ZT series electric actuator

NegotiableUpdate on 12/16

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The ZT series electric actuator opening indicator mechanism is equipped with a micro switch and a cam. When the electric device is running, the rotating cam periodically activates the micro switch, with a frequency of one or two actions per rotation of the output shaft. It can be used for flashing signals and other purposes.

Product Details

　　ZT series electric actuatorAlarm information description:

faultcode　　Fault information

FA　　　　Turning error

Fd　　　　Valve position not changing due to blockage or other reasons

Fb　　　　Proportional calibration error, Fb flashes 3 times

FE　　　　Motor temperature switch disconnected or torque common terminal open circuit

FC　　　　Close the distance

FL　　　　Limit switch, torque switch wiring reversed or open circuit

FO　　　　Drive past distance

FH　　　　Remote control opening

FP　　　　Power phase loss

FS　　　　DC4-20mA remote control signal loss

Opening indicator mechanism:

The input gear is driven by the gear of the counter, and after deceleration, the indicator disk rotates simultaneously with the opening and closing process of the valve to indicate the opening and closing amount of the valve. The potentiometer shaft and indicator disk rotate synchronously for remote transmission indication. Adjusting the gear by moving the number of rotations can change the number of rotations. The opening indicator mechanism is equipped with a micro switch and a cam. When the electric device is running, the rotating cam periodically activates the micro switch, with a frequency of one or two actions per rotation of the output shaft. It can be used for flashing signals and other purposes.

1. Protection level: IP55 (special order IP65. IP67)

2. Work schedule: Short 10 minutes (30 minutes for special orders).

The model specifications and main performance numbers of ZT series electric actuators are shown in Table 1

Composition of ZT series electric actuators:

The composition of an electric actuator consists of three main components: motor, reducer, and position transmitter:

1. Motor: A motor is a switch power supply that receives output from a servo amplifier or electric operator, converts electrical energy into mechanical energy, and drives the action of the actuator, including DC motors, single-phase motors, three-phase motors, variable frequency motors, etc.

2. Reducer: The reducer has manual components, output shaft, and mechanical limit block. A reducer is a device that converts the high speed and low torque of a motor into low speed and high torque output power to drive the valve mechanism. There are two brake pads on the machine base, which can limit the rotation angle of the output shaft within 90 ° to ensure that the adjustment mechanism and related connecting rods are not damaged.

3. Position transmitter (control electrical compartment): The position transmitter consists of components such as power transformer, differential transformer, printed circuit board, etc.

Requirements for ZT series electric actuators:

1. For actuators with output as transfer, there should be sufficient torque, and for actuators with output as linear displacement, there should be sufficient force to overcome the resistance of the load. Especially for high-temperature and high-pressure valves, the sealing packing pressure is relatively tight, and after a long period of closure, it often requires more force to open than normal. As for the operating speed, it may not be very high because flow regulation and control do not need to be too fast. In order to increase the output torque or force, the output shaft of the electric motor has a reducer. If the motor itself is low-speed, the reducer can be simpler.

2. The transmission system of the reducer or motor should have self-locking characteristics. When the motor is not rotating, the unbalanced force of the load (such as the self weight of the gate valve) should not cause changes in the angle or displacement. Therefore, turbine worm mechanisms or electromagnetic brakes are often used. With such measures, the valve position can be maintained at its pre power outage position in the event of an unexpected power outage.

3. When there is a power outage or regulator failure, manual operation should be possible on the actuator to take emergency measures. For this, there must be a clutch and handwheel.

4. When manually operating the actuator, in order to provide automatic tracking basis for the regulator (tracking is required for disturbance free switching), there should be a valve position tracking signal on the actuator. This is not only the need for position feedback of the actuator itself, but also the need for valve position indication.

5. In order to protect the valve and transmission mechanism from damage due to excessive operating force, there should be limit devices and force or torque limiting devices on the actuator.

Ordering Notice:

Please indicate the model according to the model representation method. If there are special requirements, they must be specified when ordering. If not specified, please provide according to our company's regulations.

The presence of explosive gases in the environment must be specified and must comply with the explosion-proof markings specified in this manual.