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 fuel tank isolation solenoid valve for a vehicle includes: a plunger disposed in the isolation solenoid valve to be vertically moved and has first vent holes for releasing overpressure or over-negative pressure; a valve body disposed in the isolation solenoid valve to be vertically moved and has second vent holes for releasing overpressure or over-negative pressure.

A pressure relief valve for a reservoir has a housing body forming first and second subchambers in fluid communication. A first opening in a bottom surface of the housing body forms a first valve seat. At least one second opening in the bottom surface forms a second valve seat along an outer perimeter. A diaphragm member is biased against the second valve seat and is configured to deflect off of the second valve seat under a negative pressure. A sealing ball is gravitationally biased against the first valve seat and raises off the first valve seat in response to a positive pressure. A cover sheet on an upper surface of the housing body partially encloses the chamber and traps the sealing ball in the first subchamber. The cover sheet includes an aperture aligned with the second subchamber providing an ambient pressure port coupled to ambient atmosphere.

A pressure relief valve for a reservoir has a housing body forming first and second subchambers in fluid communication. A first opening in a bottom surface of the housing body forms a first valve seat. At least one second opening in the bottom surface forms a second valve seat along an outer perimeter. A diaphragm member is biased against the second valve seat and is configured to deflect off of the second valve seat under a negative pressure. A sealing ball is gravitationally biased against the first valve seat and raises off the first valve seat in response to a positive pressure. A cover sheet on an upper surface of the housing body partially encloses the chamber and traps the sealing ball in the first subchamber. The cover sheet includes an aperture aligned with the second subchamber providing an ambient pressure port coupled to ambient atmosphere.

A transformer including a transformer tank, an expansion tank, and piping connecting the tanks enabling liquid to flow there between. The piping includes a valve configured for liquid to flow from the transformer to the expansion tank when the pressure is above a predefined first threshold and for preventing the liquid to flow from the transformer to the expansion tank when the pressure is below the first threshold. The valve is also configured for liquid to flow from the expansion to the transformer tank when the pressure is below a predefined second threshold and for preventing the liquid to flow from the expansion to the transformer tank when the pressure is above the predefined second threshold.

A transformer including a transformer tank, an expansion tank, and piping connecting the tanks enabling liquid to flow there between. The piping includes a valve configured for liquid to flow from the transformer to the expansion tank when the pressure is above a predefined first threshold and for preventing the liquid to flow from the transformer to the expansion tank when the pressure is below the first threshold. The valve is also configured for liquid to flow from the expansion to the transformer tank when the pressure is below a predefined second threshold and for preventing the liquid to flow from the expansion to the transformer tank when the pressure is above the predefined second threshold.

A device that equalizes an aircraft pressure difference has a separating wall, fixable to the aircraft, and a decompression valve. The wall is for fluidically separating first and second spaces, and has a flow opening that fluidically connects the spaces. The valve closes the flow opening. A securing element on the valve or wall enables a release of the valve when a pressure gradient between the spaces is exceeded, such that there is a fluidic connection between the spaces. The receiving element on the wall or valve is connected to the receiving element. The securing element has a rotary element and fixing elements. The rotary element is rotatably mounted about a rotational shaft. The rotary element is receivable in the receiving element. The fixing elements non-rotatably fix the rotary element beneath the predetermined pressure gradient. At least one of the fixing elements is a spring.

A device that equalizes an aircraft pressure difference has a separating wall, fixable to the aircraft, and a decompression valve. The wall is for fluidically separating first and second spaces, and has a flow opening that fluidically connects the spaces. The valve closes the flow opening. A securing element on the valve or wall enables a release of the valve when a pressure gradient between the spaces is exceeded, such that there is a fluidic connection between the spaces. The receiving element on the wall or valve is connected to the receiving element. The securing element has a rotary element and fixing elements. The rotary element is rotatably mounted about a rotational shaft. The rotary element is receivable in the receiving element. The fixing elements non-rotatably fix the rotary element beneath the predetermined pressure gradient. At least one of the fixing elements is a spring.

A vent control valve includes: a first case shaped in a tube that forms a passage for ventilation; a movable valve object arranged in the first case to open and close the passage; an inner case arranged in the first case to support the movable valve object; a second case disposed at a lower end of the first case; a first connection mechanism defined between the first case and the inner case, the first connection mechanism connecting the first case and the inner case with each other; and a second connection mechanism defined between the first case and the second case, the second connection mechanism connecting the first case and the second case with each other.

A pilot valve assembly, for operating a pressure reducing valve disposed within a fuel tank, can include a housing including a first chamber and a second chamber, a first port in fluid communication with the first and second chambers, the first port being configured to receive an atmospheric pressure, a second port in fluid communication with the first and second chambers, the second port being configured to receive a fuel tank pressure, a first pilot valve arranged within the first chamber and configured to open only when a predetermined positive pressure differential exists between the first and second ports, and a second pilot valve arranged within the second chamber and configured to open only when a predetermined negative pressure differential exists between the first and second ports.