Since 1977 Wittur supplies the lift industry with versatile and high-quality doors.
Since 1977 Wittur has been providing the lift industry with versatile and high-quality doors. More than 30 years later Wittur is the leading company in the lift doors segment, with state-of-the-art technical solutions and unparalleled product range. Regardless of whatever your lift requires - a round door with panoramic panels rather than a straight or a folding one - Wittur can supply the best solution for your needs.
Research for innovative solutions and rigid control of product quality are key features of Wittur Safeties. 
Wittur offers a wide range of car and counterweight frames. Modularly conceived, these components are very flexible in terms of rated load, height and width. The wide range of accessories includes safety gears, suspension pulleys, compensation chain and travelling cable hangers, allowing configurations suitable for different shaft layouts, lift designs and rated speeds. Wittur can also supply special frames for tailored projects.
Research for innovative solutions and rigid product quality control are key features of Wittur Safeties.
According to EN81-1/2 A3 and EN81-21 A1 (new lifts in existing buildings), new lifts installed after January 1st 2012 must be equipped with a system to prevent a car moving away from the floor with the landing door not in the locked position and the car door not in the closed position.
Since 1977 Wittur supplies the lift industry with versatile and high-quality doors..jpg)
Since 1977 Wittur supplies the lift industry with versatile and high-quality doors.
Since 1977 Wittur supplies the lift industry with versatile and high-quality doors.
GLSG-22U is a progressive safety gear with mechanical and electrical components. Mechanical components are consisting of a combination of disk springs, braking elements and trigger mechanism with free movable roller.
The safety gear is activated by a compression spring; the electrical components are used to keep the safety gear in initial position.
The brake force is adjusted and sealed in the factory.
Highlights
- Uni-directional progressive type safety gear for lifts up to 2,0 m/s
- Application range: maximum 1850 kg load on safety, machined guide rails 9-16 mm oiled and dry condition
- No conventional overspeed governor system needed
- Fail safe design concept
- SIL3 safety release system required (IEC 61508 compliant)
- Electronical synchronization of left and right safety gear (simultaneous gripping)
- Very short reaction time of the magnet release system ensures highest safety (low tripping speed)
- Low release force from gripped situation
- Sufficient running clearance to avoid unintended gripping
- Versatile installation: can be installed either in a separate housing or on the vertical beam of the car sling
- Small overall dimensions
- Maintenance free operation
- Complete traceability of the production of main components from raw material to final product with coding system stamped to the parts to enhance safety standard
- Compliant with requirements of EN 81-20/50:2014
- EU type certified according to Lift Directive
- 100% tested and checked at factory
Features
| Guide rail condition | mass to be gripped (P+O) Fmax | max. nominal speed v |
max. tripping speed vmax |
| machined / dry | 560 - 1850 kg | 2 m/s | 2,63 m/s |
| machined / oiled | 570 - 1570 kg |
| power supply magnet | [V / A] | 24 V DC / 3,5 W |
| width of guid rail head | k [mm] | 9 / 10 / 15,88 / 16 mm |
| min. width of guide rail running surface | n [mm] | 25 |
| min. height of guide rail profil | h [mm] | 62 |
| temperature during operation | [°C] | -10 . +50°C |
| storage temperature | [°C] | -25 . 10°C |
| max. air humidity | 90% / +25°C 93% / +40°C |
|
| protection class | iP 2X |
Contact
Martin Tang,
Key account manager for KONE
Lucifer Li,
Key account manager for Schindler
Jeff Bian,
Key account manager for OTIS
Contact
