4-79 Type Centrifugal Fan For Indoor Ventilation In General Factories

The 4-79 centrifugal fan is designed for indoor ventilation in factories and large buildings. It efficiently handles air and non-corrosive gases, with low noise and high efficiency. The fan is available in both clockwise and counterclockwise rotations, with adjustable outlet positions for flexible installation. Suitable for air volumes containing minimal dust and hard particles, this fan ensures reliable performance up to 80°C. Ideal for general industrial applications.

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Durability: Vinylester resin, UV protection, extended service life.
Customizable: Computer strain analysis, G2.5 balance, low vibration risk.
Easy Maintenance: Oil bath bearings, heat/corrosion resistant, cost-effective.
Professional Team: Expert wind turbine guidance.
High aerodynamic efficiency, low noise, corrosion resistance.
Medium temp range: -20℃ to 80℃, ≤ humidity, ≤ 100mg/m3 dust content.
Durable Fiberglass Build: Ensures long-lasting performance.
Ethylene-based fiberglass blades optimize airflow.

4-79 Type Centrifugal Fan For Indoor Ventilation In General Factories

Application

The F4-72 fan, made of stainless steel, is used to convey corrosive gases, maintaining the same performance and foundation dimensions as the 4-72 model.The 4-79 centrifugal fan is ideal for indoor ventilation in general factories and large buildings. It effectively handles air and non-corrosive gases, ensuring safety and efficiency. The gas transported must be non-self-igniting, non-toxic, and free from sticky substances, with dust and hard particles not exceeding 150mg/m³, and temperatures not surpassing 80°C.

Type

Available in clockwise and counterclockwise rotations, the fan's direction is determined by the impeller rotation when viewed from the motor end. The right-hand fan rotates clockwise, while the left-hand fan rotates counterclockwise. The outlet position of the fan is indicated by the outlet angle of the casing. Fans from No. 3 to No. 12 are manufactured in a single type for user convenience, allowing installation at the required position without specifying during ordering. No. 3 outlet position adjustment range is 0°225°, at intervals of 45°. The adjustment range for No. 3.5No. 6 is 0°225° at intervals of 22.59°, with A-type transmission. No. 7No. 8 outlet position adjustment range is 0°180°, at intervals of 22.59°, with C-type transmission. Fans No. 10No. 20 have an E-type transmission mode, with fixed outlet positions of 0°, 90°, and 180° that must be specified when ordering. Double air inlet forms for No. 10~No. 20 also have fixed positions and E-type transmission.

Overall Structure

Fans No. 3No. 6 in the 4-79 series include impellers, casings, and air inlets, directly connected to the motor. Fans No. 7No. 20 include these parts plus transmission components.

Impeller: Features 16 backward-inclined arc thin-plate blades, a curved front disc, and a flat rear disc made of steel plates. Balanced for optimal air performance, high efficiency, low noise, and smooth operation.
Casing: No. 3No. 12 casings are made as a single piece and cannot be disassembled. Casings for No. 14No. 20 are in two parts, joined by bolts along the horizontal plane.
Air Inlet: An integral part installed on the fan's side, with a curved axial cross-section to facilitate smooth gas entry with minimal loss.
Transmission Part: Comprising the main shaft, bearing box, rolling bearing, and pulley.

Performance and selection

Fan Performance: Parameters such as air volume, total pressure, shaft speed, power, and efficiency define the fan's performance, with interdependent relationships between them.

Fan Selection: The performance parameters listed reflect standard air condition performance. For non-standard conditions, convert performance to standard conditions using relevant formulas before selecting from the performance table. Throttling devices are commonly used for flow rate adjustments but may waste energy if the actual flow rate significantly exceeds requirements. Adjusting fan speed or replacing the fan with a lower-pressure model is more economical. If the throttling device is fully open and flow remains too low, modify the pipe network to reduce resistance or increase fan speed. Belt-driven fans can adjust speeds by changing pulley diameters, but the maximum speed should not exceed the performance table's specified limit.

4-79, 4-2×79Performance and optional parts of centrifugal fans
Rotating Speed/(r/min)	Wind Speed/(m/s)	Complete Pressure/Pa	Air Flow/(m³/h)	Moter
Rotating Speed/(r/min)	Wind Speed/(m/s)	Complete Pressure/Pa	Air Flow/(m³/h)	No	Power/kW
4-79No.3A
2900	7.2 8.0 8.5 9.6 10.2 11.0 12.3 13.5	1196 1167 1157 1118 1069 1040 892 726	1970 2180 2430 2670 2900 3130 3480 3830	Y90S-2 (B35)	1.5
1450	3.5 4.0 4.5 4.9 5.3 5.7 6.4 7.0	304 294 284 275 265 255 226 177	990 1100 1220 1340 1450 1560 1740 1910	Y802-4 (B35)	0.75
4-79No.3.5A
2900	8.4 9.3 10.3 11.4 12.3 13.3 14.8 16.3	1628 1589 1569 1510 1461 1422 1206 981	3120 3460 3860 4240 4600 4960 5520 6070	Y100L-2 (B35)	3
1450	4.2 4.7 5.2 5.7 6.2 6.7 7.4 8.2	412 402 392 382 363 353 304 245	1560 1750 1930 2120 2300 2480 2760 3040	Y90S-4 (B35)	1.1
4-79No.4A
2900	9.6 10.7 11.9 13.0 14.1 15.2 16.9 186	2138 2079 2050 1981 1902 1853 1579 1275	4670 5220 5760 6310 6860 7410 8240 9080	Y132S1-2 (B35)	5.5
1450	4.8 5.35 5.9 6.5 7.0 7.6 8.5 9.3	530 520 510 490 481 461 392 324	2330 2610 2880 3160 3430 3710 4120 4540	Y90S-4 (B35)	1.1
4-79No.4.5A
2900	10.8 12.1 13.3 14.6 15.9 17.1 19.1 21.0	2697 2628 2599 2511 2412 2344 2001 1618	6640 7440 8200 8990 9790 10550 11720 12920	Y160M1-2 (B35)	11
1450	5.4 6.0 6.7 7.3 7.9 8.6 9.5 10.4	677 657 647 628 598 588 500 402	3320 3720 4110 4510 4890 5270 5860 6450	Y90L-4 (B35)	1.5
4-79No.5A
2900	12.0 13.4 14.8 16.2 17.6 19.1 21.2 23.3	3334 3256 3217 3099 2981 2903 2471 2001	9100 10200 11250 12350 13410 14480 16100 17720	Y160M2-2 (B35)	15
1450	6.0 6.7 7.4 8.1 8.8 9.1 10.6 11.7	834 814 804 775 745 726 618 500	4560 5100 5630 6180 6710 7240 8050 8860	Y100L1-4 (B35)	2.2
4-79No.6A
1450	7.4 8.2 9.1 10.0 10.8 11.6 13.0 14.3	1196 1177 1157 1118 1069 1040 892 706	7890 8820 9740 10700 11600 12520 13920 15320	Y132S-4 (B35)	5.5
960	4.9 5.5 6.0 6.6 7.2 7.7 8.6 9.4	530 520 510 490 471 451 402 314	5230 5840 6420 7080 7680 8290 9220 10100	Y100L-6 (B35)	1.5

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FAQ

Q: What information is required to request a quotation?: A: To provide a quotation, we would need the following parameters: Airflow, Pressure, Power, Voltage, and Temperature.

Q: How long does it take to receive a quotation?: A: How long does it take to receive a quotation?

Q: Can Decent team assist with the installation process?: A: Absolutely! We have extensive experience in providing installation services to numerous customers. Rest assured, we can handle the installation work for you without any issues.

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