No time can be lost when the call to action comes in

This also applies to the folding doors that open the door to the outside in many fire stations. They must open at the push of a button – and mechanically, so that even in the event of a power failure, they do not hinder deployment.

It is important that the leaves are slowed down just before they reach the open position so that they do not bang against each other without control. After all, they are supposed to do their job reliably for many years.

Variable speed gas springs combine the function of a gas spring with that of a hydraulic damper

The variable speed gas spring can do more than just a “normal” gas spring: it pushes the folding doors open in the same way as a gas spring. But the speed at which it pushes them open is adjustable, unlike a standard gas spring. This is possible thanks to a sophisticated system in which, with the help of two connected cylinders, the gas spring is coupled with a hydraulic damper.

Additional final damping protects door and thus saves costs

For folding doors, the variable speed gas spring offers another important feature: final damping. This additionally brakes the leaves before they reach the final position. This prevents the leaves from hitting each other violently, which can damage the door with the time.

Easy to retrofit

And the variable speed gas spring has another major advantage: it can also be retrofitted to existing folding doors without great effort if, for example, normal gas springs or complex drive solutions were previously used and need to be replaced. This is exactly what the Herrmann company has done for the fire department in Maikammer, Germany.

The folding gate is closed by hand with little effort after the vehicles left.