Powerhouse high wind negative pressure fan

Powerhouse high wind negative pressure fan

$82.89≥1Set/Sets

Payment Type:	T/T
Incoterm:	FOB
Min. Order:	1 Set/Sets
Transportation:	Ocean,Land
Port:	chongqing,Cuntan

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Product Description

Product Attributes

Model No.: FBS-1220

Classification: Negative pressure fan (350 thick)

Name: FY Series - Type C

Rated Voltage (V): 380

Rated Current (A): 2.1

Rated Power (KW): 0.75

Impeller Speed (rpm): 450

Maximum Air Volume （m³/h): 30000

Applicable Area（㎡）: 150-180

Fan Blade Diameter (mm&ft): 1100

Product Size （mm): 1220*1220*350

Packaging & Delivery

Selling Units	:	Set/Sets
Package Type	:	container
Picture Example	:

Product Description

Nowadays, more and more factories use Negative Pressure Fan and HVLS Fans for cooling and exhaust. People not only enjoy the coolness brought by Industrial Fans, but also a guarantee for our physical safety, especially in some rubber factories or factories with high levels of harmful gases.

For the operation of negative pressure fan, eddy current noise is often generated. How to reduce these noises? The impeller blades of the negative pressure fan are designed and manufactured as swept back twisted blades, that is, the impeller blades of the negative pressure fan are moderately tilted forward at the exhaust outlet and moderately tilted backward at the inlet, which can avoid sharp changes in the gas flow channel. Prevent gas from generating eddy currents, thereby reducing aerodynamic noise generated by centrifugal negative pressure fan.
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The installation of mufflers and silencers at the inlet and outlet of negative pressure fans generally utilizes porous media to absorb sound energy. When sound waves pass through the porous media at the inlet and outlet, the sound waves will excite numerous small air molecules in the porous media to undergo intense motion. Most of the sound energy is used to overcome frictional and viscous resistance and convert it into heat energy, thereby reducing the aerodynamic noise generated by centrifugal negative pressure fans.

In addition, due to the fact that the size of the impeller blade exhaust port of a centrifugal negative pressure fan is usually larger than the size of the inlet port at the front plate, when the airflow flows in the negative pressure fan, many vortices will form at the arc section of the inlet port. Vortex will frequently collide with the volute and inlet components of the negative pressure fan, resulting in aerodynamic noise. The design and production of rectification rings and baffles can be carried out at the outer periphery of the negative pressure fan volute at the inlet of the negative pressure fan, which can effectively prevent the formation of eddy currents at the inlet of the negative pressure fan, thereby reducing the aerodynamic noise generated by the centrifugal negative pressure fan.

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