Bi-directional floating proportional control; High precision and sensitivity of temperature control; Various AC voltages for selection, such as 24V, 110V and 220V,etc; Timing protection device (for 24V working power supply, it can be assembled for optional), to ensure motor reliable and durable life; Built-in electronic card (24V working power supply) can receive 0∼10V (for model MV03...B) or 4∼20mA (for model MV03...EC) DC input control signal, and provide proportional control; The valve actuator and valve body is used tight lock connection. The actuator can be installed after the installation of valve body. It has flexible and convenient assembly.