4-70 centrifugal fanDetailed product description：

1.4-70 centrifugal fan structure type:
The air outlet positions of 4-70 centrifugal fans No. 2.8-6 are 0 ° -225 °, with an interval of 45 °, and the transmission mode is A-type transmission; The air outlet positions of No. 7-12 are 0 °, 90 °, and 180 °, and the transmission mode of No. 7-12 is C-type transmission.
The 4-70 type centrifugal fans No. 2.8-6 are mainly composed of impellers, casings, air inlets, and other parts matched with direct connected motors; In addition to the above-mentioned parts, there are also transmission parts such as No. 7-12.
1) The impeller consists of 10 backward inclined circular thin plate blades, a curved front plate, and a flat rear plate. All are made of steel plates and have undergone dynamic and static balance correction, with good air performance, high efficiency, and smooth operation.
2) The air inlet is made as a whole and installed on the surface of the fan. The cross-section parallel to the axial direction has a curved shape, which allows gas to enter the impeller smoothly with minimal loss.
3) The transmission part consists of a main shaft, bearing housing, rolling bearings, and pulleys.

Performance parameter table of 4-70 centrifugal fan

machine number (No.)	Speed (r/min)	Flow rate (m³	Total pressure (pa)	Motor power (kw)
two point eight	two thousand and nine hundred	1330-2450	600-970	one point one
three	two thousand and nine hundred	1715-3133	607-1209	one point one
	one thousand four hundred and fifty	857-1567	252-302	zero point seven five
three point two	two thousand and nine hundred	1975-3640	800-1270	one point five
	one thousand four hundred and fifty	991-1829	200-320	one point one
three point five	two thousand and nine hundred	2723-4975	827-1640	two point two
	one thousand four hundred and fifty	1362-2488	207-411	one point one
three point six	two thousand and nine hundred	2930-5408	1090-1650	three
	one thousand four hundred and fifty	1470-2710	280-410	one point one
four	two thousand and nine hundred	4000-7427	1000-2150	five point five
	one thousand four hundred and fifty	2032-3714	270-537	one point one
four point five	two thousand and nine hundred	5788-10575	13366-2721	seven point five
	one thousand four hundred and fifty	3804-5288	342-680	one point one
five	two thousand and nine hundred	7939-14506	1687-3359	eleven
	one thousand four hundred and fifty	3970-7253	422-840	two point two
six	one thousand four hundred and fifty	6859-12533	607-1209	four
	six hundred and ninety	4541-8298	266-530	one point five