Porthole Installation Guide D:
With screw fastening through the door leaf

This guide describes the installation of portholes and vision panels with screw fastening through the door leaf. This version is suitable for frames made of aluminium or stainless steel L-profile.

In this version, the two rings are screwed centrally to the door leaf. The key factors are precise alignment of the rings, a glass pane inserted without tension, clean determination of the gap clearance and even insertion of the glazing wedge gaskets.
What matters during installation

Installation diagram explained interactively

The numbers in the technical drawing correspond to the installation steps. Click or touch a point to jump directly to the relevant step.
Tip for touch devices: Tap a point for details • press and hold to jump

Technical drawing for the installation guide for portholes and vision panels Version D

Installation in six clear steps

From the central screw fastening of the first ring to the finished glazing: the following steps guide you safely through the installation of Version D.

01

Screw the first ring to the door leaf

Position one of the two rings centrally on one side of the cut-out and screw it to the door leaf.

Important: The ring must sit centrally and lie cleanly against the door leaf. Precise alignment in this step forms the basis for the later glass position and the fit of the second ring.
02

Insert the glass pane centrally on the opposite side

Insert the glass pane centrally on the opposite side and loosely clamp it with three to four small wooden blocks. The blocks are secured with silicone to prevent them from slipping.

Recommended dimensions for the spacer blocks:

  • Width: 10 to 15 mm
  • Length: according to the leaf thickness
  • Height: approximately half the clearance between glass and cut-out
Installation goal: The glass pane should be held centrally and loosely. It must not be under tension, so that the later glazing sits cleanly and with minimal stress.
03

Screw the second ring to the door leaf

Also position the second ring, the glazing frame, centrally and screw it to the door leaf.

Practical tip: Before final tightening, check whether both rings are aligned with each other and the glass pane is still positioned centrally.
04

Determine the gap clearance for the glazing gasket

Determine half the distance between the glazing frame and the glass pane as the gap clearance for the glazing gasket. Then insert this half dimension on one side between the glass pane and the mounting frame.

Suitable glazing spacer blocks:

  • Red: 2 mm
  • Green: 3 mm
  • Yellow: 4 mm
  • Blue: 5 mm
Professional point: The gap clearance should be determined carefully. An even dimension makes it easier to insert the wedge gasket later and improves the fit of the glazing.
05

Insert the glazing wedge gasket on the opposite side

Insert the supplied glazing wedge gasket on the opposite side between the glass pane and the glazing frame.

Clean execution: The wedge gasket should sit evenly and must not be twisted, squeezed or overstretched in sections.
06

Insert the wedge gasket on the mounting frame and remove spacer blocks

Now insert the glazing wedge gasket between the glass pane and the mounting frame. The glazing spacer blocks inserted earlier in step 4 are removed again during this process.

Final check: After removing the spacer blocks, the glass pane should sit securely, centrally and without visible stress in the frame.

The result

When installed correctly, the result is a cleanly framed vision panel with a centrally positioned glass pane, even glazing and screw fastening through the door leaf as a robust version directly connected to the door leaf.

Further technical information

Back to the porthole overview, to the glazing options or to the price inquiry for portholes.

Gesco metall Biegetechnik

Precision in Perfection

GESCO-metall GmbH
Bellstr. 3a
D-92421 Schwandorf
Phone: +49 9431 74 63 – 0
Fax: +49 9431 74 63 – 20
Mail: info@gesco-biegetechnik.de

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