It is suitable for 0.5 inch, 0.8 inch and 1 inch different models of new and old pipeline gas ball valve and butterfly valve. It is easy to install, without changing the original design configuration of gas pipeline that users can install it by themselves; 0.5 inch and 0.8 inch valves can be opened and closed easily by the super torque of metal reduction gear. Three key remote operate opening, closing and stopping of switch, and it can be operate free by pulling down the clutch. It is safe and reliable with zero power consumption that it can stop the electronic automatically when it moves to the limited angel. it can also be used in smart flower watering, pet drinking water supply, home automation water supply , smart water supply system of aquaculture plant, automatic fuel supply system of equipment, etc.