Background

In industrial combustion systems, the control of air volume through dampers is crucial for combustion efficiency, safety, and compliance with emission standards. A certain client needed to install a high-reliability control valve in a DN800 pipeline to regulate the air intake of the burner damper, ensuring a stable combustion process while meeting long-term operational requirements.GRAT electric control valve delivers precise flow adjustment, reliable signal feedback, and durable performance, making it ideal for this application.

Operating Conditions

Size: DN800
Power: AC220V
Control signal: On/off input,0-1kΩ feedback
Predict lifetime: 5 years
Running time: May,2012
Function: Proportional Airflow Control

Product Advantages & Features

• High Precision Control: Equipped with a highly sensitive electric actuator,with Backlash≤0.5%, Dead one≤0.5%, Feedback Error≤0.5%, the airflow adjustment error is kept within ±2%, preventing incomplete combustion or excessive air supply.
• Stable and Reliable Signal Feedback: The 0-1kΩ resistance feedback mechanism monitors the valve position in real-time, ensuring that the air-fuel ratio remains within the optimal range, thus maintaining the combustion system in its best operating condition at all times.
• Long Lifespan Design: The mechanical structure is optimized and made with wear-resistant, high-temperature materials to ensure stable performance during long-term operation, far exceeding the 5-year design lifespan.
• Wide Voltage Adaptability: Supports AC220V power supply, accommodating common voltage fluctuations in industrial environments to ensure stable operation.
• Easy Maintenance: Modular design allows for easy replacement of key components; only regular lubrication and inspections are needed, reducing maintenance costs by 50%.

Performance Results

• The electric butterfly valve completes the airflow switch in 10 seconds, eliminating the risk of dioxin generation due to adjustment delays.
• After switching to the butterfly valve, fluid resistance decreases and the motor current of the fan drops by 11A, resulting in annual electricity savings of 220,000 kWh.
• The dust-free structure of the valve plate extends the maintenance interval to 6 months, reducing downtime by 120 hours annually.

Since its operation commenced in May 2012, the valve has continued to function steadily, fully meeting the client’s stringent requirements for air volume control, far exceeding the expected five-year lifespan, and demonstrating exceptional durability. With its high reliability, precise control and long life, we have won the trust of customers by performing well in burner vent door air volume control. This case fully proves the excellent performance of GRAT products in the field of industrial automation control, providing efficient and stable valve solutions for global customers.