When selecting valve electric actuators, in addition to paying attention to the compatibility with components such as valves, the control mode of the valve electric actuator should also be considered. In terms of control mode, there are two common types of valve electric actuators: switch type valve electric actuators and regulating type valve electric actuators. The difference lies in the different functions of valve switch control.

　　Adjustable electric ball valve

One Adjustable valve electric actuator

Adjustable valve electric actuator, also known as closed-loop valve electric actuator, not only has the function of controlling valve opening and closing, but also can control the opening amount of the valve to achieve control of the medium flow rate. In terms of working form, regulating valve electric actuators are divided into electrically open valve electric actuators and electrically closed valve electric actuators.

The working control signals of electric actuators for electrically open valves and electric actuators for electrically closed valves are different. When selecting, the working form of the valve electric actuator should be determined, otherwise it will not be suitable for the control system and difficult to modify.

The regulating valve electric actuator is equipped with signal loss protection. When the actuator cannot receive signals due to line faults or other reasons, it will automatically control the valve to open and close in the predetermined state, usually the valve is fully open, fully closed, or kept in place.

　　Switch type electric ball valve

II Electric actuator for switch type valve:

The switch type valve electric actuator is also known as the open-loop control type valve electric actuator. This type of actuator only has two actions, opening and closing, when performing valve operations, which can only keep the valve in the fully open or fully closed state. The switch type valve electric actuator cannot control the amplitude of valve opening and closing, and therefore cannot control the flow rate of the medium. There are two types of construction methods for switch type valve electric actuators: split structure and integrated structure.

The switch type valve electric actuator with a split structure must be equipped with a control unit to complete the control operation, which is not conducive to the overall installation of the system, and has a high investment cost and failure rate, which is not conducive to diagnosis and maintenance.

The integrated valve electric actuator is a structure that combines the control unit and the electric actuator into one, without the need for a separate control unit to complete the operation of the valve. The integrated valve electric actuator supports remote control, and as long as the control information is output to the valve electric actuator, it can complete the operation task on its own.

Tags: switch type electric ball valve, regulating type electric ball valve, electric O-type ball valve, electric V-type ball valve, electric regulating ball valve, electric switch ball valve