Damper ZDH

Bi-directional dampers for sliding lift doors

Characteristics

  • The DICTATOR sliding door dampers of the ZDH series are bi-directional hydraulic dampers for an impact speed up to 2.0 m/sec. A single damper will slow down and damp the door in the final stages. For this purpose the damper is fixed to the door and corresponding limit stops have to be provided in the respective open and closed position.
  • All DICTATOR dampers of the ZDH series are adjustable. This allows the door to be adjusted to an optimum function.
  • Depending on the requirements we offer different ZDH types: with automatically extending piston rods, with the piston rods pushing/extending one another or with one piston rod extending automatically and one being pushed by the other.

Product details

Technical data

Diameter piston rod8,5
Diameter cylinder28; 35
Materialsteel zinc-plated

Dimensions

All dimensions in mm

* height of the buffer with stepped adjustment: 25 mm
** height of the buffer with adjustment screw: 15 mm

TypeMeasure AMeasure BMeasure CMeasure DAdjustmentMake of liftPart No.
ZDH 50/50 BG5013729728screw adjustment-210110
ZDH 50/50 a5013729728screw adjustment-210000
ZDH 50/50 a/EG/P5022040028stepped adjustmentRathgeber203190
ZDH 60/80 a60/8026048428stepped adjustment210420*
ZDH 70/70 a/EG/P7026048028stepped adjustmentRathgeber203191
ZDH 55/55 BG5513225533stepped adjustmentRathgeber203195**
ZDH 120 BG12020840828stepped adjustmentStahl, width up to1300 m203162***

*: On the side with the 60 mm piston rod, the length of the thread is 44 mm
**: Ø 12 mm piston rod, M 24 x 1 mm thread on one side, 17 mm long
***: with relief groove

Key:
a: automatically extending piston rod
a/EG: one piston rod extending automatically, one piston rod pushed outwards by the other
BG: piston rods move each other to the outside
P: progressive damping

Installation

Installation notes

The bi-directional ZDH dampers are mounted on the cabin door. They dampen the door in the final open position as well as in the final closed position. This requires a mechanical limit stop for the damper in both positions.

The damping force can continuously be adjusted to the requirements on site. Both piston rods are adjusted separately.

Dampers with stepped adjustment (ZR):
Pull out the piston rod completely and the turn it while still pulling.

Dampers with adjustment screw (NR):
Here the damping force is adjusted by an adjusting screw in front of the piston rod. It is accessible through a boring in the buffer.

Order information

Order Information

DescriptionPart No.
Final damper ZDH 120/120 bg, Ø 28, stepped adjustment, with pressure relief groove203162
Final damper ZDH 55/55 bg, Ø 28, stepped adjustment203195
Final damper ZDH 70/70 aeg p, Ø 28, stepped adjustment203191
Final damper ZDH 60/80 a, Ø 28, stepped adjustment, ABS210420
Final damper ZDH 50/50 aeg p, Ø 28, stepped adjustment203190
Final damper ZDH 50/50 a, Ø 28, screw adjustment210000
Final damper ZDH 50/50 bg, Ø 28, screw adjustment210110

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