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

  • Swirl diffusers
  • Square
  • Steel
  • White, RAL 9016
  • Adjustable blades

Square swirl ceiling diffusers with adjustable blades

Brand

  • Cairox

Application

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

Material

  • Steel

Colour

  • Standard colour white, RAL 9016 with black blades

Composition

  • Square swirl ceiling diffuser made of 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

Text for tender

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

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

Flow patterns deflectors

Selection

VWR-3A1624
QAk0.015480.03718
B1.21.82.71.21.82.7
150VzH = 2.70.090.120.08  
H = 3.20.060.070.05  
H = 2.80.040.050.04
Vk2.7 
X0.251.1 
Ps4 
Lw(A)<20 
200VzH = 2.70.120.150.110.090.110.09
H = 3.20.080.10.070.060.070.05
H = 2.80.050.070.050.040.050.04
Vk3.61.5
X0.251.50.9
Ps82
Lw(A)22<20
250VzH = 2.70.150.190.130.110.140.11
H = 3.20.10.120.080.070.090.07
H = 2.80.070.080.060.050.060.05
Vk4.51.9
X0.251.81.2
Ps124
Lw(A)29<20
300VzH = 2.70.180.230.160.130.170.13
H = 3.20.120.150.10.080.10.08
H = 2.80.080.10.070.060.070.06
Vk5.42.2
X0.252.21.4
Ps185
Lw(A)35<20
350VzH = 2.7   0.160.190.15
H = 3.2   0.10.120.09
H = 2.8   0.070.080.07
Vk 2.6
X0.25 1.7
Ps 7
Lw(A) <20
400VzH = 2.7   0.180.220.17
H = 3.2   0.110.140.11
H = 2.8   0.080.10.08
Vk 3
X0.25 1.9
Ps 9
Lw(A) 24
500VzH = 2.7   0.220.280.21
H = 3.2   0.140.170.14
H = 2.8   0.10.120.09
Vk 3.7
X0.25 2.4
Ps 14
Lw(A) 30
600VzH = 2.7   0.270.330.26
H = 3.2   0.170.210.16
H = 2.8   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.

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