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Series description

Fire door locks for tubular frame doors

Our fire door locks for tubular frame doors are specially designed to meet the high requirements for fire protection and escape safety. The compact dimensions, small backset sizes, and reversible latch enable flexible installation – both in new buildings and for retrofitting single- and double-leaf doors made of aluminium or steel.

With certified safety according to DIN 18251 and optional panic functions in accordance with EN 179 and EN 1125, the locks provide reliable functionality in hazardous situations. They can be combined with standard profile cylinders and fittings – a freewheel cylinder is not required.

Ideally suited for public buildings, administrative facilities, as well as commercial and residential construction – even where increased security is required.

BKS mortise lock fire protection for doors

Features

  • The compact design is ideal for narrow door profiles on aluminium and steel doors in fire protection applications

  • Small backset sizes from 25 mm allow flexible use in various profile systems – also for retrofitting

  • The reversible latch allows use for both DIN left and DIN right

  • The locks comply with DIN 18251 and additionally meet the requirements of EN 179 and EN 1125 for fire and emergency exit doors
  • Various versions offer features such as strike plate protection, top locking, or panic function for increased security

  • They can be combined with standard profile cylinders and door fittings – a freewheel cylinder is not necessary

  • Optionally, a silent latch ensures particularly quiet door closing
  • The mortise locks are durable, low-maintenance, and ideally suited for heavily frequented doors in fire and escape routes

Key advantages in detail

Fire door locks: The right choice – not only in terms of security

Fire door locks combine reliable locking technology with certified safety according to DIN 18251 as well as EN 179 and EN 1125. They meet the highest requirements for fire protection and escape safety – ideal for doors in public buildings, administrative facilities, or commercial construction. With versions featuring panic function, silent latch, or top locking, the locks can be flexibly adapted to the respective security concept – for maximum protection in case of emergency.

pictogram GU system folders

Reliability

The robust mechanics of the fire door locks ensure permanently reliable operation even under high thermal and mechanical stress – ideal for demanding applications in fire and smoke protection doors.

pictogram flexibility

Versatility

Whether panic function, strike plate protection, or top locking – fire door locks can be flexibly adapted to different door systems and security requirements.

safety pictogram

Security

Certified versions according to EN 179 and EN 1125 meet all relevant standards for escape and rescue routes and provide reliable protection in an emergency – tested for use in fire doors.

Specifications at a glance

Technical data & standards

Products Type of lock Usable in Panic function Secured latch hold Type Note
1-leaf 2-leaf
Mortise locks
Series 18
(manual
locking)
Fire
door locks
x - - Optional Optional B-1828 Strike plate protection
optional
x - x Optional Optional B-1838
x - x Optional Optional B-1839

Standards and security requirements

Mortise locks meet the highest security standards and are certified according to DIN EN 12209 for mechanical locks. Versions with panic function also comply with the European standards DIN EN 179 (emergency exits) and DIN EN 1125 (panic doors). VdS approval certifies their suitability for burglar-resistant doors in accordance with DIN EN 1627–1630. In addition, numerous models offer fire and smoke protection suitability as well as CE marking for use in the European market.

pictogram for fire and smoke protection
Pictogram for EN standard EN 12209
Pictogram for VdS classification VdS general
Pictogram for RC classification RC general

Downloads

Download catalogues and brochures free of charge here:

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