The selection of actuator in the control valve can effectively improve the comprehensive performance of the control valve. The use of actuator can make the valve produce enough output force to promote and ensure the sealing and opening and closing of the valve. Here is a brief introduction to the selection of actuators in the control valve: select the corresponding actuator according to the requirements of the process environment. Pneumatic actuator shall be selected when there are explosion-proof requirements on site. In consideration of energy saving, electric actuator shall be selected as far as possible. If the adjustment accuracy is high, the hydraulic actuator can be selected.

The butterfly plate of the butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc shaped butterfly plate rotates around the axis with a rotation angle of 0&# 176~ 90＆#176； To 90&# 176; When the valve is fully open. The butterfly valve is simple in structure, small in size and light in weight, and only consists of a few parts. And it only needs to rotate 90&# 176; The valve can be quickly opened and closed, and the operation is simple. At the same time, the valve has good fluid control characteristics.