Product Details
Product Overview:
This stainless steel centrifugal fan is a corrosion‑resistant centrifugal ventilation unit. The entire housing is fabricated from stainless steel sheet, and it generates airflow pressure through the high‑speed rotation of a centrifugal impeller, enabling gas conveyance, exhaust, and air exchange. Unlike conventional carbon‑steel fans, it offers superior resistance to corrosion, acids and alkalis, rust, and high temperatures, making it suitable for handling corrosive exhaust gases, high‑temperature steam, and clean air. It can be equipped with either explosion‑proof or standard national‑standard motors, features adjustable airflow and static pressure, operates smoothly with minimal vibration, and is widely used in environmental protection exhaust systems, chemical processing, food production, coating operations, and other applications requiring corrosion resistance—such as ventilation and dust removal, exhaust gas extraction, and material conveying.
Core Advantages of the Products:
Corrosion and Rust Prevention: The entire unit is constructed from 304/316 stainless steel, offering resistance to acids, alkalis, salt spray, and moisture corrosion; it is highly resistant to rust and damage even in humid, corrosive gas environments.
Clean and hygienic: The stainless steel inner wall is smooth, resistant to fouling, and free of rust‑induced debris shedding, thereby meeting the stringent cleanliness and ventilation requirements of the food and pharmaceutical industries.
Wide range of operating condition adaptation: Adaptable to high- and low-temperature media ranging from 20°C to 280°C, it can convey corrosive fumes, water vapor, and trace amounts of corrosive dust-laden gases.
Easy maintenance: The housing is equipped with a dedicated cleaning and inspection port (as indicated by the body marking), allowing for quick access to remove accumulated dust and grease from the impeller, thereby extending the equipment’s service life.
Flexible selection: Two structural options are available: split‑belt drive and direct‑drive; variable‑frequency speed control is compatible with variable‑air‑volume applications.
Common Model Parameter Table for 4-72 Centrifugal Fans in Stainless Steel (304 stainless steel housing, available with direct-drive Type A or belt-driven Type C)
Note: The entire unit—volute, impeller, and air inlet—is constructed from 304 stainless steel; a 316L corrosion‑resistant upgrade is available. Standard configuration includes a 380 V three‑phase motor; explosion‑proof or variable‑frequency drives can be customized.
I. Type A Direct-Drive Transmission (motor directly connected to the impeller, #2.8–#4)
| Fan model | Impeller diameter (mm) | Rotational speed (r/min) | Matching motor power (kW) | Airflow (m³/h) | Total pressure (Pa) |
|---|---|---|---|---|---|
| 4-72-2.8A | 280 | 2900 | 0.55/1.1 | 1130–2350 | 260–560 |
| 4-72-3.2A | 320 | 2900 | 1.1/2.2 | 1950–3820 | 310–690 |
| 4-72-3.6A | 360 | 2900 | 2.2/3 | 2930–5780 | 370–790 |
| 4-72-4A | 400 | 2900 | 3/4 | 4040–7950 | 430–920 |
II. Type C Belt Drive (Belt Pulley Drive, #5–#10, with variable speed to adjust airflow and air pressure)
| Fan model | Impeller diameter (mm) | Common rotational speed (r/min) | Rated power (kW) | Airflow (m³/h) | Total pressure (Pa) |
|---|---|---|---|---|---|
| 4-72-5C | 500 | 1800 | 3–7.5 | 6450–13200 | 540–1210 |
| 4-72-6C | 600 | 1450 | 5.5–11 | 10,800–21,600 | 660–1480 |
| 4-72-8C | 800 | 1250 | 15–30 | 21,800–44,500 | 790–1780 |
| 4-72-10C | 1000 | 960 | 30–55 | 38,500–76,800 | 720–1620 |
III. Material Selection Parameters
| Material Type | Applicable operating conditions | Applicable medium |
|---|---|---|
| 304 stainless steel | General-purpose resistance to corrosion, cooking fumes, moisture, and weak acidic exhaust gases. | Food, catering, coating, general chemical industry, and coastal areas with mild salt spray. |
| 316L/316 stainless steel | Strong acids and strong bases, electroplating pickling, high-salt-spray chemical processing | Pickling workshop, electroplating plant, highly corrosive exhaust gases from pharmaceutical production, coastal chemical plant |
| Shell: carbon steel + Impeller: 304 stainless steel | Internal overcorrosion gases, external dry environment | Economical exhaust ventilation, controlling procurement costs. |
IV. Additional Optional Parameters
Motor selection: standard all-copper motor compliant with national standards / EX explosion-proof motor (for flammable and explosive environments) / variable-frequency drive motor (with adjustable airflow);
Temperature resistance: For standard 304 stainless steel, ≤200°C; the high-temperature-resistant stainless steel version can handle up to 280°C for conveying high-temperature gases.
Structural options: with an access panel (as shown in the product), equipped with a vibration-damping base, flexible inlet and outlet connections, and an insect-proof mesh.
Applicable use cases:
1. Food and Pharmaceutical Industry
The steaming and cooking workshop of a food processing plant vents high‑temperature steam, while the pastry factory exhausts cooking fumes. In pharmaceutical manufacturing, cleanroom ventilation and organic waste gas extraction are employed; stainless steel ensures no rust or contamination of raw materials, fully complying with hygiene standards.
2. Chemical Corrosion-Resistant Operating Conditions
Electroplating plants, pickling workshops, and agrochemical factories extract corrosive acidic and alkaline exhaust gases; laboratory exhaust gas treatment and fume extraction from the tail gases of small-scale chemical reaction vessels.
3. Exhaust gases from environmentally friendly coatings
Exhaust ventilation for paint booths and odor extraction in ink‑printing workshops, used in conjunction with exhaust‑gas purification equipment; resistant to corrosion by paint solvents.
4. Kitchen, Bathroom, and Foodservice Industries
Exhaust ventilation for fumes from large-scale central kitchens and the conveyance of moist, hot exhaust gases from cooked-food processing workshops—resistant to high-temperature oil fumes and water vapor.
5. Special Environmental Scenarios
Coastal seafood processing plants (corrosion‑resistant in salt‑spray environments), high‑temperature, humid‑air exhaust from hot‑spring bathing centers; transportation of moist, hot, corrosive gases in papermaking and textile‑printing/dyeing workshops.
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