purpose
　　 G/Y4-68 boiler centrifugal induced draft fanIt is a series of ventilation and induced draft fans suitable for steam boilers below 230T/h in thermal power plants. Unless otherwise specified, G4-68 type can also be used for mine ventilation and general ventilation.
The medium conveyed by the ventilation fan is air, and the maximum temperature shall not exceed 80 ℃; The medium conveyed by the induced draft fan is flue gas, and the maximum temperature shall not exceed 250 ℃.
Before the induced draft fan, a dust removal device with a dust removal efficiency of not less than 85% must be installed to reduce the dust content of the flue gas entering the fan and improve its service life.
2、 Performance parameter table of centrifugal induced draft fan for G/Y4-68 boiler
The parameters provided in the performance table. The performance of the ventilation fan is calculated based on an air medium with a gas temperature of 20 ℃, atmospheric pressure of 101325Pa, and gas density of 1.2kg/m3; The performance of the induced draft fan is calculated based on a flue gas medium with a gas temperature of 200 ℃, atmospheric pressure of 101325Pa, and gas density of 0.745kg/m3.
Performance parameter table of centrifugal induced draft fan for G/Y4-68 boiler

PRODUCT MODEL	rotational speedr/min	Serial Number	complete PressurePa	flow amountm3 / h	electric move machine
					type number	work ratekW
G4-68 № 8 D	1450	1	2178~1481	16985~30134	Y180M－4	18.5
G4-68 № 9 D	1450	1	2757~1874	24183~42906	Y200L－4	30
	960	1	1207~824	16011~28407	Y160L－6	11
G4-68 № 10 D	1450	1	3404~2315	33173~58856	Y250M－4	55
	960	1	1491~1010	21963~38966	Y180L－6	15
	730	1	863~589	16701~29631	Y160L－8	7.5
G4-68 №11.2 D	1450	1	4277~2904	46606~82688	Y280M－4	90
	960	1	1874~1275	30856~54745	Y225M－6	30
	730	1	1079~736	23464~41629	Y180L－8	11
G4-68 №12.5 D	1450	1	5327~3620	64791~114952	Y315L1－4	160
	960	1	2335~1589	42896~76106	Y280S－6	45
	730	1	1354~912	32619~57872	Y225M－8	22
G4-68 № 14 D	1450	1	6681~6327	91027~114518	Y355M2－4	250
		2	6023~4532	126263~161499	Y355L2－4	315
	960	1	2923~2776	60266~75819	Y315S－6	75
		2	2639~1991	83595~106924	Y315M1－6	90
	730	1	1697~1148	45827~81307	Y280S－8	37
G4-68 № 16 D	960	1	3826~2600	89960~159606	Y355M1－6	160
	730	1	2207~1501	68407~121367	Y315M1－8	75
	580	1	1393~952	54351~96429	Y315S－10	45

Performance parameter table of Y4-68 boiler centrifugal induced draft fan

PRODUCT MODEL	Speed r/min	Serial Number	Total pressure Pa	Flow rate m3/h	Electric motor
					Model number	Power kW
Y4-68 № 8 D	1450	1	1540~1059	15889~29038	Y160L－4	15
Y4-68 № 9 D	1450	1	1952~1844	22623~28864	Y180L－4	22
		2	1756~1344	31984~41345	Y200L－4	30
	960	1	853~589	14978~27374	Y160M－6	7.5
Y4-68 № 10 D	1450	1	2413~1658	31033~56715	Y225M－4	45
	960	1	1059~726	20546~37549	Y180L－6	15
	730	1	608~422	15623~28553	Y160M2－8	5.5
Y4-68 №11.2 D	1450	1	3021~2080	43599~79681	Y250S－4	75
	960	1	1324~912	28866~52754	Y200L2－6	22
	730	1	765~530	21950~40115	Y180L－8	11
Y4-68 №12.5 D	1450	1	3767~3561	60611~77331	Y315S－4	110
		2	3394~2590	85692~110772	Y315M－4	132
	960	1	1648~1138	40129~73339	Y250M－6	37
	730	1	952~657	30515~55768	Y225S－8	18.5
Y4-68 № 14 D	1450	1	4728~3247	85154~155627	Y355M2－4	250
	960	1	2070~1422	56378~103036	Y315S－6	75
	730	1	1197~824	42871~78350	Y250M－8	30
Y4-68 № 16 D	960	1	2708~2560	84156~107372	Y315L1－6	110
		2	2433~1854	118979~153803	Y315L2－6	132
	730	1	1560~1079	63994~116954	Y315S－8	55
	580	1	991~677	50844~92922	Y315S－10	45