Specifications

Model No.	Speed(rpm)	Pressure(Pa)	Airflow(m³/h)	Power(kw)
6.8A	2900	10523~11439	675~2295	7.5~15
7.1D	2900	11016~12471	768~2919	5.5~18.5
8D	2930	14277~16163	1110~4219	11~37
8.5D	2950	17013~18496	1341~4560	15~45
9D	2950	18318~20736	1591~6049	22~75
8D	2950	16216~17096	2996~7133	30~55
9D	2970	20803~21931	4295~9039	45~90

Product Introduction

Applications

Model 9‑26 centrifugal fans are generally used for forced‑draft ventilation of forging furnaces. They are also widely applied for material conveying and delivering non‑corrosive, non‑self‑ignitable gas free of sticky substances.

The medium temperature shall generally not exceed 50℃ (max. 80℃). The dust and hard‑particle content in the medium shall be no more than 150 mg/m³.

Structural Form

This fan is of single‑inlet type, available in 13 sizes: No.4, 4.5, 5, 5.6, 6.3, 7.1, 8, 9, 10, 11.2, 12.5, 14, 16.

The fan can be manufactured in clockwise‑rotation (right‑hand) or counter‑clockwise‑rotation (left‑hand) configuration. Viewed from the motor side, clockwise impeller rotation stands for a right‑hand fan (marked "Right"), while counter‑clockwise rotation stands for a left‑hand fan (marked "Left").

The outlet orientation is defined by the casing outlet angle. Both left‑hand and right‑hand versions can be supplied at 6 outlet angles: 0°, 45°, 90°, 135°, 180°, 225°.

Two drive arrangements are available: Type‑A (for No.4‑6.3) and Type‑D (for No.7.1‑16).

Structural Features

Units No.4‑6.3 mainly consist of impeller, casing, inlet nozzle and support. Units No.7.1‑16 are composed of impeller, casing, inlet nozzle and drive assembly.

(1) Impeller

The 9‑26 fan is fitted with a 16‑blade, forward‑curved impeller. The maximum peripheral speed at the outer edge of the impeller hub shall not exceed 140 m/s.

The impeller is static‑ and dynamically‑balanced after fabrication to ensure smooth operation.

(2) Casing

The volute‑shaped casing is welded from ordinary carbon‑steel plates as an integrated assembly.

(3) Inlet Nozzle

The converged streamlined integral inlet nozzle is bolted to the front cover‑plate assembly.

(4) Drive Assembly

Consists of main shaft, bearing housing and coupling. The main shaft is made of high‑quality steel. The integral bearing housing uses ball bearings lubricated with grease.

Performance and Selection

Dimension‑less performance tables and curves are provided only for the No.10 size of 9‑26 fans. Dimensional performance for other sizes can be calculated from these data.

Advantages

✅ Robust High-Pressure Performance — Delivers consistent, powerful airflow under elevated static pressure, ensuring reliable operation in demanding industrial environments where standard fans fail.

🔧 Direct-Drive Design — Eliminates belts, pulleys, and alignment issues, reducing maintenance costs and downtime while increasing overall system efficiency.

🛡️ Heavy-Duty Durability — Constructed from carbon steel or stainless steel to resist corrosion, abrasion, and high temperatures — built to last in harsh conditions.

🌪️ Precision Aerodynamics — Engineered impeller blades optimize energy conversion, minimizing turbulence and maximizing volumetric efficiency for smooth, stable air delivery.

📏 Compact Footprint — Space-saving design ideal for retrofits and tight installations without sacrificing performance or airflow capacity.

⚙️ Flexible Configuration — Available in multiple sizes, motor options (IE2/IE3/IE4), and mounting configurations (base, wall, duct) to match specific system requirements.

🌍 Global Compliance — Meets or exceeds CE, ISO 9001, and ATEX standards (optional), ensuring safe, legal, and reliable operation across international markets.

💨 Low Noise Operation — Optimized casing and blade geometry reduce operational noise levels, making it suitable for urban factories, laboratories, and residential-adjacent zones.

