STIS | Semi-automatic Tire Inflation System

Precise tire pressure adjustment when vehicle is stationary | STIS

Time-tested for many years, the STIS allows the tire pressure to be adjusted when the vehicle is stationary. The STIS is based on a permanently fixed quick coupling system; it is connected with the vehicle’s pneumatic brake system or with one of our powerful AIR SUPPLY compressor systems so the tire pressure can be adjusted anytime and anywhere.

The user can adjust any required pressure (STIS stageless) or alternatively select between up to 8 preset tire pressures (STIS preset 4|2).

The purely pneumatic control unit guarantees trouble-free operation even in the harshest conditions.

After connecting the spiral hoses, the system operates autonomously, without the need for the driver to monitor the process. The system automatically cuts out when the correct pressure is reached.

Leading manufacturers such as Mercedes Benz and MAN have been offering the STIS factory-fitted in their new vehicles for many years now. Retrofitting is simple and can be done by any workshop or by the buyer himself.

The STIS works fast, is precise and easy to handle.

The STIS offers distinct advantages:

  • Precise tire pressure adjustment when vehicle is stationary
  • Fast and easy to operate
  • Simultaneous pressure adjustment of all tires in no time
  • Nearly no maintenance required
  • Easy to retrofit
  • Low cost

The STIS can be fitted on:

  • Trucks 4×4 | 6×6 | 8×8 (single|twin tires)
  • ATVs | SUVs | Off-road vehicles | 4×4|6×6
  • Any type of trailer tire valve!

Our patented tire valve makes it quick and easy to adjust the tire pressure of your vehicle using our tire inflation systems. With a greater section width, the tire can be inflated and deflated up to 8 times faster. Easy to use thanks to quick coupling system!

All tires simultaneously!

Adjust the pressure in connected tires—all at once! Simultaneous pressure adjustment significantly reduces the inflation and deflation time. Optionally, the system allows different pressure settings for front and back axles.

Purely pneumatic!

ti.system tire inflation systems are purely pneumatic units with no electric or electronic components. As well as making them hard-wearing, they therefore require virtually no maintenance. What’s more, vehicles are easy to retrofit at affordable cost, without having to go through electromagnetic compatibility testing all over again.

STIS | control units

We offer different kinds of control units and operating units for adjusting the tire pressure. All of our boxes are manufactured using high-quality 3mm sheet steel and coated in colour shade RAL 7021 KTL*. Hence, the inner components are optimally protected from mediums entering as well as from weather conditions.

We differentiate between control units and operating units. The control units include control dials, manometers damped with silicone oil as well as a main regulation valve. In contrast, when talking about our operating unit, the main regulation valve is installed externally as a main regulation unit. The naming of the different systems results from their unique mode of operation as shown below.

*cataphoretic painting

Stageless Units

Such a system allows the user to select one tire pressure value which is then adjusted in all connected tires simultaneously.

STIS stageless 1|1

The STIS stageless 1|1 allows simultaneous inflation or deflation of tires within a range of 0–10 bar using a rotary knob. A control unit simultaneously adjusts all connected tires to the required pressure, with the system automatically cutting out when the correct pressure is reached. The gauge always shows the current pressure of the connected tires.

• Dimensions: 15 cm | 12 cm | 30 cm (width | height | length)

• Weight: 5.5 kg

STIS stageless c 1|1

The STIS stageless c 1|1 is identical to the STIS stageless 1|1 in all aspects except size. More compact in design, the control unit of this unit is ideal for smaller vehicles with limited space.

• Dimensions: 10 cm | 8 cm | 7 cm (width | height | length)

• Weight: 1.1 kg

STIS stageless 1|2

Specially designed for trailers, this unit allows for precise pressure adjustment, and with a second control system significantly reduces the deflation time.

Stageless G

STIS stageless G

STIS stageless G for Mercedes Benz G + AIR SUPPLY K120

We offer an innovative solution specially designed for the Mercedes G model.

Our AIR SUPPLY K120 finds room under the driver’s seat which is exceptionally space-saving. The operational controls in the form of a control dial, an ON/OFF switch for the compressor as well as a pressure gauge are integrated into the original flap of MB belonging to the seat console. Thus, the system is perfectly incorporated into the vehicle’s interieur and blends in seamlessly.

Preset Units

With this kind of system the user can select two different tire pressure values for the front- and rear axle(s) simultaneously, selecting one out of four preset pressures per regulator circuit.

STIS preset c 4|1

This system enables the user to preset four tire pressures. Using a rotary switch, the required setting can then be conveniently selected to automatically adjust the pressure in all connected tires at the same time.

• Dimensions: 15 cm | 9 cm | 8 cm (width | height | length)

• Weight: 1.5 kg

STIS preset 4|2

With up to eight preset tire pressures, this system allows different pressure settings by axle. Simply select the appropriate settings to simultaneously adjust the pressure in the front and the rear axle tires as required.

• Dimensions: 30 cm | 12cm | 15 cm (width | height | length)

• Weight: 6.0 kg

STIS | hose depots

Our hose depots come in two different sizes: 75mm and 125mm. The depot tubes and stamped caps are manufactured using high-grade, weather-proof and UV-resistant plastics. The smaller depots are fitted with either steel cables and steel carabiners or with an elastic cord and plastic carabiners. The choice of materials used significantly accounts for the longevity and robustness of our depots.

Moreover, we use high-grade spiral hoses made of polyamide. This allows for long lasting operation without losing elasticity and internal stress. Depending on the vehicle different extension lengths of the spiral hoses are available. The spiral hoses are equipped with custom built plug-in couplings which allow for simple connection to our patented tire valve. The couplings are available in different sizes, depending on depot and tire size.

hose depot NG75

STIS hose depot NG75

The hose depots having a diameter of 75mm are available in two different lengths and different hose extension lengths, accordingly.

All depots of this size are equipped with size K21 plug-in couplings.

Depot length:           265mm |  290mm | 350mm

Extension length: 1500mm | 1900mm | 2500mm

hose depot NG125

STIS hose depot NG125

The hose depots with a diameter of 125mm are available in two different lengths and different hose extension lengths, accordingly. The NG125 depots are equipped with plug-in couplings of size K26.

Depot length:           335mm | 420mm

Extension length: 2500mm | 3500mm | tire valves

Our patented screw-on tire valves can be installed onto any generic tire valve size. Thanks to the substantially bigger airflow rate, the tire pressure can be adjusted up to 8 times faster compared to using conventional tire valves.

The valves come together with seal kits consisting of groove nuts and O-rings. Additionally, protection caps are included, which protect the tire valve from dust and dirt, as well as a gas station adapter that can be used for a tire change, for example.

The tire valves are available in two different sizes suitable for our different hose depots and couplings.

for hose depot NG75

Tire valves S21 for hose depot NG75

The tire valves size S21 are available with 3 different connection threads.

Vg8 | stainless steel
Vg12 | nickel-plated brass
¼″ NPT | nickel-plated brass

for hose depot NG125

Tire valves S26 for hose depot NG125

The tire valves size S26 are available with 3 different connection threads as well.

Vg8 | nickel-plated brass
Vg12 | nickel-plated brass
M15x1 | nickel-plated brass

STIS | media

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