1. High efficient, large efficient area

 This type of fan is high-technical product designed by CAD, through optimization and preset property. The pressure is higher than other axial fan with same modal,and there are characteristics including big air flow,high-efficient, lower noise and wide high-efficient area.

2. Compact structure, convenient installation and reliable operation.

This type of fan has a smaller size compared with axial and centrifugal fan with the same air volume and pressure. It can be connected to air duct. Installation method can be vertical or horizontal. The fan is also characterized in convenient installation. 

3. Low noise 

The special designed blade shape can reduce aerodynamic noise at 3-5dB (A) compared with A-weighted sound level per unit air volume and air pressure. Even low speed can produce a higher pressure. In industrial mining enterprises and senior civil buildings, it can replace low pressure centrifugal fan and high pressure axial fan and reserve the need for attenuator.

 4. Extensive application

This series of products with single-speed and multi-speed two models can change the mounting angle, blades number and speed according to different occasions. 

II. Models

III. Application and maintenance instruction of SWF mixed flow fan

1. Maintenance 

      a. Check the blades and casing before installation. Any damage or deformation caused in transportation should be repaired before installation.

      b. Check for tight screw of blades. If blades touch the internal casing or there is uneven gap between blades, we should make adjustment before installation

      c. Make sure there is no unknown object in the fan or the duct before starting

      d. Check the motor for normal insulating property. Make sure there is no abnormal vibration or touch after power on

      e. In normal operation, the machine should be shut down for check if there are any of the listed problems: ① motor temperature exceeds 70℃; ② smoke comes out from the motor; ③strong vibration or friction sound.

2. Trouble shooting

  Fan vibration can be cause by many reasons. Please check the following items:

         a. Impeller touched the duct and produces abnormal noise and vibration;

         b. Loose anchor bolts at the support will also cause vibration;

         c. Deformed impeller or loose bolts will cause vibration;

         d. Loose coupling screw of the impeller shaft or deformed principal axis;

         e. Unbalanced impeller, damaged bearing caused by loose coupling screw of the motor and support will produce strong vibration.

3. Heat

      After a period of operation under normal temperature, a over heated motor may be cause by the following: 

         a. Overload operation. Fit clearance too small.

         b. Skew shaft and bearing. Two bearings non-concentric. 

         c. Too much resistance makes the motor overload operation

         d. Power supply too low, or open phase running