The main drive is made up of the spur gear pair and worm gear pair and the motor can be dismantled independently.

Hand/Auto switch: The shift from manual to motor operation is semiautomatic of electric priority for 9032 base and under. For products with larger output torque, easy changeover is possible by adoption of the low force sliding gears.

The counter used in the limit switch ensures reliable running without interference.

The large capacity self-cleaning limit switches can automatically clean the contact surface to improve the contact reliability.

Modular design: Mounting the control package on the basis of the basic type can make 903 series be mechatronics products.

Stem mantle: The steel mantle to prevent the rising valve stem from accidental damaging。

Additional limit switches: Add a set of limit switches for the intermediate position control both in open and close direction.

Two-wire system valve position transmitter VPT2: Input 24VDC signal by two wire and feedback 4~20mA signal at the same time(percentage).

Four-wire system valve position transmitter VPT4：Input 220VAC signal by two wire, feedback 4~20mA signal by other two wire(percentage).

Phase protector JDX: It is used for integrated type with three-phase ac power supply. The phase protector real-time monitor the three phase power, which can prevent the valve running to the wrong direction and running short of phase due to phase sequence error.