ZRZ

Airtight opposed-action volume control louvre

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ZRZ

Description

The airtight volume control louvre is used in air conditioning systems for air flow adjustment and control of pressure in rectangular ducts and air handling units. They are installed as independent devices or in combination with protection or overpressure louvres

Construction

  • airtight construction (air leakage flow complies with Class II, VDI 3803 or DIN 24194, part 2)
  • supporting frame
  • horizontal movable blades controlled by PVC mechanism
  • bracket for handle or actuator

Material

    Material options for frame:

  • galvanized sheet metal
  • aluminium sheet metal
  • stainless steel sheet metal AISI 304

    • Blades: aluminium profiles

Actuator

Manual (C)

Manual adjustment with handle

Electric actuator (E)

Prepared for Belimo actuator installation. Upon request the actuator can also be installed on the diffuser housing.

Actuator options:

  • LM230A (ON - OFF)
  • LM24A (ON - OFF)
  • LM230A SR
  • LM24A SR
  • NM230A (ON - OFF)
  • NM24A (ON - OFF)
  • NM230A SR
  • NM24A SR
  • SM230A (ON - OFF)
  • SM24A (ON - OFF)
  • SM230A SR
  • SM24A SR

Installation

With flange on the duct.

Dimensions

ZRZ louvres are available in any combination of heights up to 2000 mm and widths up to 1200 mm.

Sound power level and pressure drop

Blade angle (°) Velocity (m/s) 1 m/s 2 m/s 3 m/s 4 m/s 5 m/s 7 m/s 10 m/s
10° ∆pt (Pa) 5 9 19
LwA0 (dB) 48 56 66
20° ∆pt (Pa) 7 12 18 34 70
LwA0 (dB) 42 48 54 63 71
30° ∆pt (Pa) 9 23 41 65 125 250
LwA0 (dB) 40 51 57 63 71 78
40° ∆pt (Pa) 29 68 105 185 340 720
LwA0 (dB) 49 60 67 73 81 89
50° ∆pt (Pa) 21 84 190 310 520 990
LwA0 (dB) 43 61 71 77 83 91
60° ∆pt (Pa) 62 260 580 1045
LwA0 (dB) 54 72 82 89
70° ∆pt (Pa) 310 1310
LwA0 (dB) 72 89
80° ∆pt (Pa) 1480
LwA0 (dB) 88

LwA (dB) = LwA0 (dB) + K

Sound power level correction factors K

A (m²) 0.1 0.12 0.25 0.3 0.4 0.5 0.6 0.75 1 1.25 1.6 2 3
K -10 -9 -6 -5 -4 -3 -2 -1 0 1 2 3 5

Application range for actuators

H/B 200 300 400 500 600 700 800 900 1000 1100 1200
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
LM-series actuator
NM-series actuator
SM-series actuator

Product Code

ZRZ Product
600 Width
x -
500 Height
ZN Material
E+LM230A Actuator

Width

Louvre width in mm

Standard 200-1200 mm

Optional: any dimension

Height

Louvre height in mm

Standard 200-2000 mm

Optional: any dimension

Material

Options:
  • ZN – galvanized sheet metal
  • AL – aluminum sheet metal
  • INOX – stainless steel sheet metal AISI 304

Actuator

Options:
  • R – central manual blade position adjustment
  • E – ready for actuator
  • E + code – installed actuator