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VWR-FSA (RAL9016) • Square swirl diffusers with fixed blades

Swirl ceiling diffusers with high induction rate, consisting of a square plate with multiple fixed blades arranged in a circular pattern, to be equipped with galvanized steel plenum box.

Brand

  • Cairox

Application

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

Material

  • Steel

Colour

  • Standard colour white, RAL 9016
  • Other colours available upon request

Composition

  • Frontplate made of powder coated steel
  • Central screw mounting

Mounting

  • Fixing by central screw in the crossbar of the plenum box

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

Text for tender

Copy
  • The air supply ceiling diffusers are square with a circular arranged swirl with fixed blades. They are made of a steel powdercoated frontplate in white finish RAL 9016. The diffusers are standard delivered with galvanized steel plenumbox equipped with perforated plate and damper in the side entry spigot. The diffuser is centrally screw mounted.
  • Cairox type VWR-FSA + RER-A

Order example

  • VWR-FSA, 600/540 + RER-B 600 + CRC 250

Explanation

VWR-FSA = Diffuser type

600/540 = Diffuser size/swirl size

Accessories

RER-B = Plenum box type

600 = Size plenum box

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

Dimensions

 D [mm]D1 [mm]D2 [mm]D3 [mm]A#Blades
VWR-FSA 3002381002362984128
VWR-FSA 4003381503363984130
VWR-FSA 5004381504364984132
VWR-FSA 6005381505365962232
VWR-FSA 625*5381505366232232
* niet meer verkrijgbaar / n'est plus disponible / no longer available

Quick selection

VWR-FSA300400500600625*
 Ak0.010.0160.0330.0490.049
QB1.22.43.61.22.43.61.22.43.61.22.43.61.22.43.6
100 H=2.70.20.150.120.150.110.09         
VzH=3.20.150.120.10.110.090.07         
 H=3.80.120.10.080.090.070.06         
Vk2.81.7   
X0,251.20.8   
Ps32   
Lw(A)<20<20   
150 H=2.70.30.220.170.220.170.130.160.120.1      
VzH=3.20.230.180.150.170.140.110.130.10.08      
 H=3.80.180.150.130.140.110.10.10.080.07      
Vk4.22.61.3  
X0,251.81.30.9  
Ps853  
Lw(A)3021<20  
200 H=2.7   0.30.220.180.210.160.130.140.10.080.140.10.08
VzH=3.2   0.230.180.150.160.130.110.110.090.070.110.090.07
 H=3.8   0.180.150.130.130.110.090.090.070.060.090.070.06
Vk 3.51.71.11.1
X0,25 1.91.20.70.7
Ps 9422
Lw(A) 28<20<20<20
250 H=2.7   0.370.270.220.260.20.160.180.130.110.180.130.11
VzH=3.2   0.290.230.190.20.160.140.140.110.090.140.110.09
 H=3.8   0.230.190.160.160.140.120.110.090.080.110.090.08
Vk 4.32.11.41.4
X0,25 2.31.611
Ps 13733
Lw(A) 3322<20<20
300 H=2.7      0.310.230.190.210.160.130.210.160.13
VzH=3.2      0.240.190.160.170.140.110.170.140.11
 H=3.8      0.190.160.140.140.110.10.140.110.1
Vk  2.51.71.7
X0,25  1.91.21.2
Ps  1044
Lw(A)  27<20<20
400 H=2.7      0.420.320.250.290.220.180.290.220.18
VzH=3.2      0.330.260.220.230.180.150.230.180.15
 H=3.8      0.260.220.190.180.150.130.180.150.13
Vk  3.42.32.3
X0,25  2.71.81.8
Ps  1888
Lw(A)  352626
500 H=2.7      0.520.390.310.350.270.220.350.270.22
VzH=3.2      0.410.320.270.280.220.190.280.220.19
 H=3.8      0.320.270.230.220.190.160.220.190.16
Vk  4.22.82.8
X0,25  3.52.32.3
Ps  271212
Lw(A)  403131
600 H=2.7         0.430.320.260.430.320.26
VzH=3.2         0.340.270.230.340.270.23
 H=3.8         0.270.230.20.270.230.2
Vk   3.43.4
X0,25   2.92.9
Ps   1717
Lw(A)   3737
700 H=2.7         0.50.380.310.50.380.31
VzH=3.2         0.40.320.270.40.320.27
 H=3.8         0.320.270.230.320.270.23
Vk   44
X0,25   3.53.5
Ps   2424
Lw(A)   4141

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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