🔄 Continuous Operation Ready — Designed for 24/7 non-stop service with thermal overload protection, vibration dampening, and sealed bearings for zero-lubrication maintenance cycles.

📈 Energy Efficiency — High static pressure capability at lower RPMs reduces power consumption compared to low-pressure alternatives, lowering long-term operational costs.

Applications

🏭 Industrial Exhaust & Fume Extraction — Removes contaminated air, welding fumes, chemical vapors, and heat from manufacturing floors, foundries, and processing plants where high static pressure is required to overcome long duct runs and multiple branch lines.
🔧 Centralized Dust Collection Networks — Powers baghouse and cartridge filter systems in woodworking shops, metal grinding facilities, cement plants, and grain handling terminals, providing sufficient suction pressure to capture fine particulate at source points.
🔥 Combustion Air Supply — Delivers forced draft air to industrial boilers, furnaces, incinerators, and thermal oxidizers, ensuring stable flame conditions and optimal fuel efficiency across varying load demands.
🌾 Pneumatic Conveying Systems — Transports powdered, granular, and pelletized materials through pipelines in food processing, plastics manufacturing, chemical blending, and cement distribution facilities, maintaining consistent conveying velocity and material-to-air ratio.
⛏️ Tunnel & Underground Mine Ventilation — Provides primary or booster airflow in road tunnels, railway tunnels, subway systems, and underground mining operations, diluting diesel exhaust, dust, and potentially explosive gases while maintaining safe oxygen levels.
💊 Cleanroom & Pharmaceutical Air Management — Handles recirculation and exhaust in ISO-classified cleanrooms, sterile filling areas, and pharmaceutical production suites where particle shedding from belt-driven fans cannot be tolerated and strict pressure differentials must be maintained.
🥫 Food & Beverage Processing Ventilation — Manages air movement in baking ovens, drying chambers, spray drying towers, and fermentation rooms where consistent airflow and pressure are critical for product quality, hygiene compliance, and energy efficiency.
🏗️ Cement Mill & Foundry Ventilation — Extracts hot gases and dust from raw mill circuits, clinker coolers, foundry shakeout decks, and sand reclamation systems, operating reliably in high-temperature, abrasive-laden environments with minimal maintenance intervention.
🏢 High-Static-Pressure HVAC Retrofits — Upgrades existing belt-driven fan systems in commercial office towers, hospitals, and educational institutions to direct-drive configurations, reducing energy consumption, lowering noise levels, and eliminating belt replacement downtime.
🚢 Marine & Offshore Engine Room Ventilation — Supplies combustion air to diesel generators and main engines while extracting heat and fuel vapors from engine rooms, pump rooms, and cargo holds on ships, oil platforms, and floating production vessels.
🧪 Laboratory & Research Facility Exhaust — Removes hazardous fumes, solvent vapors, and corrosive gases from chemical fume hoods, biological safety cabinets, and glove box enclosures, maintaining negative pressure containment and operator safety.
♻️ Wastewater Treatment Aeration — Provides high-pressure air for diffused aeration systems in activated sludge basins, sequencing batch reactors, and membrane bioreactors, supporting biological oxygen demand reduction and preventing anaerobic conditions.

9-26 High Pressure Centrifugal Fan

The 9-26 High Pressure Centrifugal Fan is designed for high-pressure forced ventilation in industries such as metallurgical furnaces, glass, electroplating, ceramics, batteries, and radio. It is also widely used for material conveying in processing industries like grain, feed, and mineral powder, as well as for supporting equipment such as carton machinery and tempered glass devices. The 9-19 series features a forward-curved blade design with a cantilevered impeller mounted directly on the motor shaft. Its compact structure consists of a spiral volute casing, a tapered inlet cone, and a high-strength steel plate welded base frame. The impeller undergoes strict dynamic balancing to ensure smooth operation at high rotational speeds, typically ranging from 1450 to 2900 RPM depending on the model size. This design enables the fan to generate static pressures up to 15,000 Pa while maintaining relatively stable flow characteristics, making it particularly suitable for pneumatic conveying systems and combustion air supply applications where consistent pressure output is critical.

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