Oven and Furnace Circulation Fan

The facilities like heat treatment furnaces, industrial drying ovens, automotive paint curing lines and aerospace processing need to ensure qualities. The quality of those processed materials highly depends on the uniformity of temperature inside the chamber. In these facilities, we often need to deal with an important thing that is Without fans to recirculate the air, the heat will stratify. So, the top part of the chamber is hotter than the bottom part and the area near the heating element is hotter than the center of the load. Furnaces with poor internal air circulation often need to face inconsistent microstructure and mechanical properties across the entire batch during metal component processing. In aerospace heat treatment governed by AMS 2750, temperature uniformity of ±5°C to ±14°C across the work zone is a certification requirement. In automotive paint curing, temperature variation across body panel surfaces causes blistering, uneven cross-linking and coating adhesion failures.

The impeller of this fan works inside but the motor is mounted outside of the furnace. This design is what makes the Oven and Furnace Circulation Fan so effective. The impeller rotates continuously and makes sure to spread hot air evenly to every corner of the chamber, that is called forced convection. Depending on the size of the furnace and the speed of air circulation, this breaks down thermal stratification and keeps the temperature difference within the chamber to only ~±3°C to ~±14°C. It offers three mountain options for easy installation.

Top-mounted: Mounted on top of the furnace roof. Widely used in pit and box-type heat processing furnaces and provides the best temperature uniformity.

Side-mounted: Mounted on the side of the wall. Suitable for car-bottom and pusher furnaces.

Rear-mounted: Mounted from the rear. Convection is used to distribute air evenly throughout the entire depth of the oven.

Oven and Furnace Circulation Fan can tolerate from 80°C to 600°C. which are very suitable for industrial drying and curing applications to high-temperature annealing and heat treatment furnaces. It provides 1,500 to 300,000 m³/h airflow and 500 Pa to 8,000 Pa pressure for internal recirculation. The standard fan of this unit offers backward-curved and radial impellers based on the facility's environment. A standard impeller is made of heat-resistant alloy steel, SS310, SS321 or Inconel are also used depending on the application temperature. The type of blade is selected according to the furnace's condition. Such as paddle wheel / radial flat blades are used in environments with scale or dirt and backward curved blades are used in clean protective gas environments such as nitrogen, endothermic gas or argon. It has a strong motor power of up to 1,000 kW. So, it can cover everything from small batch curing ovens to large continuous industrial furnaces. To control the air circulation speed at each stage of the furnace's heating and soaking cycle, we offer a Variable Frequency Drive (VFD). Design and customization are also available based on the stringent AMS 2750 pyrometry standards for aerospace heat processing and the automotive industry's CQI-9 heat processing standards.