A solenoid valve includes a main valve, a first auxiliary valve, a second auxiliary valve, a main valve body, and an auxiliary valve body. The main and auxiliary valve bodies are axially parallel and detachably connected. The main valve is mounted on the main valve body, the first and second auxiliary valves are mounted on the auxiliary valve body, which is provided with an air inlet, a cylinder port and an air discharging port. The air inlet communicates with the main valve through a first air passage. The cylinder port is sequentially in communication with the first and second auxiliary valves and the main valve through a second air passage. The air discharging port sequentially communicates with the first and second auxiliary valves and the main valve through a third air passage. The main and second auxiliary valves are solenoid valves. The first auxiliary valve is a hand-operated valve.

An integrated valve for a hydraulic tensioner includes a pressure relief valve with an integrated band, which is preferably made of metal, placed around the outside of a pressure relief valve body. A hydraulic tensioner includes a housing with a bore and a hollow piston slidably received within the bore. A piston spring biases the piston in a direction toward a power transmission device. The tensioner also includes an integrated check valve in a body of the housing. The integrated check valve includes a pressure relief valve mechanism and a band check valve mechanism surrounding a circumference of the pressure relief valve mechanism. The pressure relief valve mechanism permits transfer of pressurized fluid from a piston chamber formed by the hollow piston to the source of pressurized fluid and the check valve mechanism permits transfer of pressurized fluid from the source of pressurized fluid to the piston chamber.

A solenoid valve includes a main valve, a first auxiliary valve, a second auxiliary valve, a main valve body, and an auxiliary valve body. The main and auxiliary valve bodies are axially parallel and detachably connected. The main valve is mounted on the main valve body, the first and second auxiliary valves are mounted on the auxiliary valve body, which is provided with an air inlet, a cylinder port and an air discharging port. The air inlet communicates with the main valve through a first air passage. The cylinder port is sequentially in communication with the first and second auxiliary valves and the main valve through a second air passage. The air discharging port sequentially communicates with the first and second auxiliary valves and the main valve through a third air passage. The main and second auxiliary valves are solenoid valves. The first auxiliary valve is a hand-operated valve.

The device includes a main valve, first and second auxiliary valves, a valve body and a filter. The main, which has first and second auxiliary valves are mounted on the valve body, which has an air inlet, a cylinder port and an air discharging port. The air inlet is in communication with the main valve through a first air passage, the cylinder port is sequentially in communication with the first and second auxiliary valves, and the main valve through a second air passage. The air discharging port is sequentially in communication with the first and second auxiliary valves and the main valve through a third air passage. The main and the second auxiliary valves are solenoid valves, and the first auxiliary valve is a hand-operated valve. An air outlet of the filter is in communication with the air inlet. The filter is used for filtering out impurities in gas.

A first relief valve chamber (3) of a main relief valve (10) and a second relief valve chamber (7) of an auxiliary relief valve (11) are provided in series in a valve case 1. The first relief valve chamber (3) includes a valve seat chamber (4) at the right and a valve chamber (5) at the left. A first valve member (30) in the valve chamber (5) is biased toward a valve seat member (18) in the valve seat chamber (4) by a first relief spring (40). A second valve member (48) in the second relief valve chamber (7) is biased toward a second valve seat (47) by a second relief spring (50).

A ceramic valve core assembly including a movable valve plate which is rotatable and slidably attached on a fixed valve plate, the fixed valve plate has a first cold water inlet, a first hot water inlet, and a first water outlet. The movable valve plate has a first water inlet and a second water outlet in communication with the first water outlet. The first water inlet includes a filter mounting cavity and a water mixing cavity in communication with each another. By rotating the movable valve plate, the first cold water inlet, the first hot water inlet, or both the first cold water inlet and the first hot water inlet establish communication with the water mixing cavity. A lower edge of the second water outlet contacts an upper edge of the first water outlet. Thus, by moving the movable valve plate, a water passage is established.

An electropneumatic proportional flow control device improves electropneumatic control of pneumatically operated valves. A single integrated valve incorporates a proportional valve component in operational and physical coordination with a pressure regulator valve component. The flow path of fluid is initially passed through the regulator component whereby pressure is regulated to within a manageable range for operation of a balanced type proportional valve component.

The invention relates to a solenoid valve (1), in particular a shut-off valve for hydrogen tank systems, comprising a reciprocatingly movable magnetic armature (2) which is or can be coupled to a reciprocatingly movable valve element (3), the magnetic armature (2) being preloaded in the direction of the valve element (3) by means of a spring (4), the solenoid valve further comprising an annular solenoid coil (5) for acting on the magnetic armature (2), the solenoid coil (5) surrounding the magnetic armature (2) in portions. According to the invention, the magnetic armature (2) has a portion (2.1) designed as a plunger armature and a portion (2.2) designed as a flat armature, the portion (2.1) designed as a plunger armature delimiting a pressure chamber (6) within the solenoid coil (5), which pressure chamber is connected pneumatically, preferably via a choke (7), to a control chamber (8) which can be relieved by opening a control valve (9) which can also be actuated by means of the solenoid coil (5).

The invention also relates to a hydrogen tank system comprising a solenoid valve (1) according to the invention.

A valve device includes an inlet, an outlet connected to the inlet, a valve member having an open position in which fluid can pass from the inlet to the outlet, and a closed position in which fluid cannot pass from the inlet and the outlet, and an actuator. The actuator selectively actuates the valve member, and has an open actuator position and a closed actuator position. The valve has a first operating mode in which, over a whole of the range of operating values of the inlet pressure, the actuator is fixed in the open actuator position and the valve member is in the open valve position. In a second operating mode, the actuator switches from the closed actuator position to the open actuator position, switching the valve member from the closed valve position to the open valve position, when the inlet pressure exceeds a second threshold inlet pressure.

A valve may be mounted on a case that houses a battery. The valve may be configured to open and close a gas outlet through which gas inside the case escapes to outside of the case. The valve may include: a first valve body configured to open and close the gas outlet; an elastic member configured to press the first valve body toward the gas outlet; and a support configured to support the elastic member. The first valve body may include: a first pressure receiving surface facing inside of the case via the gas outlet; and a second pressure receiving surface located around the first pressure receiving surface. The second pressure receiving surface may be configured to receive a pressure of gas escaping from the gas outlet to the outside of the case when the first valve body opens the gas outlet.