Operation and Maintenance Manual
– SCD Smoke Dampers
Version 1
Date 04 2018
Page 38 of 81
actuators with the following fastening:
•
bottom (PUxV, DUxV),
•
mid-level (PMxV, DMxV),
•
top (POxV, DOxV),
actuators with the following position lock:
•
advanced (PxAV, DxAV),
•
both outermost positions (PxDV, DxDV).
Basic features:
•
The piston actuator, single- or double-acting, with the body diameter of 32-63 mm,
the body made of anodised aluminium,
•
12, 16, 20 or 25 mm diameter piston rod, depending on the actuator size,
•
Eye bolt with M8 thread, gasket being also a wiper for the piston,
•
M8 x 40
– Ø8-Ø12 eye bolt holes, depending on the actuator size, recommended
operating pressure 6-10 bar,
•
Maximum static operating pressure 60 bar,
•
Theoretical lifting force, depending on size, at 6 bar pressure: 480-1870 N,
depending on the actuator size (when selecting, take into account approximately
15% loss due to friction),
•
Installation and gas inflow through rotatable screw couplers,
•
Ambient temperature range from -20 to +60
°C (within the range of VdS 2159
Certificate, for 2 hours, up to +110
°C),
•
Maximum locking force 6500 N,
•
Pneumatic actuators have internal mechanical bolt locking lug, which makes the
lock of the open position. When needed, it is possible to unlock the actuator
manually according to the instruction below.
Actuator unlocking:
Rys. 18. Releasing the actuator lock.
Before the damper closing it is necessary to release the gas from the pneumatic
system. For that purpose unscrew CO2 cylinders and unlock the actuators. Shifting the
pins manually by 4 mm in the direction of the arrow makes it possible to unlock the piston
rod and move it manually.
Once all the dampers are closed, check if they are locked. An unlocked damper may,
under the influence of wind, open uncontrollably. This fact may result in damaging the
damper or roofing.
