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Why AKO pinch valves?

Profit from the services of the world market leader

Railways & trains

Trains and railways are one of the most popular and most frequently used means of transport around the world. Whether for local public transport, long-distance journeys or transporting freight – railways are an important part of the transport infrastructure. Functioning valves installed to perform numerous tasks in various different areas are important to guarantee smooth processes in their relevant area of application.

Pinch valves from AKO are used in various sectors of the railway industry

Valves are installed to perform numerous tasks in the railway sector. They can be used to control the filling of wagons with bulk goods, for dosing and shutting off the transport of various different operating materials (e.g. water, sand, etc.) or to support the unloading process.

Steady increases in the number of passengers demonstrate the importance of the railways. If a passenger is asked about their wishes and requirements for a train journey, they will usually answer that they expect to be able to rely on the train to arrive punctually at their destination. However, comfort is also an important aspect that will leave passengers with a positive impression of the train journey.

While the train toilet is probably not the first thing that springs to mind and a functioning toilet is not considered something special from the passenger's point of view, it will quickly attract attention should it stop working. A reliable solution for train toilets – especially controlling the transport of grey & black water using valves – is thus an important issue for railway companies.

From vacuum toilets through to traction control – pinch valves are used for numerous applications on trains

Drop chutes were used for the disposal of faecal matter from train toilets for decades, which meant that the waste was deposited directly onto the tracks during travel. Increasing environmental awareness and ever faster trains – on which this type of disposal was no longer feasible for technical reasons – meant that self-contained systems are now used in modern train toilets to collect the faecal matter and grey water on the train.
The black water from the toilet is removed using a vacuum system. Pinch valves from AKO Armaturen control this process and are responsible for stopping and starting the suction.

Another application for pinch valves in the area of rail vehicles is the filling of so-called sand boxes. The sand is used to optimise the braking of the train and to increase traction e.g. on wet rails. The sand from the boxes – loaded beforehand using a filling process controlled via a pinch valve – is spread in front of the wheels on the engine with aid of compressed air or a drop chute. It increases the friction between the wheel and the rail and thus shortens the breaking distance and improves traction.

Pinch valves control the transport of sand for dispensing systems for trains & railways
Pinch valves control the filling of braking sand on trains
Pinch valves are used for the feed lines to vacuum toilets on trains
Pinch valves control the discharge from train toilets

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35 years as a family-run company

600 new customers each year

20 000 customers worldwide

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< 0.2% complaint rate

> 99% customer satisfaction

30 distributors worldwide

Widest pinch valve product range

10 000 pinch valve variants

2 500 variants available ex stock

100 000 units sold each year

Extensive service activities

80 CAD formats

32 assembly & animation videos

16 multilingual documentation