Electro-Hydraulic Actuators Double Acting AC440V/380V/220V

1Technical parameters of F4-SCB series small hydraulic power unit

1)Brief introduction of the function

This product introduces advanced hydraulic control technology from Europe and America. It is a medium-sized hydraulic power unit developed to adapt to electro-hydraulic linkage control of valves. The pump, motor and hydraulic control components in the power unit are imported or joint venture quality products, the performance index reaches the international advanced level. The opening and closing of F4-SCB series double-acting power units are driven by oil pressure, and the output flow rate of the power unit is 2.15l /min and 4.3l /min, which can be used according to the requirement of actuator switching time. Intelligent valve opening can be adjusted according to 4 ~ 20mA control signal.

All the above-mentioned power units can be designed for explosion protection.

2)Protection level:IP67 is provided. In addition, special requirements can be designed separately.

3)Ambient temperature:-15ºC ~ +80ºC (under special environmentalr equirements, can be customized -40ºC ~ +80ºC).

4)Cable interface:sealing cover thread: M20*1.5

5)Working pressure:140Bar maximum, pressure 160Bar

6)Working fluid:32#hydraulic fluid or ISO VG15

7)Tank capacity: 800 ~ 2500cc

8)Electrical parameters

2 F4-SCB series hydraulic power unit structure

3  Working principle of F4-SCB series hydraulic power unit

   The control signal of valve switch comes from integrated circuit electric controlcabinet (DCS communication interface).

1)   Valve opening: the power unit F4-SCB gets the valve opening signal, and the motor starts to drive the hydraulic pump to provide power oil to the actuator "valve opening" oil port until the actuator is completely opened; At this point,the limit switch on the actuator sends a signal to cut off the motor power andsends a "valve open" signal back to the integrated control cabinet.

2)   valve closing: power unit F4-SCB signals to valve closing, motor starts to drive hydraulic pump to provide power oil to actuator "valve closing" oil port, until actuator is completely closed; At this time, the limit switch on the actuator sends a signal to cut off the motor power and sends a "valve close"signal to feed back to the integrated control cabinet.

3)    Intelligent valve control: in the working condition requiring valve opening degree adjustment, the actuator plus supporting stroke encoder and adjustment integrated module can adjust the actuator 0° ~ 90° stroke positioning under the control signal of 4 ~ 20mA, and the control precision is less than 2%.

4)   Three-break valve position: when "three-break" occurs in the operation process of the hydraulic unit (power cut, signal cut, pressure cut), the actuator will remainin place.

5)   Valve stuck alarm:When the actuator gets the open/close valve signal and the valve is stuck and can not be fully opened/closed, The electric power of the hydraulic unit is cutoff by the preset time relay in the electric control cabinet and at the same time issued the valve stuck alarm.

6)   Emergency on site   operation: The actuator is equipped with an emergency operation interface. In   the case of "three break", the valve actuator can open or close the valve through a portable emergency hand pump

4 Electrical working principle diagram

5 F4-SCB series electro-hydraulic actuatorsdimension, output torque and running time

1) F4-P-SCB series rack and pinion electro-hydraulic linkage

2) F4-Y-SCB series of fork - type electro-hydraulic linkage

Remark:

1.The power unitis S2 working system.

2.Before installation, the oil cylinder, oil pipe, joint and other hydraulic components must be clean and free from any impurities.

3.The viscosity of hydraulic oil should be 15~68cst and should be clean and free of impurities.N46 hydraulic oil is recommended.

4. This hydraulic power unit is suitable for horizontal or vertical installation.

5. Check whether the oil in the tank is sufficient immediately after starting up the operating system for the first time.
6. The hydraulic oil should be replaced after the first 100 hours of use of the system, and every 3,000 hours after that.