BLEX® Technology

Hightech textile strips at the tip of the blade (BLEX - Blade Extensions) eliminate the turbulences and giving you a considerable noise reduction.

Smart Technology
at your blade tips!

The blade extensions at the tip of the blades are made of flexible high-tech fabric designed to adapt the fan diameter to the contour of the shroud thereby reducing the clearance close to ZeroTip®.

Turbulences are reduced and slippage eliminated
providing you with 3 astonishing advantages:

Extra performance!
Extra performance!

Get dramatic increase in static pressure with the same fan and rotation speed just by adding BLEX® to the configuration!

Half the noise!
Half the noise!

With WingFan’s BLEX® technology, the noise may be reduced by up to 10 dB(A). The noise at the fan blade tips caused by air slippage and turbulence is significantly reduced due to minimized tip clearances.

Maximized efficiency!
Maximized efficiency!

The same air flow can be achieved while reducing pitch angle and fan speed, thus lowering power consumption. The overall system efficiency is increased by up to 20% resulting in significant fuel/energy savings.

like no other

The biggest challenge in developing BLEX®, was an issue common to all previously available blade extension technologies on the market: wear and tear up to the point of total failure.

WingFan's BLEX® technology is designed to endure stresses many times that which occurs in the field - with the perfect blend of material properties and bonding processes.

Technology explained


Recommended tip clearances can be as high as 1.5% of the fan diameter.

With BLEX® technology tip clearance can be reduced to 0.2% depending on the application.

Why are
BLEX flexible?

Long-term field tests have shown, that flexibility of the blade extension material is paramount to long-life performance under real world conditions. BLEX® also compensates momentary contact with the shroud, caused by external shocks typically seen in mobile applications, to protect the drive shaft and the fan blades from permanent damage.

WingFan's advanced
welding process

WingFan's advanced welding process was developed specifically for BLEX® and ensures a permanent bond between BLEX® and the blades. Even extreme centrifugal forces in the most hostile environments are handled with ease for lasting performance.

BLEX® material &

High-tech material recently developed for high performance competitive sport is used exclusively for BLEX® technology. Combined with our advanced welding technology - only available from WingFan - we can provide you with a solution you can trust. No matter what temperature extremes you have in your application, BLEX® will withstand all stresses even in the harshest environments.

The tensile strength surpasses the required safety factor by far, ensuring a long life cycle in continuous operation. Our unique welding process provides twice the shear force resistance of the required maximum value. Highest durability is also achieved by the greatly enhanced chemical resistance of the material against all fluids typically found in an engine bay.

State-of-the-art BLEX® technology is available with all thermo-plastic blade profiles in the WingFan product range.

Let’s talk.

Ask us how we can help you get the best performance, easily.

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