Why Choose the SENOTAY 4-72 Industrial Blower
The 4-72 Industrial Blower is a standardized centrifugal fan series built for high-volume, low to medium static pressure ventilation, using backward-curved impeller blades to move large air volumes with less turbulence and energy loss than a straight-blade design. Airflow spans 800 to over 56,000 cubic meters per hour across ten model sizes, with direct, belt, and coupling drive types letting a facility choose configuration based on available installation space rather than being locked into one drive method. Factories and HVAC systems use the 4-72 series for general ventilation and dust extraction where gas stays below 150 milligrams per cubic meter of dust and under 80 degrees Celsius, while facilities running hotter processes rely on the optional cooling wheel to extend continuous operation up to 200 degrees. Hebei OuTai Environmental Protection Equipment Co Ltd manufactures the 4-72 Series in Hebei, China, with drive type, discharge angle, and impeller material matched to the airflow, pressure, and gas condition of each installation.
Technical Performance Matrix
| Component Feature | Standard Ventilation Fans | SENOTAY Structural Advantage |
| Airflow Efficiency | High turbulence causing energy losses | Aerodynamic backward-curved impellers optimize fluid dynamics |
| Structural Rigidity | Casing vibration and premature warping | Heavy-duty reinforced carbon steel housings resist stress |
| Operational Noise | Intense acoustic decibel spikes at speed | Precision G2.5 dynamic balancing ensures smooth, quiet run |
Why Leading Plants Choose SENOTAY Y5-47 industrial blower
Factory-Direct Pricing. Certified Quality. Dedicated Support.
Best Price Guarantee
Certified & Compliant
Fast, Reliable Delivery
Comprehensive After-Sales Support
Lifetime Technical Support: Direct engineering access for system static pressure calculations, ducting layout adjustments, motor power matching, and air-to-cloth ratio tuning.
Full System/Parts Availability: On-demand factory access to all vital replacement components, including spare impellers, heavy-duty belts, water-cooled bearing blocks, and vibration-isolation springs.
Remote Troubleshooting: Immediate technical assistance for field diagnostics, including vibration tracking, airflow capacity drops, or thermal expansion alignment issues.
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Product Description & Material Properties
The 4-72 industrial air blower is composed of a high-strength steel body and dynamically balanced impeller and smooth airflow channels. It operates effectively under ambient temperatures up to 80°C and with optional cooling wheels where it can handle gases up to 200°C continuously.
Typical Material Composition:
Component | Material | Key Properties |
Casing | Carbon Steel / Stainless Steel | High tensile strength, oxidation resistance |
Impeller | Q235 / Stainless Steel | Strong rigidity, low vibration during operation |
Shaft | Alloy Steel | High fatigue strength and stability |
Bearings | Imported SKF / NSK | Low noise, long lifespan |
Coating | Anti-corrosive Spray | Enhanced surface protection against oxidation |
Standard Mechanical Properties:
4-72 Blower Model Specifications & Technical Comparison
Model | Speed (r/min) | Air Flow (m³/h) | Pressure (Pa) | Power (kW) | Drive Type | Efficiency (%) |
4-72-2.5A | 2900 | 805–1677 | 792–483 | 0.75–2.0 | Direct | 70% |
4-72-3.2A | 2900 | 1688–3517 | 1300–792 | 2.2 | Direct | 73% |
4-72-4A | 2900 | 4012–7419 | 2014–1320 | 5.5 | Direct | 75% |
4-72-4.5A | 2900 | 5712–10562 | 2554–1673 | 7.5 | Belt | 76% |
4-72-5A | 2900 | 7728–15445 | 3187–2019 | 15 | Belt | 78% |
4-72-6A | 1450 | 6677–13353 | 1139–724 | 4 | Belt | 80% |
4-72-6.3A | 1450 | 7729–15458 | 1256–798 | 7.5 | Coupling | 82% |
4-72-7.1A | 1450 | 12676–20513 | 1572–1168 | 11 | Coupling | 84% |
