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.
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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.HYDRAULIC DEVICE AGAINST UNINTENDED CAR MOVEMENT
HDU Safety Device
TÜV NORD certified according to EN81-2:1998+A3:2009
Safety system against uncontrolled car movement away from the landing position for new and existing hydraulic lifts
HDU is available integrated and stand-alone unit
- Based on the concept of redundancy with valves operating in series
- Available in "kit modernization" for installation on existing valves, even different from Wittur
- Compact package; all current applications in cabinet are guaranteed
- Quick and easy; no additional operations by the installer required
Range of products
| Type | Flow Range (l/min) | Model |
Applications | ||||
|
HDU 035
|
8 - 45 | integrated stand-alone |
HC | ||||
|
HDU 210
|
55- 210 | integrated stand-alone |
HM HM - HI |
||||
|
HDU 380
|
250 - 380 | stand-alone | HM - HI | ||||
|
HDU 600
|
450 - 600 | stand-alone | HM - HI |
||||
| Type | Flow Range (l/min) | Model |
Applications | ||||
|
HDU-E 250 *
|
15 - 250 | stand-alone | HE | ||||
|
HDU-E 500*
|
150 - 500 | stand-alone | HE | ||||
|
HDU-E 1000*
|
250 - 1000 | stand-alone | HE | ||||
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Contact
Martin Tang,
Key account manager for KONE
Lucifer Li,
Key account manager for Schindler
Jeff Bian,
Key account manager for OTIS
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