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Applications

Model 9‑19 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 9‑19 fan is fitted with a 12‑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 9‑19 fans. Dimensional performance for other sizes can be calculated from these data.

✅ Heavy-duty housing​ – Thick-gauge enclosure protects internal components from impact and deformation.

🔇 Silent operation​ – Acoustic engineering minimizes noise without sacrificing airflow performance.

🔧 Tool-free access panels​ – Quick-open doors allow instant inspection and cleaning of the impeller area.

🔌 Universal flange dimensions​ – Standard bolt patterns match most existing ductwork without adapters.

🌡️ Wide temperature tolerance​ – Maintains structural integrity from freezing conditions up to elevated heat levels.

💨 Consistent static pressure​ – Aerodynamic scroll design ensures steady discharge regardless of inlet fluctuations.

⚖️ Precision-balanced rotor​ – Factory-tested dynamic balance eliminates vibration and extends bearing life.

🔄 Reversible rotation option​ – Field-adjustable motor wiring enables clockwise or counterclockwise airflow direction.

🛠️ Replaceable wear parts​ – Bearings and seals are readily available standard components for easy replacement.

📦 Compact footprint​ – Space-saving design fits into tight mechanical rooms and confined installation areas.

🔒 Lockable disconnect switch​ – Integrated safety feature allows secure power isolation during maintenance.

🧰 Minimal spare parts requirement​ – Simple construction reduces inventory needs for replacement components.

🌡️ Reliable Performance​ – Handles dust, temp swings, & humidity in tough environments.