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VWR-3A (RAL9016) • Square adjustable swirl diffusers

Square swirl ceiling diffusers with adjustable blades

Brand

  • Cairox

Application

  • For air supply and exhaust in ventilation and air conditioning systems.

Material

  • Galvanised steel

Colour

  • Standard colour white, RAL 9016 with black blades

Composition

  • Square swirl ceiling diffuser made of galvanised steel. The radial blades are individually adjustable and are developed for optimal diffusion, ensuring an instant mixture of primary and secondary air. Types 400/16, 500/16, and 600/16 have 16 blades, the 600/24 model has 24 blades
  • The first number (f.e. 400) represents the dimensions of the panel

Mounting

  • Diffuser to be centrally mounted with conceiled M6 screw on the crossbar of a plenum box
  • Black blades to be set to position (see drawing).
  • Horizontal placement of blades for heating mode only
  • All blades to be set identically at 45° angle for cooling and ventilation or in combination with heating

Accessories

  • Square plenum box, type REV-B
  • Square insulated plenum box, type REV-B ISO
  • Circular plenum box, type RER-B
  • Insulated circular plenum box, type RER-B ISO
  • Regulating valve for plenum box, type CRC
  • Polystyrene plenum box, type PPS-P with duct connection PPS-APD and mounting bar PPS-MB
(When using PPS-P plenum, a screw of at least 8cm must be provided by the installer himself)

Text for tender

Copy
  • The air supply diffusers are of the swirl type with adjustable black deflector blades. They are made of galvanised steel with white powder coated RAL 9016.
  • CAIROX type VWR-3A+REV-B

Order example

  • VWR-3A, 600, 24 + REV-B 600 + CRC 250

Explanation

VWR-3A = Diffuser type

600 = Plate size

24 = Slot quantity

Accessories

REV-B 600 = Plenum box for diffuser with 24 slots

CRC = Regulating valve for plenum box
250 = Plenum box connection diameter 250

Dimensions

VWR-3A
Slots
AXA [mm]
400/16
16
395x395
500/1616
495x495
600/1616
595x595
600/2424
595x595
625/2424
623x623

Flow patterns deflectors

Quick selection

VWR-3A   1624
QAk0.015480.03718
B1.21.82.71.21.82.7
150 H=2.70.090.120.08   
VzH=3.20.060.070.05   
 H=3.80.040.050.04   
Vk2.7 
X0,251.1 
Ps4 
Lw(A)<20 
200 H=2.70.120.150.110.090.110.09
VzH=3.20.080.10.070.060.070.05
 H=3.80.050.070.050.040.050.04
Vk3.61.5
X0,251.50.9
Ps82
Lw(A)22<20
250 H=2.70.150.190.130.110.140.11
VzH=3.20.10.120.080.070.090.07
 H=3.80.070.080.060.050.060.05
Vk4.51.9
X0,251.81.2
Ps124
Lw(A)29<20
300 H=2.70.180.230.160.130.170.13
VzH=3.20.120.150.10.080.10.08
 H=3.80.080.10.070.060.070.06
Vk5.42.2
X0,252.21.4
Ps185
Lw(A)35<20
350 H=2.7   0.160.190.15
VzH=3.2   0.10.120.09
 H=3.8   0.070.080.07
Vk 2.6
X0,25 1.7
Ps 7
Lw(A) <20
400 H=2.7   0.180.220.17
VzH=3.2   0.110.140.11
 H=3.8   0.080.10.08
Vk 3
X0,25 1.9
Ps 9
Lw(A) 24
500 H=2.7   0.220.280.21
VzH=3.2   0.140.170.14
 H=3.8   0.10.120.09
Vk 3.7
X0,25 2.4
Ps 14
Lw(A) 30
600 H=2.7   0.270.330.26
VzH=3.2   0.170.210.16
 H=3.8   0.120.150.11
Vk 4.5
X0,25 2.8
Ps 20
Lw(A) 36

Symbols and specifications

  • Q = Air volume in m³/h
  • Ak = Effective surface (free area) in m²
  • B = Distance between the diffusers in m
  • H = Installation height of the diffusers in m
  • Vz = Maximum velocity at the occupied zone according to distance between the diffusers and installation height in m/s
  • Vk = Average effective velocity through the diffuser in m/s
  • X0.25 = Throw length in m at an end velocity Vt of 0,25m/s
  • Ps = Static pressure loss given in Pa
  • Lw(A) = Acoustic power in dB(A)


  • The throw X0.25 is given at an end velocity of 0.25m/s for a smooth ceiling without any obstacles.
  • The values are given for isothermal supply air. Throw distances for cooling conditions at -11K can be calculated by dividing the X0.25 values with factor 1.1. For heating purposes at Dt of +11K a multiplier of 1.1 should be applied to the given X0.25 value.
  • In order to achieve a high comfort level, selections can be made according to the maximal velocity at the occupied zone Vz. These values are given at distances between diffusers B and installation heights H. Velocities Vz lower than, or equal to 0,25m/s at the occupied zone are advised.
  • The pressure losses Ps are given for diffusers without damper of with fully opened damper.
  • The acoustic power values Lw(A) are given for diffusers without damper of with fully opened damper without room attenuation. Acoustic powers below 20dB(A) are mentioned as "<20" in the tables.
  • For all special requirements, please contact our engineering office.

Placement instruction
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