8-09 & 9-12 Series High-Pressure Centrifugal Fans with High-Efficiency Forward-Curved Impeller and Durable Galvanized Steel Casing for Iron-Melting Furnaces

This series includes two professional high-pressure centrifugal fan models designed for industrial high-pressure air supply applications:

• 8-09 Series: Specially engineered for iron-melting furnaces, perfectly matching the blowing requirements of furnaces with melting rates of 1L/h, 2L/h, 3L/h, 5L/h and 7L/h
• 9-12 Series: Versatile high-pressure fans suitable for various melting furnaces, forging furnaces and general industrial high-pressure ventilation

Both series are designed to convey air and non-corrosive, non-self-igniting gases free of viscous substances. The medium temperature must not exceed 80°C, and the concentration of dust and hard fine particles in the gas should be no more than 150 mg/m³. All models feature single-inlet configuration with reliable direct drive options.

• High-Efficiency Forward-Curved Impeller: Blade profile designed based on advanced high-efficiency forward-curved fan theory. All impellers undergo strict static and dynamic balancing corrections. Ensures smooth, vibration-free operation with excellent pressure performance.
• Durable Galvanized Steel Casing: Integral snail-shaped casing welded from high-quality galvanized steel sheets. Provides superior corrosion resistance and structural strength. Precision manufacturing ensures excellent air tightness and minimal leakage.
• Optimized Convergent Streamlined Air Inlet: Integrated convergent streamlined structure for maximum airflow efficiency. Firmly fixed to the front cover plate with bolts for stable connection. Minimizes inlet resistance and improves overall fan efficiency.
• Reliable Transmission Assembly: Main shaft made of high-quality steel for long service life. Two lubrication options available: grease lubrication for 8-09 №7.1D and №8D models; oil lubrication for 8-09 №8.5D, №9D and all 9-12 series models. Integral bearing housing design for enhanced stability and easy maintenance.
• Complete Sealing & Base System: Equipped with professional sealing components to prevent air leakage. Robust base frame ensures stable installation and operation. Strictly controlled impeller inlet sealing clearance for optimal performance.

Note: All parameters are based on standard conditions (air temperature 20 °C, atmospheric pressure 101300 Pa, air density 1.2 kg/m³). Performance conversion is required for non-standard working conditions.

• Rotation Direction:
  • Clockwise (CW): Impeller rotates clockwise when viewed from the motor end
  • Counterclockwise (CCW): Impeller rotates counterclockwise when viewed from the motor end
• Air Outlet Angle: 0°, 90°, 180° (available for both rotation directions)
• Transmission Methods:
  • Type A: Direct drive (impeller directly mounted on motor shaft)
  • Type D: Coupling drive (rigid coupling connection for high transmission efficiency)

• Specialized air supply for cupolas and iron-melting furnaces of various capacities
• Blowing systems for melting furnaces in foundries and metalworking plants
• Forging furnace air supply in blacksmith shops and forging facilities
• General high-pressure ventilation for industrial processes

• High-pressure forced ventilation in metallurgical and chemical industries
• Pneumatic conveying of granular and powdery materials
• Air supply for industrial furnaces, kilns and combustion systems
• Dust collection systems requiring high pressure
• General industrial high-pressure air supply applications

• Thoroughly inspect all fan components for damage or defects
• Verify that all parts are complete and in good condition
• Repair or replace any damaged components before installation

• Ensure the main shaft horizontal level meets the standard of 0.20 mm per 1000 mm
• Strictly control the impeller inlet sealing clearance:
  • 8-09 №7.1 and №8: 1.0 ~ 1.5 mm
  • 8-09 №8.5, №9 and 9-12 №8, №9: 1.5 ~ 2.0 mm
• Ensure proper alignment between motor and fan shafts for coupling drive models

• Close inlet or outlet dampers before starting to ensure no-load startup
• Gradually open dampers after reaching normal operating speed
• Strictly monitor motor current to prevent overload
• After 20 minutes of operation, check bearing housing temperature:
  • Temperature rise must not exceed 40°C above ambient temperature
  • Surface temperature must not exceed 70°C
• Check for any abnormal noise or vibration during operation

• Type A Drive: 1* complete fan unit, 1* matching three-phase asynchronous motor, 1 set of anchor bolts, installation and operation manual
• Type D Drive: 1* complete fan unit, 1* matching three-phase asynchronous motor, 1 set of coupling components, 1 set of anchor bolts, installation and operation manual

When placing an order, please clearly specify the following information:

1. Fan series and model number (e.g., 8-09 №8D, 9-12 №7.1A)
2. Required rotational speed (r/min)
3. Required air flow rate (m³/h) and total pressure (Pa)
4. Air outlet angle and rotation direction
5. Motor model, rated power (kW), protection rating and installation method
6. Any special requirements for materials, coatings or accessories

Established in 1999, Hunan Xinhongyuan Hi-Tech Co., Ltd. illuminates the industrial landscape with its pioneering spirit and profound expertise in industrial blowers and centrifugal fan equipment. As a distinguished national high-tech enterprise, we masterfully navigate the entire spectrum of research and development, production, sales, and service. Our extensive product range spans axial fans, centrifugal fans, and silent fans, all supported by a seamless and integrated customer service system that fuses R&D, production, and sales into a harmonious whole.

Driven by an unwavering commitment to technological advancement, we embody the 'brand enterprise' philosophy. Our collaborative ventures with illustrious institutions, including Central South University, Zhejiang University, Huazhong University of Science and Technology, and Changsha University of Science and Technology, foster ongoing technical exchange and cooperation. Together, we are empowered to continually push the frontiers of fluid dynamics and engineering excellence.

Our steadfast dedication to groundbreaking independent research and development has led to the formation of a top-tier R&D team. By employing state-of-the-art technologies such as 3D modeling, CFD flow field simulation, FEA finite element analysis, and CAD computer-aided design, we consistently redefine the parameters of fan technology. By seamlessly integrating these cutting-edge methodologies with our vast practical expertise, we persistently innovate and elevate our product offerings, establishing new standards for performance and efficiency in the industry.

We have advanced technology, high-quality products, a complete after-sales service system, and rich industry experience. In terms of technology, we continue to innovate and continuously introduce products with better performance. In terms of product quality, we strictly control every link to ensure the reliability and stability of the products. In terms of after-sales service, we respond promptly and comprehensively protect the rights and interests of customers. Our rich project experience enables us to quickly and accurately meet the diverse needs of different customers, and has established a good reputation in the industry.

We offer fan-related products, as well as customized solutions on demand, and are always available for consulting services.

Our team members are professionals in the wind turbine application industry. The company was established for 30 years, focusing on product research and development, and has rich experience in manufacturing process and production management.

Please contact the service department.