The KD25 damper actuator is an actuator that controls the opening and closing of an air damper driven by a wax motor, instead of electric motor, hydraulic fluid or pneumatic pressure. It's a compact, reliable and cost-effective solution for controlling airflow direction in HVAC systems where rapid response aren't critical. Its typical application is in ventilators, where it controls the opening and closing of air dampers to provide a bypass function.
At the heart of our KD25 damper actuator is a thermoactuator that utilizes the expansion of wax to generate linear motion. Check this blog post to learn more about the thermoactuator if you're new to it. When it's powered on, the thermoactuator plunger gradually extends out. Then through the mechanical transmission of gears and racks, the thermoactuator's linear motion is converted into a 90-degree rotational motion, which drives the opening and closing of the air damper to regulate airflow direction.
Rotation Angle: 0°-90°
Operating Voltage: 110/240V, 24V
Automatic Reset upon Power Loss
Steady-state Power Consumption: 3.5W
Opening Time: 30-60 seconds
Service Life: ≥15,000 cycles
Protection Class: IP00
Operating Temperature Range: -10°C ~ +90°C
1. Simple Structure and Low Cost:
Wax motors have a straightforward design with no complex electronic components. They operate based on the thermal expansion and contraction of wax, making it a compact and cost-effective solution.
2. High Stability and Long Lifespan:
Without moving parts like motors or complex gear reduction systems, wax motors experience minimal mechanical wear. This ensures high reliability and typically extends their operational lifespan.
3. Noise-Free Operation:
Wax motors produce no noticeable noise during operation. Their movements are driven by the gradual thermal expansion process, free of rapidly moving components, making them ideal for equipment where quiet operation is critical.
4. Resistant to Electromagnetic Interference:
Unlike solenoid valves, wax motors do not rely on electromagnetic mechanisms, eliminating the risk of electromagnetic interference. This makes them suitable for environments where electromagnetic radiation must be avoided.
5. High Safety:
The heating and expansion process in wax motors is gradual, resulting in smooth and gentle operation. This minimizes the risk of sudden actions or malfunctions commonly associated with strong electromagnetic actuators, enhancing overall safety.