4－68 centrifugal fan

4－68 Centrifugal fan

I. Purpose of the fan：
　　The 4-68 centrifugal fan (hereinafter referred to as the fan) can be used for general ventilation. Its operating conditions are as follows:
　　1、Application locations: Used for indoor ventilation in general factories and large buildings, it can serve both as an air intake and exhaust.
　　2、Types of gases to be transported: Air and other non-flammable, non-toxic to humans, and non-corrosive to steel materials gases.
　　3、Impurities in the gas: The gas must not contain viscous substances, and the dust and hard particles should not exceed 150 mg/m³.
　　4、Temperature of the gas: must not exceed 80 degrees.

II. Structural characteristics of main components
　　The No.2.8-5 model of the 4-68 fan mainly consists of an impeller, casing, air inlet, and other parts directly connected to the motor. The No.6.3-20 model includes a transmission section in addition to the above components.
　　1、Impeller: Composed of 12 backward-inclined airfoil blades welded between an arc-conical cover and a flat disc. All parts are made of steel plate, statically and dynamically balanced for correction, ensuring excellent aerodynamic performance, high efficiency, and smooth operation.
　　2、Housing: The housing is a volute-shaped structure welded from ordinary steel plates. It is designed in two different types. Models No. 2.8–12.5 feature an integral housing that cannot be disassembled. Models No. 16 and 20 have a three-part housing, which is divided into two halves along the horizontal center plane, with the upper half further split into two parts along the vertical centerline, connected by bolts.
　　3、Inlet: designed as a convergent streamlined integral structure, bolted to the fan inlet side.
　　4、Transmission group: Consisting of the main shaft, bearing housing, rolling bearings, pulley or coupling, etc. The main shaft is made of high-quality steel. For fan models No. 6.3–12.5, the bearing housing has an integrated structure, with a thermometer and oil level indicator installed on the bearings. For fan models No. 16 and 20, two parallel bearing seats are used, each equipped with a thermometer and lubricated with bearing grease.

III. Performance Parameter Table of 4-68 Centrifugal Ventilator (1)

Machine number	Rotational speed r/min	Power KW	Wind Volume m3/h	Wind pressure Pa		Machine number	Rotational speed r/min	Power KW	Wind Volume m3/h	Wind pressure Pa
2.8A	2900	Y802-2-1.1	1131-2262	971-657		6.3D	1450	Y132S-4-5.5	8320-14761	1324-922
	1450	Y801-4-0.55	565-1131	245-167			960	Y112M-6-2.2	5508-9773	579-402
3.15A	2900	Y90S-2-1.5	1825-3435	1246-853		8D	1450	Y180M-4-18.5	17585-30774	2158-1501
	1450	Y801-4-0.55	912-1718	314-216			960	Y132M2-6-5.5	11643-20375	942-657
3.55A	2900	Y100L-2-3	2708-5013	1608-1108			730	Y132M-8-3	8853-15403	549-383
	1450	Y801-4-0.55	1354-2507	402-275		10D	1450	Y250M-4-55	35420-61179	3422-2422
4A	2900	Y112M-2-4	3984-5633	2069-1932			960	Y200L1-6-18.5	23450-40505	1510-1059
		Y132S1-2-5.5	6182-7281	1795-1432			730	Y160L-8-7.5	17832-30801	873-618
	1450	Y802-4-0.75	1992-3641	520-353		12.5D	960	Y280S-6-45	45800-79111	2354-1657
4.5A	2900	Y132S2-2-7.5	5790-10485	2658-1834			730	Y225S-8-18.5	34828-60157	1363-961
	1450	Y90L-4-1.1	2895-5242	667-461		6.3C	2240	Y180M-2-22	12852-22803	3159-2197
5A	2900	Y160M2-2-15	8050-14490	3315-2305			2000	Y160M2-2-15	11476-20359	2511-1756
	1450	Y100L1-2-2.2	4025-7245	824-579			1800	Y180M1-2-11	10328-18324	2040-1422

 

Machine number	Rotational speed r/min	Power KW	Wind Volume m3/h	Wind pressure Pa		Machine number	Rotational speed r/min	Power KW	Wind Volume m3/h	Wind pressure Pa
6.3C	1600	Y132S2-2-7.5	9180-16287	1608-1118		12.5C	900	Y280S-6-45	42938-74166	2069-1451
	1400	Y132S-4-5.5	8032-7172	1236-863			800	Y225M-6-30	38168-65926	1638-1147
	1250	Y112M-4-4	8098-6426	981-687			710	Y200L2-6-22	33874-58509	1285-902
	1120	Y100L2-4-3	7255-5737	758-549			630	Y180L-6-15	30057-51917	1010-706
	1000	Y100L2-4-2.2	6478-10179	628-441			560	Y160L-6-11	26717-46148	804-559
	900	Y90L-4-1.5	5164-9162	510-353			500	Y160M-6-7.5	23855-41204	638-451
	800	Y90S-4-1.1	4590-8144	402-284			450	Y132M2-6-5.5	21469-37083	520-363
8C	1800	Y200L2-2-37	21830-38202	3315-2315			400	Y132M1-6-4	19084-32963	412-284
	1600	Y200L1-2-30	19404-33958	2619-1834		16B	960	Y355M2-6-200	96052-165908	3864-2717
	1400	Y180M-4-18.5	16979-29713	2010-1402			800	Y135M1-6-90	80043-89745	2687-2628
	1250	Y160L-4-15	15159-26528	1599-1118				Y315M2-6-110	99448-138257	2540-1883
	1120	Y160M-4-11	13583-23770	1285-892			710	Y315S-6-75	71038-122703	2118-1481
	1000	Y132M-4-7.5	12128-21224	1020-716			630	Y280M-6-55	63034-108877	1667-1167
	900	Y132S-4-5.5	10915-19101	657-461			560	Y250M-6-37	56030-96780	1314-922
	800	Y112M-4-4	9702-16979	657-461			500	Y225M-6-30	50027-86410	1049-736
	710	Y100L2-4-3	8611-15069	520-363			450	Y200L1-6-18.5	45024-77769	853-598
	630	Y100L1-4-2.2	7641-13371	402-284			400	Y180L-6-15	40022-69128	667-471
10C	1250	Y225S-4-37	30534-52740	2560-1795			355	Y160L-6-11	35519-61351	530-373
	1120	Y200L-4-30	27358-47256	2050-1442			315	Y160M-6-7.5	31517-54439	412-294
	1000	Y180L-4-22	24427-42192	1638-1147		20B	710	Y335M-8-220	138747-239654	3305-2324
	900	Y160L-4-15	21984-37974	1324-932			630	Y335M2-8-160	123113-212650	2599-1824
	800	Y160M-4-11	19541-33754	1049-736			560	Y315M3-8-110	109434-189023	2060-1442
	710	Y132M-4-7.5	17343-29956	824-579			500	Y315M2-8-75	97709-168770	1638-1147
	630	Y132S-4-5.5	15389-26581	647-461			450	Y315S-8-55	87938-151893	1324-932
	560	Y112M-4-4	13679-23627	510-363			400	Y280M-8-45	78167-135016	1049-736
	500	Y100M-4-3	12214-21096	412-284			355	Y250M-8-30	69373-119827	824-579
12.5C	1120	Y200S-4-75	53434-66388	3207-3040			315	Y225M-8-22	61557-106325	647-461
		Y280M-4-90	72865-92296	3207-2256			280	Y200L-8-15	54717-94511	510-363
	1000	Y250M-4-55	47710-59276	2560-2422			250	Y180L-8-11	48855-84385	412-284
		Y280S-4-75	65058-82407	2315-1795