1.manufacture quality certificate
2.for tunnel construction ,operation ,underground coal mine ventilation fan
3.stainless steel and aluminum alloy

High efficiency, low noise, large air volume and energy saving, they are applicable to large or extra large tunnel construction such as expressway tunnels, two-way railway tunnels and undersea tunnels. Angle of blade could be selectively adjusted in accordance with altitude to make fans reach the best operation state. 

SSF jet fan is a kind of new fan manufactured by the Company through multiple times of research and experiment in accordance with the most advanced level in the world and is applicable to the operation ventilation of highway, railway and subway tunnels. During installation, it shall either be in longitudinal tandem arrangement along the top of tunnel or in concentrated parallel arrangement at the cross section of tunnel inlet in accordance with ventilation network parameters. During operation, fan of corresponding number shall be started in accordance with visibility in tunnel to reach ventilation purpose. Thus, jet fan is a kind of ventilation means with simple maintenance and economic in installation and operation aspects. 

The core part of SSF jet fan is the technology of impeller. By referring to high technical level in the world and after continuous research and experiment, the series specifications and types meeting different demands are formed. They have the following characteristics:

(1) Blades of impeller have the characteristics of adjustable, light weight, corrosion resistance, high temperature resistance and non-breaking, which could ensure the service life of fans;

(2)  Cross section of blades is in wing shape, which has good aerodynamic shape and could ensure the performance of large pushing force of fans;

(3) Number and angle of blades could be changed according to the requirement to make the performance scope of fans be wide and meet demands of different users.

(4) New micropunch plate noise reduction structure is used, reaching the purpose of large sound absorption coefficient, wide sound absorption frequency band and effective reduction of noise.

(5) Direct air reversal can be conducted and air reversal efficiency is more than 65% of direct air, or could also reach more than 95% according to the requirements of users.

(6) Impeller, blades and motor can be removed separately, thus maintenance is convenient