The electric head generally includes a driver, which receives the driver signal (0-10V or 4-20MA) to control the valve electric device for adjustment, and can also constitute an intelligent network control system according to the control needs, optimize the control to realize remote monitoring, and the valve electric head is suitable. Installed at the upper end of the working piston in the lower part of the horizontal pipeline, the temperature sensor can be installed in any position, the entire length must be immersed in the controlled medium, which is widely used in electric power, chemical, metallurgy, environmental protection, water treatment, light industry, building materials and other industries. The field of automation systems.

Every technology of the electric head should meet the design requirements. When arriving at the inspection, we should focus on the following aspects:

The first is the valve body and trim specifications, including: valve type, valve type, nominal diameter, seat size, spool form, flow characteristics, leakage level, valve body material, spool material, seat material, CV value, flange standard grade size and sealing surface form, etc., as long as the same content and design inconsistency are found, the design should be determined and recognized.

Followed by the actuator part, should check the actuator type, type, mode of action, spring range, gas supply pressure and so on. In addition, check the positioner part, mainly check the positioner input signal, air source pressure, electrical and air source interface size and explosion-proof level, and the explosion-proof level should not be lower than the design level requirement. ^ After that, the accessories are checked one by one, and the accessories are carefully cleaned according to the technical requirements of the motor head, such as filter pressure reducing valve, valve position switch, solenoid valve, hand wheel mechanism, and special tools.