Lock parts for PSK sliding doors – correct identification and use for indoor and outdoor operation
PSK sliding doors use a technical locking system in which the lock part is mounted in the sliding door itself. This lock part forms an essential component of the locking and works together with the PSK locking mechanism. Many of these lock parts come from Gretch Unitas, a leading maker of PSK fittings.
In this blog we explain what a PSK lock part is, where it is mounted, how to recognize the correct type, which codes are common, and what to watch for with indoor and outdoor operation.
What is a lock part in a PSK sliding door
A lock part in a PSK sliding door is the component that is mounted in the sliding door itself and into which the locking cams or pins of the PSK locking system engage. The lock part is thus part of the moving door section and not of the frame.
A correct lock part ensures that the door locks reliably when closed. If the lock part does not match the locking system or the door height, the door may close but not lock properly, or operate heavily and unreliably.
Common codes for PSK lock parts
Specific codes occur very frequently with PSK lock parts. These codes determine the application and must exactly match the existing situation in the sliding door.
Common codes are:
FFH1871-2120 GR.06
FFH 2121-2370 GR.07
These codes indicate the FFH range, that is, the functional wing height for which the lock part is suitable. The correct FFH range is essential for the proper functioning of the PSK locking system. A lock part outside the correct FFH range can be mounted but will not function technically correctly.
These codes are especially important when searching for the correct PSK lock part and therefore play a key role in findability.
Use for indoor and outdoor operation
PSK lock parts are used in sliding doors with indoor operation only and in sliding doors with indoor and outdoor operation. The lock part itself is suitable for both uses, provided the correct type and FFH range are chosen.
For outdoor operation, a correct choice is especially important because the closing pressure, operation, and safety fully depend on the right combination of lock part and PSK locking system.
Standard stock in backset 30 mm and 40 mm
PSK lock parts are available in different backsets. The most common backsets are 30 mm and 40 mm. The backset determines the distance between the faceplate and the center of the lock mechanism and must exactly match the existing fitting in the sliding door.
At Van Doorn Opening Techniques, PSK lock parts are standard in stock in backsets 30 mm and 40 mm, allowing fast delivery within Europe.
Correct identification prevents installation problems
Although a PSK lock part is relatively compact, it is technically closely linked to the entire locking system of the sliding door. A correct choice depends on the FFH range, the operation, the backset, and the type of PSK fitting.
By checking the correct code beforehand and not guessing, you avoid poorly closing doors, unreliable locking, and unnecessary disassembly.
Specialist supply and advice in Europe
Van Doorn Opening Techniques is a specialist dealer of PSK parts, including lock parts from Gretch Unitas. Through technical knowledge and experience with PSK systems, support is provided to fitters and companies throughout Europe in correctly selecting and replacing PSK lock parts.
