Pressure changesWhy are tunnels critical for windows?
When a train enters a tunnel or passes another train, the outside pressure changes abruptly. The pane has to take those load cycles millions of times without the seal giving way.
Typical application: Pressure-sealed vehicles, hinged windows with two sealing planes.
Service lifeHow long does a rail window have to last?
Rail vehicles run for decades. Windows, doors and seals are therefore designed not for a model year but for a fleet – including spare parts supply across the whole period of service.
Typical application: Fleets from Stadler, Siemens and the Berlin underground.
Bonding and weldingWhy are the joining processes certified?
Glazing is bonded and frames and doors are welded. Both are so-called special processes: you cannot tell from the finished component whether they were carried out correctly. Personnel and procedures are therefore externally certified – welding to DIN EN 15085-2 CL1, bonding to DIN EN 17460.
Typical application: All rail vehicle components.
System responsibilityWhat does Cleff supply for rail?
Driver's cab windows, side windows, hopper and sliding windows, entrance, machine room and maintenance doors and partitions – individually or as a complete system supply with casing, seals and fittings.
Typical application: Vario tram, FLIRT 3, Berlin underground, Siemens Vectron, Linsinger.