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A latching valve is a type of valve that is designed to stay either open or closed without continuous power. A latching valve allows the user to pulse the valve and have it change state. The voltage does not need to be constantly applied in
order to hold it in a state. Latching valves are ideal for controlling larger pneumatic valves in remote applications where power is limited or when the temperature of the media cannot be impacted as it flows through the valve. 
The larger pneumatic valves can close and open large pipes and these latching valves control them. The term “latch” refers to the valve in the open state where supply pressure goes to the external valve. The unlatched state is when the
supply is cut off and the external valve is exhausted to ambient.
Gems Sensors and controls designs and manufactures 2-and 3-way latching valves, including the BL Series latching valve.
Latching valves can be used for the following common applications:
- Natural gas plunger lifts
- Natural gas separators
- Gas chromatography
- Irrigation systems
- Laboratory applications
- Medical applications
- Applications that have low energy resources
- Applications that are sensitive to temperature changes
- Other unique applications