SYH — Double Inlet Backward Wing Centrifugal Fan

Midi Industrial is a renowned Asian manufacturer of HVAC fans and building ventilation fans for engineering projects - engineered to fuse aerodynamics, motor technology and intelligent control.

Design notes
The SYH sits at the top of this central air-conditioning fan group: double inlet, backward wing blade, belt drive, wheel diameters from 280 to 1600mm and airflow to 300,000 m3/h. Where the SYQ uses flat single plates, the SYH wing wheel follows an airfoil section. That shape is meant for the high-volume, higher-pressure corner of the duty map, and it holds efficiency better as the fan moves large quantities of conditioned air through a central plant.

What the backward wing wheel does
Two side inlets feed one large impeller, so the cabinet does not have to be excessively deep for a given airflow. The wing profile allows the wheel to work smoothly across a broad range, which helps when an AHU serves variable occupancy through the day. Belt drive keeps speed adjustable by pulley ratio; the motor mounts off the air stream, on a service frame, with slide rails for tension adjustment. Expect belt checks and occasional belt replacement as part of routine upkeep - the balance for having a flexible, serviceable drive on a machine of this size. Midi Industrial frames the SYH as a central station fan for projects where the volume target is the driving factor in selection.

Where it shows up
Central air-conditioning plants, large air handling units and main ventilation ducts in commercial complexes, factories, warehouses and public buildings. If your design brief calls for the largest airflow in the range and medium-to-high static pressure, size the SYH against those two targets first.

Impeller Diameter: 280-1600mm
Air Volume: 1000-300000 m³/h
Pressure: 0-3000 Pa
Drive Type: Belt drive

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