Latching solenoid valves available brass, stainless, plastic sizes 1/8 to 2" both direct acting and pilot pressure assisted to suit most applications for air, water, oil, vacuum, fuel, diesel, petrol, steam, mains water and many other fluids and gases including slightly agressive media. Latching valves require only a single electrical power pulse to open, the valve will remain in the open position without additional electrical power. To close the valve simply reverse the electrical polarity and and apply 1 short electrical power pulse to solenoid which will close and remain closed. Reverse the polarity again and repeat the sequence, no continuous electrical power supply required just only a short ~20 millisecond electrical pulse. Ideal for battery powered applications, ideal for low power and low heat generation and also a very green enviromentally eco friendly way to control the flow of liquid and gas media.