MK22 Electric Actuator
KUHNWAY ELECTRIC ACTUATOR
Description
MK22 is an electric actuator with 90-degree rotation function, suitable for the automation control needs of various small and medium-sized valves. The built-in over-torque protection device can automatically stop the action when the valve body encounters obstruction during operation, effectively preventing equipment damage caused by overload and improving system safety and reliability.
The actuator can be equipped with a proportional controller to achieve precise adjustment of the valve opening to meet applications with high requirements for fluid control accuracy. MK22 supports both on-site manual operation and remote control systems, with high flexibility and easy integration into various automation platforms. It has a wide range of applications, including water treatment, building automation, HVAC systems and process control.
Specifications
1. Maximum torque : 225NM
2. Gear rario : 2360
3. Time for 90 ° : 22 sec
4. Motor power : 150 W
5. Manual gear ratio : 65
6. Weight : 10 kg
7. Control method :
• Basic type ON/OFF
• Modulating
8. Voltage :
• 110/220V single phase
• 220/380/440V three phase
Standard Components
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Watertight IP 65. (Optional : IP 66, IP 67, IP 68)
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Over torque protection switch.
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Mechanical position indicator, allows users to visually check the actuator's opening status.
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Hand wheel.
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Two limit switches.
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The motor is equipped with an internal thermal protection device.
Special notes for installation of electric actuators
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When mounting electric actuators with valves it is necessary of valves's shaft and mounting brackets, socket. vertical and same center to match the actuator's vertical and same center.
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After completing the final setting for adjusting travel stops ,be sure to seal the two adjusting travel stops by water proof glue.
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After completing wiring installation, be sure to seal the wiring connection hole by water proof glue after completing wiring installation.
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Do not use electric actuators in the vacuum's chamber.
Optional Features Description
Modulating Control Unit (MCU)
Actuator can be operated according to input signal and provide the output signal for indicator.
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Three input options : 4~20 mA、 1~5 VDC、 2~10 VDC
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Output : 4~20 mA
Local Control Unit (LCU)
Local control unit is waterproof including four buttons with LED indicators. When the main control switches to on-site control mode, the controller allows the actuator to be opened and closed via the control panel. Similarly, the main control mode can switch back to remote operation mode, enabling the actuator to be controlled via a remote controller.
The on-site controller is designed to effectively prevent misoperation or accidents, ensuring safe and reliable operation.
Bracket and Socket
The MK series electric actuators use UNC thread standard mounting holes. If the valve body follows the ISO5211 standard, ISO5211-compatible brackets and sockets are required. These components ensure efficient compatibility, stable connections, and improved system reliability and efficiency.
Other Components
A. Potentiometer (1kΩ)
Provides feedback signal to indicate the opening status
B. Auxiliary Microswitches (Dry Contact)
The standard model equips with the 1st & 2nd switches for fully-open and fully-closed. The option consists of the 3rd & 4th auxiliary switches which provide dry contacts for fully-open and fully-closed.
C. Heater
A space heater can increase the internal temperature and keep dry inside actuator to avoid the freezing lubricant and moisture causing actuator failure under low temperature or high humidity.
MK22 is a 90° rotary electric actuator featuring built-in torque protection, optional modulating control, and flexible integration with local and remote systems.