Name: SJG Series Mixed-Flow Inline Fans
SKU: -1

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SJG Series Mixed-Flow Inline Fans

Applications

The specific speed of SJG series mixed-flow fans falls between that of centrifugal and axial fans. They combine the high pressure coefficient of centrifugal fans with the high flow coefficient of axial fans, while also offering a wide high-efficiency operating range.

In addition to these distinctive aerodynamic characteristics, the structural design of mixed-flow inline fans greatly simplifies engineering design and installation. The air inlet and outlet are on the same axis and have the same dimensions. Flanges allow connection to ducts of the same diameter, making installation very convenient. Unlike centrifugal fans, which require a 90° bend in the duct during installation, mixed-flow inline fans take up less space and do not affect duct layout or routing. They are ideal for pressurizing straight ducts and for supply and exhaust ventilation. Their compact design is especially advantageous in plant rooms with limited space.

SJG series high-efficiency, low-noise mixed-flow inline fans are widely used in ventilation and air-conditioning systems in civil buildings, as well as in various industrial production sectors.

They can replace low-pressure centrifugal fans, reducing investment and floor space while simplifying design and installation. Mixed-flow inline fans are the best choice for duct ventilation applications where axial fans cannot provide sufficient pressure.

SJG mixed-flow FRP inline fans can convey air and corrosive gases. With an explosion-proof motor, they can also convey flammable and explosive gases. The conveyed gas temperature can reach 80℃.

Structural Features

Compared with centrifugal and axial fans, mixed-flow inline fans have a distinctive linear configuration and aerodynamic parameters that fall between those of the two fan types. A comparison of their basic structures and airflow patterns is shown in the figure below; a comparison of their aerodynamic performance curves is shown in the chart.

SJG Mixed-Flow Fan Technical Performance Parameters

Fan size No.	Impeller diameter (mm)	Airflow (m³h)	Total pressure / Pa	Speed (r/min)	Power / kW	Casing sound level / dB(A)	Approx. reference weight (kg)
2	285	520	352	2900	0.25	≤65	15
		760	280
		1040	220
		260	8B	1450	0.04	≤56
		380	70
		520	55
2.5	358	894	660	2900	0.75	≤75	22
		1220	600
		2180	440
		447	165	1450	0.09	≤60
		610	150
		1090	110
3	429	1498	960	2900	1.1	≤77	25
		3020	680
		4360	520
		749	240	1450	0.18	≤60
		1510	170
		2180	130
3.5	500	3974	800	2900	2.2	≤82	40
		5920	760
		6220	440
		1516	278	1450	0.37	≤68	42
		2240	268
		3118	250
		1000	120	960	0.18	≤60
		1480	116
		2064	108
	570	2530	390	1450	1.1	≤72	62
		4170	280
		5180	220
		2010	150	960	0.37	≤60	60
		3180	122
		4090	96
4.5	640	4050	480	1450	1.1	≤73	75
		6120	350
		7060	250
		2910	276	960	0.37	≤65	66
		3890	180
		4980	100
5	711	7062	370	1450	2.2	≤78	100
		8078	360
		8648	350
		3510	210	960	0.75	≤70	85
		4680	200
		6050	170
6	853	8200	870	1450	5.5	≤82	160
		12400	690
		17900	380
		6040	360	960	1.5	≤72	148
		8100	260
		10400	240
7	994	8110	400	960	3	≤78	210
		15040 18120	350 260
8	1136	10110 15070	400	960	5.5	≤82	315
			450
		25120	400

Performance and Selection

Dimensions and Installation Dimensions

SJG Series Mixed-Flow Inline Fan Dimensions and Installation Drawing

SJG Series Mixed-Flow Inline Fan Dimensions and Installation Table

Model	Center 1	φ2	φ3	Center 4	M2	M3	M4	L	H1	H	4-center
2	200	264	286	340	346	120	180	400	180	360	4-12
2.5	250	314	357	411	426	165	225	480	210	430	4-12
3	300	364	429	483	426	210	270	480	250	500	4-12
3.5	350	414	501	555	526	215	315	580	290	580	4-12
4	400	484	569	643	526	260	360	580	330	660	4-12
4.5	450	534	640	714	526	305	405	580	375	740	4-12
5	500	584	711	785	606	350	450	660	415	815	4-12
6	600	684	854	928	736	440	540	800	500	980	4-16
7	700	785	1000	1074	815	530	630	880	580	1120	4-16
8	800	885	1142	1216	955	620	720	1020	660	1280	4-16

Note: To ensure proper installation dimensions for users, the base mounting holes (4-center) are for reference only. Unless otherwise specified by the user, fan flanges are generally not drilled. Special requirements can be accommodated upon request.

SJG Series Mixed-Flow Inline Fan Dimensions and Installation Table

Model	D1	D2	D3	D4	L3	n×Φ1
2	200	234	300	355	200	6×φ7
2.5	250	284	350	428	250	8×φ7
3	300	334	400	499	300	8×φ9
3.5	350	384	450	570	350	10×①9
4	400	444	500	650	400	10×φ11
4.5	450	494	550	720	450	10×Φ11
5	500	544	600	791	500	12×φ11
6	600	644	700	933	600	12×Φ11
7	700	745	800	1074	700	18×Φ11
8	800	845	900	1236	800	18×Φ11

Note: The silencer is supplied separately and must be specified when ordering.

Frequently Asked Questions

SJG Series Mixed-Flow Inline Fans

Please provide the model, airflow, total/static pressure, installation orientation, air inlet and outlet configuration, material, insulation, motor voltage/frequency, control method, filter module, smoke control and fire protection requirements, quantity, and packaging requirements. Performance, dimensions, and certification information are subject to the confirmed product and order documents.

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