The sliding door lock developed by Willach Vitris is characterised by patent-pending design principles and the highest quality: all essential materials come from Europe and are assembled at Willach's headquarters in Germany.


The lock is suitable for both Portavant sliding doors and Atrivant patio glazing:

  • for single-sided Portavant systems in conjunction with a stop/locking box
  • for single-sided Atrivant systems in conjunction with wall profile and striking plate
  • for double-sided Portavant or Atrivant systems with matching counter box
  • and for other sliding doors

Coloured covers allow the lock to match the colour of your Portavant and Atrivant systems. The basic housing is always made of anodised aluminium. Use the sliding door lock with the handle insert or without, depending on your requirements.

Thanks to the usability of exchangeable cylinders, the lock can be easily integrated into your locking system and can therefore also be used with toilet rotary handle locks. It can also be combined with electronic locking systems, provided they have the dimensions of the authorised standard exchangeable cylinders.


In Atrivant systems with protruding locking cylinders, a stop buffer that can be placed on the exchangeable cylinder prevents damage to the glass of the neighbouring door leaf.
Intelligent design principles ensure a high level of burglary protection. The locking bolt cannot be manipulated from the outside when locked. Even when open, the locking bolt is firmly locked in place and therefore cannot be swivelled down unintentionally by shaking or pushing.

Thanks to the impressive lifting movement of the lock, a vertical overlap of up to 13 mm is achieved between the deadbolt and the strike plate.
Thanks to an intelligent design, the deadbolt can be adjusted to two different horizontal distances between the latch and the glass edge. The deadbolt has a deadbolt extension that can be removed if necessary. This makes the lock flexible to use.


With Portavant, the lock is used with a lock bolt extension (10 mm distance between lock bolt and glass edge). When used with Atrivant, the lock bolt extension must be removed (17 mm gap).

The lock is suitable for glass thicknesses of 8 / 8.76 / 10 / 10.76 / 12 / 12.76 mm. The set includes interchangeable glass inserts to adapt to different glass thicknesses. The lock is always mounted symmetrically on the pane and the locking bolt swings out symmetrically to the centre plane of the glass pane. The sturdy stainless steel locking bolt is only 4 mm thick and therefore fits into many installation situations, while a clever glass cut-out and excellent clamping on the glass prevent the lock from being pulled out of the glass cut-out from the side.


In conjunction with the Atrivant wall profile, the lock is set back from the edge of the glass so that the pane can sink deep into the wall profile, thus reducing draughts. A customised glass cut-out is therefore used with Atrivant in conjunction with the wall profile.

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