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.Unidirectional instantaneous safety gear
SGA 88735 / HKD 503-D
- Working in downward direction
- Designed for low and mid-range loads
- Suitable for rail head width from 8 to 19 mm
- Various connecting points (top or bottom) for actuating mechanism are available
Technical Features
| TYPE |
SGA 88735
|
HKD 503-D
|
|
|
Max. rated speed (car) v, m/s
|
0,63
|
0,63
|
|
|
Max. rated speed (counterweight) v, m/s
|
1,00
|
1,00
|
|
|
Max. tripping speed (car) v1, m/s
|
1,00
|
1,00
|
|
|
Max. tripping speed (counterweight) v1, m/s
|
1,65
|
1,65
|
|
|
Max. total mass to be gripped (P+Q):
|
Rail width K=8-9 mm
|
Rail width K=16 mm
|
Rail width K=16-19 mm
|
|
- Tripping speed Vmax (m/s) 0,50
|
2509 kg
|
3555 kg
|
7736 kg
|
|
- Tripping speed Vmax (m/s) 0,60
|
2414 kg
|
3421 kg
|
7443 kg
|
|
- Tripping speed Vmax (m/s) 0,70
|
2311 kg
|
3274 kg
|
7125 kg
|
|
- Tripping speed Vmax (m/s) 0,80
|
2202 kg
|
3120 kg
|
6790 kg
|
|
- Tripping speed Vmax (m/s) 0,90
|
2091 kg
|
2963 kg
|
6446 kg
|
|
- Tripping speed Vmax (m/s) 1,00
|
1979 kg
|
2804 kg
|
6101 kg
|
|
- Tripping speed Vmax (m/s) 1,10
|
1868 kg
|
2647 kg
|
5761 kg
|
|
- Tripping speed Vmax (m/s) 1,20
|
1761 kg
|
2495 kg
|
5429 kg
|
|
- Tripping speed Vmax (m/s) 1,32
|
1638 kg
|
2320 kg
|
5049 kg
|
|
- Tripping speed Vmax (m/s) 1,65
|
1333 kg
|
1889 kg
|
4110 kg
|
|
Approved according to
|
European Lift Directive 95/16/EC
|
European Lift Directive 95/16/EC
|
|
|
Applicable standards
|
European Standard EN81
|
European Standard EN81
|
|
Subject to change without notice
Contact
Martin Tang,
Key account manager for KONE
Lucifer Li,
Key account manager for Schindler
Jeff Bian,
Key account manager for OTIS
Contact
