Mixed-flow High-temperature Exhaust Fan

In the high-temperature exhaust systems of industrial kilns, the hot air extraction of drying equipment, and the high-temperature gas discharge of chemical processes, operating conditions often require both certain pressure to overcome duct and equipment resistance and relatively large airflow to ensure timely discharge of high-temperature gas. Pure axial high-temperature fans lack sufficient pressure; pure centrifugal high-temperature fans are too bulky and have high noise. Our factory's Mixed-flow high-temperature exhaust fan combines the high airflow of axial fans with the moderate pressure of centrifugal fans, optimized for medium-high temperature exhaust scenarios requiring both airflow and pressure - the ideal choice for such "dual-requirement" conditions.

The Mixed-flow high-temperature exhaust fan adopts mixed-flow impellers with complex three-dimensional blade shapes, mostly precision-cast or welded from heat-resistant stainless steel to ensure profile accuracy and strength at high temperatures. Within the impeller, gas moves along the mixed-flow direction (between axial and radial), receiving both axial thrust and centrifugal pressurization, delivering higher pressure than axial fans while maintaining high airflow and low noise. The casing design guides gas smoothly transitioning from axial inlet to oblique outlet, with smooth internal flow passages and insulation layers to reduce heat loss and casing surface temperature. The bearing system adopts air or water cooled structure to ensure bearing temperature remains within safe range at high temperatures. The outlet angle can be customized (45°, 60°, or other) to match duct layout. Our factory's R&D team performs dedicated mixed-flow impeller aerodynamic design and thermodynamic calculations based on customer exhaust temperature, airflow, and system resistance, ensuring every Mixed-flow high-temperature exhaust fan operates at optimal efficiency at the customer's actual operating point. In the high-temperature exhaust system of a large ceramic tunnel kiln, a Mixed-flow high-temperature exhaust fan is installed at the kiln tail, extracting 350°C high-temperature flue gas and sending it to the dryer for waste heat utilization. Its mixed-flow structure provides sufficient pressure to overcome the resistance of the dryer and ducts while delivering large airflow to ensure stable kiln pressure; its heat-resistant stainless steel impeller and water-cooled bearing housing ensure stable continuous operation - this is the practical value of Mixed-flow high-temperature exhaust fans in medium-high temperature dual-requirement exhaust scenarios.

• High-temperature flue gas extraction in ceramic tunnel kilns and roller kilns
• Hot air extraction and waste heat utilization in drying equipment
• High-temperature process gas exhaust in chemical and petrochemical plants
• High-temperature exhaust in glass melting furnaces and annealing furnaces
• Hot air extraction in food and feed drying equipment
• High-temperature gas exhaust in waste heat recovery systems

Mixed-flow high-temperature exhaust fans can be customized based on customer exhaust parameters. Based on temperature, airflow, and pressure, perform mixed-flow impeller aerodynamic design, with impeller material selectable as precision-cast or welded heat-resistant stainless steel. Outlet angle customizable (45°, 60°, or other) to match duct layout. Bearing cooling method selectable as air or water cooled. Casing insulation layers available. Variable-frequency speed control systems can be configured to automatically adjust airflow based on process temperature. Inlet/outlet flange dimensions machined to customer ducts. MOQ is one unit; customization lead time is 10–15 working days.

The quality focus of mixed-flow high-temperature exhaust fans is on impeller precision and hot-state performance. Heat-resistant stainless steel materials are verified against material certificates upon warehousing, with spectral analysis verification. Precision-cast impellers undergo dimensional inspection and surface flaw detection; welded impellers undergo weld penetrant testing. After welding or casting, impellers undergo stress-relief treatment, then dynamic balancing with accuracy no lower than Grade G6.3. Bearing housings undergo cooling system sealing testing. After assembly, no-load running of no less than 2 hours monitors bearing temperature rise, vibration, and noise. Every product undergoes 100% inspection, accompanied by material certificates and inspection records.

Standard products: 30% deposit, 70% before shipment. Custom material or special configuration products: 50% deposit, 50% before shipment. All payments go through corporate accounts. We accept settlement in multiple currencies including USD, EUR, and GBP, with exchange rates based on the Bank of China central parity rate on the payment date. Long-term cooperative customers may negotiate flexible terms. Bulk orders enjoy tiered discounts. All terms are stipulated in a formal contract, effective upon signing and stamping by both parties.

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