Mixed flow fan

1. Performance and Features

The SWF series mixed flow fan is a new type of fan that lies between axial flow and centrifugal fans. It combines the high pressure of a centrifugal fan with the high airflow rate of an axial flow fan. It features high efficiency, good energy savings, low noise, compact structure, and easy installation.

It is widely used for ventilation and air exchange in industrial and mining enterprises, hotels, museums, gymnasiums, basements, air conditioning systems, textile mills, ships, cold storage facilities, and other places. It is especially suitable for duct pressurization, supply air, and exhaust air in high-rise buildings and general buildings. It can also be used as the main fan section in a central air conditioning unit or for general factory ventilation and exhaust.

The SWF-1I model can replace high-pressure axial flow fans. The SWF-II model is two-speed and can serve dual purposes. The conveying medium shall have a temperature between -20°C and 80°C (temperature below 90°C), with a dust content not exceeding 150 mg/m³. The power supply is three-phase, 380V, 50Hz.

2. Operation and Maintenance

For larger capacity three-phase asynchronous motors (rated power of 7.5kW or above), due to the high inrush current during startup, direct starting is not allowed. Star-delta (Y-△) reduced voltage starting or other suitable starting methods shall be used.

Before installation, carefully check whether the fan blades and housing have been damaged or deformed during transportation. Check whether the blades and the air cylinder touch the housing due to loose connecting screws. If the gap between blades and the air cylinder is uneven, adjust it before installation.

Before starting the fan, first check whether there are any objects inside the fan and the duct that may hinder operation.

Check whether the motor insulation is in good condition. After connecting the power supply, check for friction, collision, and abnormal vibration.

During normal operation, stop the fan immediately and check if any of the following conditions occur:
① Motor temperature exceeds 70°C
② Motor smokes
③ Strong vibration or significant collision noise occurs

When wiring a two-speed motor, strictly follow the wiring diagram inside the motor terminal box.