Comparison between servo cylinder and valve positioner

There is a mechanical feedback connecting rod between the positioner and the actuator such as valve body, flap door or cylinder rod, which directly drives the cylinder positioner or valve controller with precise design, complicated adjustment and poor resistance to external force impact. The cylinder positioner or valve positioner is often used in the harsh environment such as corrosion, high temperature, high humidity, mud, flammable and explosive. If it is used improperly, it is often damaged. Such as: pneumatic control valve in bad environment will always appear cylinder positioner maladjustment caused by trouble.

In addition, the electric control part of the servo cylinder is an intelligent control core. Although the control core is highly integrated, highly intelligent and very precise, it does not need mechanical connection with the actuator. It only needs one wire and two air pipes, so it can be far away from the site and installed in the safe area or even inside the power distribution cabinet. So the complicated control of mechanical connection feedback becomes the intelligent control of electronic cylinder positioner.

The servo cylinder gets rid of the complicated mechanical connection mechanism. For the field actuator, the servo cylinder has no cylinder positioner or valve positioner, only an electric feedback sensor poured in the cylinder. The sensor can work normally at high temperature of 120 ℃ and is poured inside the cylinder, which will not affect the installation size space of standard cylinder, and because of the high temperature pouring package, there is no need to worry about the harsh environment on site. It is only designed on the actuator or valve body in the form of conventional cylinder. It brings incomparable convenience to design and field use.