DataSheet TUNE R201711 en GB
Air Volume Controllers
 | 
1 / 2
Tune-R
Tight round damper
Description 
Tune-R is a control and shut off damper for round ducts. 
It is available in various versions with blade tightness 
class 1 or 4 and casing tightness class A or C tested 
according to EN 1751. A1 version is ideal in simple 
installations for regulating the air volume in circular 
ducts. C1 version is required for duct installation  
with airtight requirements towards the outside  
of the duct or to minimize the leakage towards 
Ordering codes
TUNE-R - 
Size
80 - 710 mm
Tightness class
1
2
3
A1
C1
C4
H
M0
M1
M2
M3
M4
M5
M6
handle
preparation for actuator
230V actuator
24V actuator
24V, 0-10V stepless actuator
230V spring actuator
24V spring actuator
24V, 0-10V stepless spring 
actuator
Version
Stainless steel
(Optional) 
A-304
A-316
for usage in the food industry
for general usage
Ordering code example:
TUNE-R-160-2-M3-A-304
Round Tune-R damper; size (diameter) 160 mm, tightness class C1, 24V 
stepless actuator with an analog control mechanism DC 0-10V, manufactu-
red from stainless steel A-304.
the outside surroundings (for example hospital patient 
rooms, industry applications, etc). C4 version is ideal 
for use as a shut off damper where different parts 
of the system need to be airtight separated from each 
other because of the dangerous materials contained 
in the air (surgery rooms). It can also be used as a shut 
off damper for air handling units, combined with a spring 
return actuator. In case of power outage the damper can 
maintain a fully closed position. The damper’s special 
structure enables external insulation up to 50 mm. 
The damper can be supplied in a manual or motorized 
version with an integrated position indicator. 
The maximum allowed temperature is 100°C.  
The maximum duct pressure is 1000 Pa. 
The basic version with a plastic manual controller and a 
low tightness class (A-casing, blade tightness class 0) is 
also available in a diameters from 100 to 315 mm, please 
see the Tune-R-B catalogue for details.
Design
The damper is manufactured from a galvanized 
steel sheet and is silicone-free. All the gaskets are 
manufactured from black rubber. Plastic bushings 
are from a PPO material. All the materials are ame 
retardant.


