In Operational efficiency and energy consumption saving, the use of automatic control valve is an essential part. The manual valve and pneumatic valve which were commonly used in traditional industrial is inferior to the motorized valve both the installation cost and efficiency.

Speaking of the product itself, the motorized valve is the best choice for the entrepreneur because it has so many merits: easy to assemble, the low failure rate as well as conforms to the field automation demand.

The expert indicated that the valve class in the industry flow, mostly uses for controlling each kind of fluid marching forward and the current capacity, like water, oil, and chemistry liquid and so on, resting on the parameter of the temperature, the pressure and the current capacity. the factory always use pressure relief valve, the air operated to decide the warm valve, the solenoid valve to decide the warm system, the proportion type control valve to decide the warm system, the temperature control valve and so on.

When selects each kind of self acting valve, we should take heat engine