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.Overspeed Governor
OL35-NA, OL35E-NA
- Engagement of the safety gear in down direction
- Overspeed contact operated in up and down direction
- Outline dimensions do not change over whole speed range
- Tripping possible at any point along perimeter of governor pulley
- Guaranteed minimum rope pull through force 500N
- Pull through force created by inbuilt friction brake exerting brake torque to governor pulley
- Suitable for conventional elevators with machine room but also for MRL-elevators
- Wide range of options available as remote control, base plates, tension weights, providing maximum flexibility
- Meets code requirements of ASME A17.1
Technical features
|
Type (900540) |
|
|
OL35NA |
|
|
travel height (recommendation) |
max. |
TH |
75m |
|
|
Max. distance between overspeed governor and tension weight: |
80 m |
|||
|
Rated speed |
|
NS |
100 ft/min ... 500 ft/min |
|
|
Brake force of the governor |
|
|
168 lbf ± 56 lbf |
|
| Permissible tripping speed | max. | v1 | 676,5 ft/min | |
|
Tension force of the tension weight |
min. |
|
600 N |
|
|
Rope pulley diameter |
|
DB |
12” |
|
| Weight of OL | max. 25 kg | |||
|
Rope diameter |
d |
3/8 “ |
||
|
Tension force of the rope |
min. |
|
250 N |
|
|
Operating temperature |
|
|
-5°C ... +55°C |
|
|
Storage temperature |
|
|
-40°C ... +70°C |
|
|
Air humidity |
|
|
<98% / 40°C |
|
|
Protection classification |
|
|
IP2x |
|
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