4-72-8D | 1450 | 15826–29344 | 2032–1490 | 18.5 | Coupling | 85% |
4-72-10D | 1450 | 40441–56605 | 3202–2532 | 55 | Coupling | 86% |
4-72 Industrial Blower — Technical Specification Table
Physical Dimensions | Performance Ratings | Material & Construction | Operational Data | Certifications & Lifecycle |
Length: 980–1650 mm | Airflow Capacity: 1,200–48,000 m³/h | Q235 Steel | 180–260 Nm | 28,000–36,000 hrs |
Width: 740–1280 mm | Static Pressure: 380–1,850 Pa | Q345 Steel | 8 × Ø16 mm | 24–36 months |
Height: 860–1420 mm | Operating Pressure: 0.8–1.4 Bar | 45# Steel | 230–980 kg | ISO 9001 / CE |
Inlet Diameter: Φ250–Φ560 mm | Max Pressure: 1.6 Bar | Self-aligning Roller | 1.5–30 kW | > 12,000 cycles |
Outlet Flange: 220 × 320 mm | Operating Temp: -20 to 80°C | Nitrile Rubber (NBR) | 960–2900 rpm | > 90,000 cycles |
BCD: 350–450 mm | Max Temp: 120°C | 80–130 μm | ≤ 6.3 mm/s | 12–18 months |
Base Plate Thickness: 8–12 mm | Efficiency: ≥ 82% | GB/T 12467 Level 2 | 2 × Rated 1 Ton | Industrial Grade I |
4-72 Industrial Blower Working process
The working mechanism of the 4-72 centrifugal blower is based on centrifugal force. When the impeller rotates, air enters axially through the inlet and is pushed outward by the rotating blades. The motion converts mechanical energy from the motor into kinetic and pressure energy in the airflow. The volute then collects, directs, and discharges this energy as a uniform air stream.
Process Overview:
Air Inlet – First Air enters the impeller center.
Centrifugal Acceleration – Then The impeller imparts velocity and pressure to the air.
Air Discharge – And at end The volute transforms kinetic energy into pressure and disperses it through the outlet.
Features of the 4-72 Industrial Blower
Excellent Ventilation: For ventilation it is Optimized aerodynamic design ensures powerful air throughput.
Wide Applicability: Its really Suitable for non-corrosive, non-flammable air handling.
Low Noise Design: Dynamic balancing eliminates mechanical friction and noise.
Stable Operation: Minimal axial vibration and balanced motion.
Ease of Maintenance: Backward-curved impeller minimizes dust buildup.
Long Service Life: Rigid steel construction with protective coatings ensures durability.
Core Components
Component | Function |
Impeller | Provides kinetic energy to the air |
Volute Casing | Converts velocity into static pressure |
Shaft & Bearing System | Supports smooth rotation |
Motor | Drives the impeller |
Inlet Bell | Ensures laminar airflow |
Mounting Frame | Provides structural base |
Cleaning Door | Enables convenient maintenance |
Technical Advantages in Manufacturing at Senotay
As a leading industrial fan supplier in China, Senotay (Hebei OuTai Environmental Protection Equipment Co., Ltd.) integrates:
ISO 9001:2015 Certified Processes.
CE Machinery Safety Approved Designs.
Advanced Laser Cutting & CNC Balancing.
Imported Bearing and Motor Components.
Comprehensive In-House Testing Systems.
Every blower undergoes dynamic balancing verification, ensuring optimal stability and energy efficiency before shipment.
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FAQs: 4-72 Industrial Blower
1. What is the airflow range of a 4-72 centrifugal fan?
Answers:Depending on the model, airflow ranges from 800 to over 56,000 m³/h.
2. What type of gases can it handle?
Answers:Only non-corrosive and non-flammable gases with dust levels below 150 mg/m³.
3. Can the blower be customized?
Answers:Yes. Senotay offers custom impeller sizes, materials (stainless steel, carbon steel), and mounting types for different industrial environments.
4. Is it suitable for high-temperature processes?
Answers:Yes, with a cooling wheel, it can operate up to 200°C continuously.
5. Do you offer after-sales support?
Answers:Absolutely. We provide installation guidance, technical support, and spare parts for long-term maintenance.
