4-79, 4-2X79 centrifugal fans

NegotiableUpdate on 05/08

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

1. The 4-79 centrifugal fan can be used for indoor ventilation and air exchange in general factories and large buildings. It can be used for both gas input and output. The types of gases transported are air and other unnatural gases that are harmless to human health and non corrosive to steel materials. There shall be no viscous substances in the gas, and the dust and hard particles contained shall not exceed 150mg/m3. The temperature of the gas shall not exceed 80 ℃. 2. The fan can be made into two forms: clockwise rotation or counterclockwise rotation. When viewed from one end of the motor and the impeller rotates clockwise, it is called a clockwise cyclone machine, represented by clockwise; Rotating counterclockwise is called a reverse fan, represented by reverse. The outlet position of the fan is represented by the angle of the air outlet of the casing. The 4-79 type fans No.3-12 are all made in various forms when they leave the factory, and the user unit installs them in the required positions according to requirements. They do not need to be specified when ordering. The adjustment range for the No.3 air outlet position is 0-225, with an interval of 45. The adjustment range of the air outlet position for No.3.5-6 is 0-225, with an interval of 22.5. The transmission mode for No.3.5-6 is A-type transmission; The adjustment range of No.7-8 air outlet position is 0-180, the fan interval is 22.5, and the transmission mode of No.7-8 is C-type transmission; The transmission mode from No.10 to No.20 is E-type transmission, and the position of the air outlet is fixed in three types: 0, 90, and 180, which cannot be adjusted and must be specified when ordering. The dual inlet types of No.10~20 are all made into three fixed outlet positions: 0, 90, 180

Product Details

1. Usage 4-79 typeCentrifugal ventilation fanIt can be used for indoor ventilation and air exchange in general factories and large buildings, and can be used for both gas input and output. The types of gases transported are air and other unnatural gases that are harmless to human health and non corrosive to steel materials. There shall be no viscous substances in the gas, and the dust and hard particles contained shall not exceed 150mg/m3. The temperature of the gas shall not exceed 80 ℃.

2. The fan can be made into two forms: clockwise rotation or counterclockwise rotation. When viewed from one end of the motor and the impeller rotates clockwise, it is called a clockwise cyclone machine, represented by "clockwise"; Rotating counterclockwise is called a reverse fan, represented by "reverse".
The outlet position of the fan is represented by the angle of the air outlet of the casing. The 4-79 type fans No.3-12 are all made in one form at the factory, and the user unit installs them in the required position according to the requirements. They do not need to be specified when ordering. The adjustment range for the No.3 air outlet position is 0 ° -225 °, with an interval of 45 °. The adjustment range of the air outlet position for No.3.5-6 is 0 ° -225 °, with an interval of 22.5 °. The transmission mode for No.3.5-6 is A-type transmission; The adjustment range of No.7-8 air outlet position is 0 ° -180 °, and the fan interval is 22.5 °. The transmission mode of No.7-8 is C-type transmission; The transmission mode from No.10 to No.20 is E-type transmission, and the position of the air outlet is fixed in three ways: 0 °, 90 °, and 180 °, which cannot be adjusted and must be specified when ordering. The dual inlet types of No.10~20 are all made with three fixed outlet positions: 0 °, 90 °, and 180 °, and the transmission mode is E-type transmission. Please specify when ordering.

3. Structural characteristics: The No.3-6 fans in the 4-79 type fan are mainly composed of impellers, casings, air inlets, and other parts matched with direct connected motors; In addition to the above-mentioned parts, No.7-20 also has transmission parts, etc.
① The impeller consists of 16 backward inclined circular arc thin plate blades, a curved front plate, and a flat rear plate, all of which are made of steel plates. And it has undergone dynamic balance correction. Good air performance, high efficiency, low noise, and balanced operation.
② The casing is made in two different types, with shells No.3-12 made as a whole and cannot be disassembled; The casing of No.14-20 is made into two open types, divided into two halves along the horizontal plane of the center and connected by bolts.
③ The air inlet is made as a whole and installed on the side of the fan. The cross-section parallel to the axial direction is curved, which allows gas to enter the impeller smoothly with minimal loss.

④ The transmission part consists of a main shaft, a bearing box, rolling bearings, and pulleys.

4-79 typeCentrifugal ventilation fanPerformance parameter table

Machine number	rotational speed (rpm)	Air volume (m 3 /h)	Total pressure (Pa)	power (kW)
3A	2900	1970 2180 2430 2670 2900 3130 3480 3830	1196 1167 1157 1117 1068 1039 892 725	1.5
3A	1450	990 1100 1220 1340 1450 1560 1740 1910	304 294 284 274 265 255 225 176	0.75
3.5A	2900	3120 3460 3860 4240 4600 4960 5520 6070	1627 1588 1568 1509 1460 1421 1205 980	3
3.5A	1450	1560 1750 1930 2120 2300 2480 2760 3040	412 402 392 382 363 353 304 245	1.1
4A	2900	4670 5220 5760 6310 6860 7410 8240 9080	2316 2078 2048 1980 1901 1852 1578 1274	5.5
4A	1450	2330 2610 2880 3160 3430 3710 4120 4540	529 519 510 490 480 461 392 323	1.1
4.5A	2900	6640 7440 8200 8990 9790 10550 11720 12920	2696 2626 2598 2510 2412 2343 2000 1618	11
4.5A	1450	3320 3720 4110 4510 4890 5270 5860 6450	676 657 647 627 598 588 500 402	1.5
5A	2900	9100 10200 11250 12350 13410 14480 16100 17720	3334 3255 3216 3099 2981 2902 2471 2000	15
5A	1450	4560 5100 5630 6180 6710 7240 8050 8860	833 813 804 774 745 725 617 500	2.2
6A	1450	4890 8820 9740 10700 11600 12520 13920 15320	1196 1176 1157 1117 1068 1039 892 706	5.5
6A	960	5230 5840 6420 7080 7680 8290 9220 10100	529 519 509 490 470 451 402 313	1.5
7C	1250	10820 12120 13340 14650 15850 17150 19160 20850	1206 1186 1167 1127 1078 1049 902 715	7.5
7C	1120	9650 10830 11950 13100 14200 15350 17200 18800	970 951 931 902 863 843 725 549	5.5