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Constant Airflow Regulator MR
MR Mono - MR Modulo
INTRODUCTION
• Aeraulic disturbances within HVAC systems
generate airflow variations.
• Managing to set real airflows as per those
calculated in design stage, will ensure hygiene
(ventilation) and thermal comfort (air conditioning)
while limiting noise and optimizing fan or AHU
operating costs.
RANGE
2 models:
• MR Mono: 1 code = 1 factory-set airflow
• MR Modulo: 1 code = several airflow set point
(8 references).
7 diameters (mm): 80, 100, 125, 150, 160, 200 and 250.
3 Pressure ranges:
• between 50 and 250 Pa for the standard MR Mono
and the MR Modulo,
• between 150 and 650 Pa for the MR High Pressure,
• between 80 and 250 Pa for the MR Modulo VMT
(compliant with VMT technical approval).

PRINCIPLE OF OPERATION

• CARs (MR) purpose is airflow balancing in HVAC
ductwork.
• It can be easily inserted into a portion of a circular duct
network in order to regulate an accurate and constant
airflow within a large differential pressure range.
• The membrane inflates or deflates depending on the
pressure drop on both sides of the CAR, changing
consequently the free air passage (see illustration
below).
> This principle guarantees a constant airflow when the
upstream/downstream differential pressure varies.
0
CONSTRUCTION AND MATERIAL
Removable clips in PC / ABS plastic,
➀
Regulating silicon membrane,
➁
Double-lip airtightness seal in elastomer
➂
Housing in PC / ABS plastic,
➃
Rotating adjustment ring in PC / ABS plastic for
➄
airflow setting.
The following information is directly indicated on the
product:
• Flow direction, diameter in mm and inch, operating
differential pressure range, code, production
traceability,
• MR Mono: factory airflow calibration (both in m³/h)
and cfm),
• MR Modulo: airflow setting range correlation table
(both in m³/h and cfm).
2
DIMENSIONS - WEIGHT
MR Mono
MR Modulo
in mm
Duct Ø
ØN
ØB
80
76
85
100
92
105
125
116
132
15-95 m³/h
125
116
132
100-190 m³/h
150
147
153
250
160
153
167
200
190
210
250
238
262
MR Mono
4
3
Ø N
Ø B
Ø B
MR Mono
E
F
A
Weight
(kg)
14
3
53
0,06
14
4
61
0,10
14
4
61
0,14
14
4
97
0,20
14
4
103
0,30
14
4
103
0,30
20
7
130
0,60
20
5
159
1,06
MR Modulo
1
5
2
3
F
E
A
F
E
A
MR Modulo
F
A
Weight
(kg)
15
65
0,08
13
70
0,12
13
70
0,15
17
110
0,17
19
118
0,37
19
118
0,37
23
144
0,59
26
179
1,02
4
1
2