A balance valve, a battery, and a power consumption apparatus are provided in the embodiments of the present application. The balance valve includes a body, a breathable membrane and a gas barrier structure, where the body is provided with a ventilation channel; the breathable membrane is arranged at one end of the ventilation channel; and, the gas barrier structure is arranged at the other end of the ventilation channel, and the gas barrier structure is configured to open the ventilation channel when the gas pressures inside and outside the gas barrier structure are unbalanced, so as to achieve the gas pressure balance between the inside and outside of the gas barrier structure. The balance valve is applicable to a battery, which could achieve a balance of gas pressures inside and outside the battery when there is a pressure difference between the inside and outside of the battery.

A first diaphragm and a second diaphragm are disposed between a valve element and a body, a diaphragm chamber is formed between the first diaphragm and the second diaphragm, the first diaphragm separates a valve chamber from the diaphragm chamber, and the second diaphragm separates the diaphragm chamber from a back pressure chamber. The diaphragm chamber communicates with an output port, the valve chamber and the back pressure chamber communicate with an input port. A difference between an effective pressure receiving area of the first diaphragm and an effective pressure receiving area of the second diaphragm is equivalent to a passage area in a valve seat.

A valve device includes a flow channel member having a first flow channel, an electromagnetic valve having a movable piece movable in a predetermined direction and being capable of opening and closing the first flow channel, and a valve seat body fixed to the first flow channel. The first flow channel has a first flow channel main body and an opening connected to one end of the first flow channel main body with a step therebetween. The valve seat body has a fixed part fitted into an inside of the opening, an extension which extends from the fixed part, a circulation hole which penetrates the fixed part and the extension, and a valve seat which is provided at an end of the circulation hole. The movable piece has a valve body which is able to be seated in the valve seat from one side in the predetermined direction.

A valve device includes a flow channel member having a first flow channel, an electromagnetic valve having a movable piece movable in a predetermined direction and being capable of opening and closing the first flow channel, and a valve seat body fixed to the first flow channel. The first flow channel has a first flow channel main body and an opening connected to one end of the first flow channel main body with a step therebetween. The valve seat body has a fixed part fitted into an inside of the opening, an extension which extends from the fixed part, a circulation hole which penetrates the fixed part and the extension, and a valve seat which is provided at an end of the circulation hole. The movable piece has a valve body which is able to be seated in the valve seat from one side in the predetermined direction.

An electromagnetic valve includes a mover that is able to move in a predetermined direction. The mover includes a valve body part including a valve body base part and an annular elastic body. The valve body base part includes a large diameter part and a small diameter part connected via a step difference. The annular elastic body includes a first contact surface, a second contact surface in contact with a step difference surface in the step difference, and a sealing projecting part that is able to come into contact with a peripheral edge part of an opening part of a first flow path in the predetermined direction. The sealing projecting part surrounds the opening part when seen in the predetermined direction. The sealing projecting part, the second contact surface, and the step difference surface are at least partially superimposed on each other when seen in the predetermined direction.

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 flow regulating switch valve includes a valve core that includes a switch assembly configured to drive a diaphragm assembly to open or close a water outlet, and also includes a flow regulating assembly that comprises a rotating ring, a sliding block, and a magnet. A control key is configured to control the switch assembly. The rotating ring is connected to the control key and includes an inclined plane that transitions from high to low and is configured to drive the sliding block to slide up and down such that the sliding block drives the magnet to move up and down. The magnet is configured to control the diaphragm assembly to regulate a size of the water outlet.

A choke valve for regulating a flow rate, a pressure or other parameters of a fluid flow may comprise a choke cage comprising a passage therethrough and a choke plug slidable within the passage. At least one conduit may pass through a wall of the choke cage and into the passage such that as the choke plug slides it may at least partially cover the conduit. A ring comprising a sintered superhard material may be secured within the conduit enhancing durability and wear resistance of the choke cage. A method for manufacturing such a choke cage may comprise subjecting grains of superhard material to high-pressure, high-temperature conditions sufficient to sinter at least some of the grains together, hollowing out the sintered superhard material to form a ring, and securing the ring within a conduit.

A double action directional fluid flow valve includes a stepped piston connected with a poppet valve and moveable by a controller between open and closed positions by applying a continuous pressure to a small diameter piston face and selectively applying and removing pressure from a large diameter piston face to move the poppet valve between an open position and a closed position.