DESIGN 20 A-SISW

Centrifugal Fan

AIRFOIL

Basic Description

Centrifugal fan with type A, airfoil, high efficiency rotor. Model tested and certified according to the standards AMCA Standard 210 and AMCA Standard 300. Construction features, dimensions and arrangements in accordance with standards ASHRAE / AMCA.

APLICATIONS:

Ventilation, exhaust, air conditioners, ventilation and filter boxes and air conditioning systems in general.

OPERATING CHARACTERISTICS:

Operating Range: Flow rate up to 100,000 m3 / h and static pressure up to 150 mmca.
Mechanical efficiency: Above 80% in the range of maximum yield
Power consumption profile: "LIMIT-LOAD"
Operating fluid: Clean Air.
Temperature: Up to 60°C – Standard construction.

CONSTRUCTION: (LIGHT INDUSTRIAL)

● Structure - Sides with square format, structured with folds forming carbon steel panels, providing security and robustness.
● Scroll - Carbon steel plates, welded on the sides, with aerodynamic spiral shape, sealed with polymeric thread.
● Inlet Cone - Carbon steel formed into hyperbolic flow profile.
● Rotor - Designed with a minimum safety factor of 1.2 at the maximum speed of the class, consisting of:
   - Center - Precision machined carbon steel, attached to the shaft with screws and key.
   - Backplate - Structured heavy gauge carbon steel disk attached to the center with nuts and bolts.
   - Blades - Carbon steel with aerodynamic profile (airfoil), structured, welded to the backplate and the cone of the rotor.
   - Rotor Cone - Carbon steel formed into hyperbolic flow profile.
● Shaft (on the applicable arrangements) - Carbon steel SAE 1045 precision machined, minimum safety factor of 1.2 at the maximum speed of the constructive class.
● Bearings (on the applicable arrangements) - Calculated for a minimum life L10 of 20,000 hours.
● Transmission - Pulleys and "V" belts, calculated for a minimum of 1.5 times the power of the drive.
● Welding - Electric in an inert atmosphere with qualified procedure and operators.
● Balancing - All rotating assembly is subjected to rigorous static and dynamic balancing, according to ISO 1940 and ANSI S2.19, grade G = 6.3.

SURFACE TREATMENT

According to the procedure of the standard paint of SOMAX the carbon steel parts are subjected to surface treatment through grade SA-2 abrasive blasting, further epoxy based paint with a minimum thickness of 25µ and epoxy finish paint with a minimum thickness of 25µ.