed between the supply tube and the drain tube. The drain system may allow fluid to drain based on gravity alone, and the dual purpose valve assembly may operate based on gravity alone.

A valve mechanism includes: a cylindrical body; a plurality of valve bodies; and a drive valve. The drive valve includes a shaft portion having therein a flow path penetrating in the axial direction, and a step portion extending from an outer peripheral surface of the shaft portion to a radial outside of the shaft portion. The shaft portion has a tip portion which extends further on the cylindrical body side than the step portion. An outer diameter of the tip portion is smaller than an outer diameter of the step portion. A gap between the valve bodies is changed by elastically deforming an inner peripheral portion of the valve body, which comes into contact with the drive valve moved in a direction approaching the valve body, in a direction approaching the cylindrical body with respect to an outer peripheral portion of the valve body.

A coolant valve for a powertrain cooling system includes a housing and a valve member. The housing has a chamber, a first inlet port, a second inlet port, and an outlet port. The chamber has a first flat surface, a second flat surface, and a curved surface. The valve member has a first end, a second end opposite the first end, a flat middle portion, and a hinge portion disposed on the first end. The valve member is disposed in one of a first and a second position. When the valve member is disposed in the first position the outlet port is in communication with the first inlet port. When the valve member is disposed in the second position the outlet port is in communication with the second inlet port.

A supplementary mechanism that provides a temperature rise and fall effect to a machine tool spindle is mainly used to connect to pipelines between a machine tool spindle and a cooling device. The present invention provides an additional heating function to the spindle of the machine tool that originally has a cooling device, and still retains its original cooling function. The supplementary mechanism can provide the effect of raising and lowering the temperature. When cooling, the liquid provided by the cooling device is passed to directly cool the machine tool spindle. When raising the temperature, the flow path is switched, so that the liquid of the cooling device cannot flow to the machine tool spindle, and the liquid flowing out of the machine tool spindle forms an independent circulation channel, and the supplementary mechanism heats the liquid in the independent circulation channel, achieving the effect of rapid heating.

An inflation system includes a base, an adjuster and a first sealing device. The base is provided with a receiving cavity, an air inlet and an inflation inlet, the adjuster is rotatably configured in the receiving cavity, and the first sealing device is adapted for sealing the inflation inlet. The adjuster is turnable between a communication position and a separation position to open or close the inflation inlet, at the communication position, the first sealing device is openable under an action of high pressure air to communicate the inflation inlet with the air inlet; at the separation position, the adjuster stops high pressure air from opening the first sealing device thereby separating the inflation inlet from the air inlet. Different air passages can be selected in the invention, and the usage is convenient and safe.

A dual purpose valve assembly may comprise a conduit, a first valve, and a second valve. The first valve may comprise a vacuum breaker valve. The second valve may comprise a check valve. A drain system may comprise a supply tube, a drain tube, and a dual purpose valve disposed between the supply tube and the drain tube. The drain system may allow fluid to drain based on gravity alone, and the dual purpose valve assembly may operate based on gravity alone.

A pilot valve controlled mechanical shut-down valve. The mechanical shut-down valve includes a thermostatic motor that effectuates closing of the pilot valve when the temperature of fluid flowing through the shut-down valve is one of greater than a predetermined value, less than a predetermined value, or within a range of predetermined values. As a result thereof, flow through the shut-down valve is stopped.

A capacity control valve V includes a valve housing provided with a Pc port, a Pd port and a Ps port; a main valve body that includes a main valve portion which comes into contact with and separates from a main valve seat 10a to close and open a communication between a Pd port and the Pc port using a driving force of a solenoid; a pressure-sensitive valve capable of opening and closing, depending on a surrounding pressure, a first communication passage through which the Pc port and the Ps port are communicable with each other; and a differential pressure valve capable of opening and closing, depending on a pressure difference, a second communication passage through which the Pc port and the Ps port are communicable with each other.

A valve device for a cooling water system of a motor vehicle, with a housing including a first connection and a second connection for a first liquid circuit, and a third connection and a fourth connection for a second liquid circuit, wherein the first connection is permanently fluidically connected to the second connection, and with a valve unit including a movably mounted valve element with which a thermally activatable spring element is associated, and which opens a connection between the third connection and the fourth connection in a first end position and cuts off the connection in a second end position. The thermally activatable spring element is arranged in a chamber located between the first connection and the second connection, which is permanently cut off from the third and the fourth connection and which preloads the valve element in the direction of the second end position.

[Object] An electric valve control device capable of preventing a start delay of an electric valve control (an opening degree control) by shortening a waiting period of a system control device and an electric valve device including the same are provided. [Solving Means] An electric valve control device 11 outputs a signal indicating an end or an interruption of an initialization operation to an air conditioner ECU 16 after the initialization operation of the electric valve 9 ends or is interrupted.