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Press Releases & Editorials

FTL Technology Central Tyre Inflation (CTI) Seal system

A brief history of FTL Technology & CTI
As far back as 1985 FTL Technology started to investigate a CTI solution for companies such as Timoney Research and GKN Heavy-duty Axles. Much of this early work was centred around rotary unions, used successfully in the Paris - Dakar rally. More recently however the push was more for a simple high integrity inboard seal for sealing both pressurised air and oil. This led to the design of our dual material patented CTI seal.

Click here to view our CTI presentation (pdf).

Definition
Central Tyre Inflation (CTI) systems are mechanical systems that allow a driver to adjust a vehicle's tyre pressure while the vehicle is in motion. Using these systems, a truck can be operated with tyre pressures appropriate to the speed and strength of the road section being negotiated and the load being carried.

• Increased vehicle mobility ( thus fewer miles of road required)
• Reduced vehicle operating costs (i.e., tyre replacement and truck repair expenses, etc.)
• Reduced driver fatigue and medical complaints
• Reduced road maintenance requirements
• Reduced road surfacing requirements

Benefits of CTI
As well as a CTI system allowing optimum pressures to be maintained, it also greatly reduces the stress on the truck, trailer and driver. With the combination of properly functioning air suspensions and the central tyre inflation system, ride is greatly improved. Damage to the roads is greatly reduced, by softening the impact both the road and rig reap the benefits.

Now Available from FTL Technology

Seal Parameters	Value
Temperature Range	-40 degrees C to +150 degrees C
Max Speed	10m/s
Max Pressure	Air side12 bar / Oil side 0.5 bar
Shaft Surface Finish	0.2 -0.4 Ra (CLA 8-16 micro-inches)
Shaft Hardness	55 - 60 HRC
Concentricity	<0.1mm
Centre offset	<0.1mm
Concentricity	<0.1mm
Oil sealing lip	Poly-acrylate

Click here to view our CTI presentation (pdf).

END

Further Information
For further information relating to any of the above products, please contact Tony Snowdon on 0113 252 1061 or e-mail tonys@ftltech.co.uk