# Fans

Optimising performance whilst reducing emissions and noise is a must for today’s manufacturer of vehicles and applications in need of an advanced engine cooling system. Our range of open fans and ring fans provide maximum efficiency and precision cooling for any application or vehicle and are perfect when coupled with our air-sensing and electronic fan drives.

# MECHANICAL FIXED FAN VS DC FAN

## Series: AF5-X

The sub 400 mm fan market is heavily influenced by DC electric fans and rightly so, they have come a very long way. Fixed fans at a small diameter must be well engineered and set up to run efficiently, so that they pay in the long run. Smaller diameter one piece moulded fans are a very cost effective option, but care should be taken to get the best out of the installation.

Description: Axial Flow Fan

Typical Weight: 1.0 kg to 3.0 kg

Outer Diameter: 300 mm to 450 mm

No. of Blades: 5 to 11

Fan Pilot Options: 19 mm to 120 mm

Rotation: CW, CCW

Airflow Direction: Pull, Push

Recommended Fan Drives: FD5-A

# HIGH PRESSURE? NO PROBLEM!

## Series: AF10-X

Our range of mid sized axial flow fans are truly designed and optimised for use with Fan Drives. They are almost always designed to neatly fit the hub of the Viscous Drive with little to no wasted space, maximising the blade length. Fans in this range are on IC engines powering small delivery trucks right through to backhoe loaders and agricultural tractors. Very offten we are matched with stacked systems of heat exchangers and well sealed engine bays, so high static pressure is standard.

Description: Axial Flow Fan

Typical Weight: 2.5 kg to 4.0 kg

Outer Diameter: 420 mm to 610 mm

No. of Blades: 5 to 11

Fan Pilot Options: 25 mm to 100 mm

Rotation: CW, CCW

Airflow Direction: Pull, Push

Recommended Fan Drives: FD10-A, FD10-E

# LARGE, POWERFUL AND CONFIGURABLE

## Series: AF30-X

There is always a buzz in the engineering office when we are asked to work on a large diameter fan project, whether this is with or without a fan clutch. Going back to our fan fundamentals is always a real joy.

Power is proportional to the cube of the shaft speed:

MathJax example

${P1 \over P2} = ({N1 \over N2})^3$

Fixed Diameter fan (D)
P is the shaft power (kW)
N is the rotational speed (rpm)

Description: Axial Flow Fan

Typical Weight: 4.0 kg to 12.0 kg

Outer Diameter: 600 mm to 1000 mm

No. of Blades: 8 to 13

Fan Pilot Options: 25 mm to 300 mm

Rotation: CW, CCW

Airflow Direction: Pull, Push

Recommended Fan Drives: FD30-A, FD30-E, FD50-E

# LOW NOISE

## Series: AF5-R

Are ring fans quieter than open bladed fans? Well there’s a good question and one that’s not easy to answer. So, where is the noisiest part of a fan, arguably it is the tip of the blade on the trailing edge. Here the flow is turbulent, recirculating and most of the work is done. So does sealing the ends of the blades with a ring help, in short yes it helps prevent some of the recirculation but no it wont make your fan whisper. Please get in touch for more info.

Description: Axial Flow Ring Fan

Typical Weight: 1.0 kg to 3.0 kg

Outer Diameter: 300 mm to 450 mm

No. of Blades: 5 to 11

Fan Pilot Options: 19 mm to 120 mm

Rotation: CW, CCW

Airflow Direction: Pull, Push

Recommended Fan Drives: FD5-A

# REDUCED TIP CIRCULATION

## Series: AF10-R

Ring fans appear to be running in a duct, however they are not ducted. “Ducted Fans” are typically referring to the inlet and outlet conditions of the fan. Most ducted fans are used for HVAC applications and are lower pressure; aerofoil shaped blades are popular for ducted fans. The ring fans in our range are typically used with heat exchangers upstream and an engine bay downstream. These are much higher pressure. The rings purpose is for structural integrity, blade stiffness and installation advantages then looking at the total flow.

Description: Axial Flow Ring Fan

Typical Weight: 2.5 kg to 4.0 kg

Outer Diameter: 420 mm to 600 mm

No. of Blades: 5 to 11

Fan Pilot Options: 25 mm to 100 mm

Rotation: CW, CCW

Airflow Direction: Pull, Push

Recommended Fan Drives: FD10-A, FD10-E

# ENGINE MOUNTED SHROUD

## Series: AF30-R

Large diameter ring fans are common place on many on highway trucks, and so are complex shroud geometries to trap and direct that flow where you want it. Large design budgets and very high production volumes allow for engine mounted cowls that move with the engine, allowing very tight tip clearance between the fan and the shroud and therefore much improved efficiencies to the overall flow. Even if your production volumes are 100’s not 100’000’s this is something you should consider.

Description: Axial Flow Ring Fan

Typical Weight: 4.0 kg to 10.0 kg

Outer Diameter: 600 mm to 750 mm

No. of Blades: 8 to 13

Fan Pilot Options: 25 mm to 300 mm

Rotation: CW, CCW

Airflow Direction: Pull, Push

Recommended Fan Drives: FD30-A, FD30-E, FD50-E