Home > Companies > Dortek Ltd > Dortek Fire Resistant Transfer Hatch

Stainless steel fire resistant transfer hatch designed to provide a safe and easy way to transfer products or materials between clean rooms and adjacent non-sterile areas. The hatch has mechanically interlocked doors to prevent depressurization and minimize the risk of contamination.

The doors are deliberately not sealed in order to allow a small volume of air from the clean side (which is normally at a higher pressure) to continuously flush the interior of the hatch. This volume is so small by comparison with room air flows, that it will have no perceptible effect on room pressures.


  • Stainless steel construction.
  • Stainless steel framed Pyran S or Pyrobelite glass doors.
  • Mechanically interlocked doors.
  • Fitted with intumescent sealants around the door.
  • Easy clean surfaces.
  • Fire resistant up to 60 minutes.


  • Pharmaceutical.
  • Research Laboratories.
  • Life sciences.
  • Healthcare.

Related literature

The following content references this product:

Standard product features


240 grit.

Panels and architraves:

  • Inner panels and outer body: 1.5 mm thick stainless steel.
  • Fixed flange: 2 mm thick stainless steel.

Door frame:

1.5 mm thick stainless steel.


One stainless steel clamp handle per door.


Stainless steel surface mounted hinges.

Wall seal:

Mastic bead from the architrave to the wall finish on both sides of the vision panel.

Door seal:

Silicone seal with vulcanized corners, mechanically fixed to the hatch body. Fitted with intumescent seal to perimeter at door frame.



Special size orders available, consult manufacturer.

Vision panels:

Hatches are manufactured using certified fireproof materials but have not been officially tested.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-25-28/424 Wall hatches

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Dortek Ltd


+44 (0)1482 226848

Product reference

Dortek Fire Resistant Transfer Hatch

Size (w x h x d - Internal)

[300 x 300 x 300 mm]
[450 x 450 x 450 mm]
[600 x 600 x 600 mm]

Hatch panels and architraves finish

[Stainless steel, grade 304]
[Stainless steel, grade 316]

Vision panel

[Clamped Pyran S glass F60]
[Pyrobelite glass F30]

Manufacturer details

St Mark Street,
East Yorkshire, HU8 7ED
Tel +44 (0)1482 226848
Fax +44 (0)1482 226843
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