SINGLE INLET CENTRIFUGAL FAN DOUBLE INLET CENTRIFUGAL FAN

Systemair’s range of centrifugal fans offer the engineers the flexibility to choose the most suitable sizes and configurations to suit any site

condition. With over 2000 variations of diameter, width and impeller type, specifications are virtually tailor-made to individual needs. We offer both

single and double inlet forms and in three classes of construction to suit almost any applications.

There is a choice of eight impeller types, providing optimum performance to meet any duty. Casings are made of mild steel, welded and many are

of semi-universal construction allowing the discharge angle to be modified to suit customer’s requirements. Many additional features and

ancillaries can be supplied on request, example; split casings, carbon steel and stainless steel impellers.

CENTRIFUGAL FANS – TYPES OF BLADES

There are many different types of Centrifugal Fans covering air volumes from 50 CFM to 60,000 CFM and from 0.1 inches water gauge to 60

inches water gauge. Each application requires a fan with different characteristics, whether it be the blade design, the width of the casing or even

the method of drive. By way of a guide as to which is the best for certain projects, we list below information that might assist the potential user.

PADDLE BLADES :

This type of fans is used for the conveying of dust, woods and paper

refuse, cotton fly etc. Since the blade design prevents ‘Build up’ of

waste materials, discharge velocities vary dependent upon what is

being conveyed in the air-stream. Normally in the region of 1500-

4000 feet per minute.

MULTIVANE OR FORWARD CURVED BLADES :

Used for general ventilation purposes – not good for dust, etc. Limited

pressure characteristics. Normal discharge velocities 1000-2500 feet

per minute.

BACKWARD CURVED OR BACKWARD INCLINED BLADES :

Non-overloading power characteristic suitable for very light dust

applications (e.g. clean side of dust collector) where a good efficiency

is required. Used for high pressure ventilation systems or where the

system resistance could fluctuate. Normal discharge velocities 1800-

3000 feet per minute.

AEROFOIL SECTION BLADES :

The most efficient of all centrifugal fans, ideally suited for general ventilation projects where there is no possibility of dust contamination.

Recommended for high pressure ventilation systems or where the system resistance could fluctuate. Normal discharge velocities 1500-2800 feet

per minute.

HIGH PRESSURE BLOWERS :

As their name suggests, these fans are supplied where the requirement is for high velocities, e.g. Air curtains, refuse conveying, etc. Normal

discharge velocities 3000-6000 feet per minute.

SPECIAL NOTE :

Since Forward Curved and Paddle Blade fans have overloading power characteristic it is important the selected static pressure is achieved. Any

reduction in the requirement could easily overload the motor.

Backward Inclined Backward Curved Forward Curved Radial

Open Paddle Backplate Paddle Aerofoil Radial Tipped

CENTRIFUGAL FAN

1456.5129511861110975873797694655593535478439398385.5325296.5N

133512131090981890807730663497545495440404367333299270L

915830810710660635485485430430430400350325310300290K

133512131090981809807730663597545495440404367333299270J

167015101365124011201023920840759690328.5566521427427387353H

7676767663635050505050505038383838G

1271111029283766763565050393835302624F

126011431030937848770695613570517470422386341.5311296260E

14741346121611051000905820746.2672602556498.5457.5409375340308D

SHAFT

DIA.

FAN SIZE

C

B

A

CL. II

CL. I

142513701320112010601020880720690660635610580535510485445

1568.51407128112051055935867764718648590533487.5446.5406.5362333.5

27052435221820661837166514961342124511301033914.5875790725660635

1009090757563.55757505045453838322525

9090757563.563.55757505045383832322525

AS165AS145AS135AS120AS110AS100AS90AS80AS75AS65AS60AS55AS50AS45AS40AS35AS30

1443.5129512011125975873787684648585527470424.5397.5357.5313240.5N

259723432139.5194217561599.51438131011951097998.5910812734686622571L

7676767663635050505050503838383838K

244521911987.5179016301473.51338121010959978985810736667610546495J

1670151013651240112010239208407596906285566521427427387353H

7676767663635050505050503838383838G

16115614012811210510094797369636363604540F

126011431030937848770635613570517470422386341.5311296260E

1438130211781068.5965870790713649587539.5481438393354323292D

DIA.

SHAFT

FAN SIZE

C

B

A

CL. II

CL. I

20241864171915941422132511601080999930868.5806703654604.4564.4533

1568.51407128112051055953867764718648590533487.5446.5406.5362333.5

27052435221820661837166514961342124511301033914.5875790725660635

10088.876.276.276.263.563.557.1557.1550.850.850.850.838383838

9076.263.563.563.550.850.850.850.850.838383838383831.75

AW165AW145AW135AW120AW110AW100AW90AW80AW75AW65AW60AW55AW50AW45AW40AW35AW30

S.I.S.W. DIMENSIONS

D.I.D.W. DIMENSIONS

DIMENSIONS IN MILIMETERS

DIMENSIONS IN MILIMETERS

Systemair Sdn Bhd

Lot 3692, Kampung Jaya Industrial Area,

Jalan Kusta, 13 ½ Miles,

4700 Sungai Buloh, Selangor, Malaysia.

Tel : 60(3) 6157 1177

Fax : 60(3) 6156 6618

Email : info@systemair.my

Website : www.systemair.com

FAN DISCHARGE POSITION & DIMENSIONS