Ever wondered about the jargon around door closers? We define some of the terms to ensure that you specify the right closer for your project.
Ever wondered about the jargon around door closers? We define some of the terms to ensure that you specify the right closer for your project.
- Backcheck: a closer may moderate the opening action to prevent damage to the door, closer or frame if the door slams open or is blown open.
- Closing Force: the power which the closer exerts on the door to close it. Usually measured in EN sizes from 1 to 7.
- Closing Speed: the speed at which the door closer allows the door leaf to close
- Door closer: a door closing mechanism where the energy for closing the door is generated by the user opening it, when released returning it to the closed position
- EN 1154: EN1634 – 1: Fire resistance and smoke control tests for door, shutter and, openable window assemblies and elements of building hardware.
- Floor Spring: A hydraulic unit fitted into the floor underneath the door at the hinge edge to close the door.
- Hold Open: a closer with an integral electro magnet allows a fire door to be held open for convenience. The magnet is linked into the fire alarm system and automatically releases the door when the fire alarm is activated.
- Latching action: a closer may accelerate closing during the final few degrees to allow the door to overcome the resistance of the latch, ensuring reliable closing.
- Non-handed: the closer can operate a door hinged on the right or left side
- Power Size: the power size of the closer used on the door depends on the width, height, weight and use of the door it is fitted to. This may be adjustable or fixed according to the closer type. It is important to fit the right closer considering door width and weight, air pressure, use and users.
Our UK-manufactured 4000 Series range includes three different power size closers, all with easily adjustable speed: the 4001, 4002, and the latest addition, the power size three 4003. An ultra-compact high efficiency design makes the Astra 4000 Series the perfect choice for both new-build and refurbishment projects. They are ideally suited to a wide variety of applications including hotel bedrooms, office doors, residential dwellings, student accommodation and any setting with a reduced ligature requirement.
The Astra 4000 series door control is the latest jamb mounted product on the market that is CE marked in accordance with the European Harmonised standard BS EN1154. The 4000 range of concealed door closers has been developed to meet standards, fire regulations, accessibility requirements and offers an attractive and cost-effective alternative to face fixed closers.