RMC - Air flow Management

CAV damper

Mechanical CAV damper with self-balancing operation. factory-set airflow option. Pressure independant function.

• Constant airflow damper without external power supply, self-balancing operation
• Effective commissioning
• Large operation area, pressure range of 50...600 Pa and optionally up to 1000 Pa
• Galvanized steel design

PRODUCT MODELS

• Models with and without insulated casing

The constant airflow damper shall operate without an electric or pneumatic external power supply.
The damper casing shall be made of galvanised steel and the blade of aluminium.
The damper shall operate with an adjustable spring.
Dampers shall be factory-set to the required airflow rate.
The damper with a manual adjustment device shall be able to be easily set or reset on the work site, during commissioning.
The damper casing shall be insulated with mineral wool as sound and heat insulation material (optional).

Introduction

RMC

CAV damper

  • Constant airflow damper without external power supply, self-balancing operation
  • Effective commissioning
  • Large operation area, pressure range of 50...600 Pa and optionally up to 1000 Pa
  • Galvanized steel design

Product Models

  • Models with and without insulated casing

Dimensions


DIMENSIONS


RMC/N



RMC/I



NS  L  L1  ØD 
100  170 40 99
125  170 40 124
160  240 40 159
200  240 40 199
250  240 40 249
315  220 60 314
400  295 60 399


Material


MATERIAL AND FINISHING


PART  MATERIAL 
Housing Galvanised steel
Damper blade Aluminium
Damper blade bearings PTFE
Tube for the adjustment Plastic
Ring seals Rubber


Product models


PRODUCT MODELS

PRODUCT MODEL  CODE  DESCRIPTION 
Standard N No insulation
External insulation I Mineral wool, thickness 50 mm,
for sound insulation and reduction
of heat transfer


Function


FUNCTION




Constant airflow damper RMC is an independent control element operating without an external power supply, maintaining the required airflow rate regardless of upstream pressure changes. Consequently, system balancing is not needed.

As the dynamic pressure in the duct branch increases, the damper turns, thus increasing the pressure loss and preventing an excessive increase in the airflow rate. Similarly, as the dynamic pressure decreases, the spring returns the blade to the open position, reducing the pressure loss and thus maintaining a constant airflow rate.

The constant airflow damper includes a damper blade, supported by bearings and connected to an adjustment spring. As a result of the balance between aerodynamic forces and the spring effect, the necessary throttling effect is achieved and the set airflow rate is achieved.

Operation range

The constant airflow damper operates from a minimum pressure difference over the unit, which depends on the air velocity (see diagram below) to a maximum pressure difference of 1000 Pa.

For example, if air velocity in duct is 7 m/s, the unit pressure loss is approximately 100 Pa or above.



SIZE  qv
min.
 
qv
max
 
qv
min.
 
qv
max
 
v
min.
 
v
max
 
dPst
min.*
 
dPs
max
 
mm  m³/h m³/h l/s l/s m/s m/s Pa Pa
100  70 220 19 61 2.5 7.8 50 1000
125  100 280 28 78 2.3 6.3 50 1000
160  180 500 50 139 2.5 6.9 50 1000
200  250 900 69 250 2.2 8.0 50 1000
250  500 1500 139 417 2.8 8.5 50 1000
315  800 2200 222 611 2.8 7.8 50 1000
400  1000 3800 278 1250 2.2 8.4 50 1000


Control inaccuracy less than 20%.

Installation


INSTALLATION


Safety distances for the damper

The airflow control damper should be installed in undisturbed airflow. The airflow velocity profile in the duct should be sufficiently even, without disturbances caused by bends, T-branches etc.

The necessary safety distance after a bend or a T-branch is 3 x the duct diameter.

The airflow control damper should be installed so that the arrow on the damper corresponds to the direction of the airflow. See the installation examples below.



Specification


SUGGESTED SPECIFICATIONS


The constant airflow damper shall operate without an electric or pneumatic external power supply.
The damper casing shall be made of galvanised steel and the blade of aluminium.
The damper shall operate with an adjustable spring.
Dampers shall be factory-set to the required airflow rate.
The damper with a manual adjustment device shall be able to be easily set or reset on the work site, during commissioning.
The damper casing shall be insulated with mineral wool as sound and heat insulation material (optional).

Product Code


PRODUCT CODE


RMC/S-D

   S = Model
    N  Standard
    I  Insulated (casing 50 mm)

   D = Connection size
    100, 125, 160, 200, 250, 315, 400


Code example

   RMC/N-100

References stored

References stored

20000733 RMC/A-100
20000734 RMC/A-160
20000744 RMC/A-125
20000745 RMC/A-200
20000746 RMC/A-250
20000747 RMC/A-315
20000748 RMC/A-400

Downloads & Media

Halton RMC - fi
Type
Datasheet
Taal
Fins (Finland)
Grote
840,7 kB
Halton RMC - se
Type
Datasheet
Taal
Zweeds (Zweden)
Grote
842,5 kB
Halton RMC - it
Type
Datasheet
Taal
Italiaans (Italië)
Grote
842,0 kB
Halton RMC - nl
Type
Datasheet
Taal
Nederlands (Nederland)
Grote
842,7 kB
Halton RMC - ru
Type
Datasheet
Taal
Russisch (Rusland)
Grote
1,2 MB
Halton RMC - fr
Type
Datasheet
Taal
Frans (Frankrijk)
Grote
734,5 kB
Halton RMC - uk
Type
Datasheet
Taal
Engels (Verenigd Koninkrijk)
Grote
841,4 kB