Tunnel Electro-Recess Closure Flush with the Adjacent Area

Fire-resistant inspection opening closure for road tunnels

Insulation of safety-related installations

Execution according to tunnel regulations


Standardized, fire-resistant maintenance door, flush with the adjacent areas for the separation of safety-related relevant electrical installations in Tunnel niche. This door is suitable for securing the maintenance of performance function of safety-related electrical wiring systems and distributors for the emergency lighting and smoke clearance system. Design according to Directive 2004/54/EG, RABT, ZTV-ING Part 5.

Door check for large door leaf


  • Fire resistance 90 minutes: fire-resistant
  • EI 90/F 90 classification
  • Smoke protection
  • Safety class I
  • Protection rating in accordance with IP 54
  • Stable against pressure / suction up to 1000 Pa


  • Single and double-leaf maintenance cover for flush installation in tunnel recess
  • Fastening laterally inside with cable tie mount
  • Door closes flush with frame
  • Door opening angle ca. 90°
  • Door hinges in stainless steel 1.4571
  • Turning lever in stainless steel 1.4571 prepared for DIN single cylinder
  • Fire barrier with circumferential fire, smoke and dust proof seals
  • Equipotential bonding
  • Integrated door check strap
  • With inductive proximity switch for door monitoring, 90° rotatable

Proximity switch, 90° rotatable


Material characteristic

  • Non-combustible board with surface coating, classification A2 – s1, d0
  • Outside surface in stainless steel 1.4571
  • Inside surface synthetic-coated
  • Cable tie mount in stainless steel 1.4529
  • Door hinges in stainless steel 1.4571
  • Turning lever in stainless steel 1.4571

Dimension drawing

Scope of delivery

  • Maintenance cover
  • Fastening material
  • Prepared for connection to equipotential bonding

Assembly details

Grounding of the Tunnel Electro-Recess Closure PRIODOOR ETX TUN – Flush installation (Standard version), Installation protrudes in case of a low recess depth

Installation in tunnelling wall

File name
Catalogue excerpt .pdf
Text for tender PRIODOOR ETX TUN .pdf


Lateral impact protection for front-panel mounting

  • Outside surface powdered according to RAL
  • Special sizes, special designs on request