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PLENUM BOX WITH MEASURER FOR LINEAR DIFFUSERS

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PLENUM BOX WITH MEASURER FOR LINEAR DIFFUSERS

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									                        PLENUM BOX WITH MEASURER                                                       3.33
                           FOR LINEAR DIFFUSERS                                                             ASE




                        Selection Guide
  Sound Selection Chart                                               2 Slots x 1000 - 200                       Size
                                                                          2 Slots x 1200 - 225
  Min 20    25     30   35
                                                                              2 Slots x 1800 - 250
           NR dB
                                                                                4 Slots x 1800 - 250

                             l/s                                                      6 - 8 Slots x 1800 - 300

                             10                 50      100                   500       1000                       5000



Ordering Procedure
Using the chart below, select your requirements and substitute the underscored text below.
Type..N..X..D..E

Example: If your requirement is for a 300mm square plenum with a 200mm dia inlet, the ordering code
would be: ASE..4..48..08..EL. (When ordering it is not necessary to include the periods (..)).

Note! Other sizes are available upon request. Please contact your nearest Bradflo of

                                            Product Size Numbers
                             No. of Slots    Length      Inlet dia.        No. of Ends
           "Type"                                                                                            Colour
                                 "N"          "X"           "D"                "E"

            ASE                    1        24 (600)     08 (200)           0E (No ends)                  Matt black on
                                   2        36 (900)     09 (225)        EL (One end left)                 inside faces
                                   3        48 (1200)     10 (250)       ER (One end right)

                                   4        60 (1800)                      2E (Two ends)

                                   5
                                   6
                                   7
                                   8



                                                                                                           Page. 12
    3.33                     PLENUM BOX WITH MEASURER
           ASE                  FOR LINEAR DIFFUSERS

Description                                              The damper is operated through the face of the dif-
                                                         fuser as is the connections for the measuring
The 3.33 ASE plenums provide multiple functions by       device.
incorporating into the acoustically designed plenum,
a damper and measuring device.                           The design of the plenum provides even air flow
                                                         across the face of the diffuser.
The multi-function plenum provides a technical,
acoustically highly effective air terminal device for    The plenum is manufactured from galvanised steel.
use with all types of square, rectangular and circular
diffusers. It includes a measuring and balancing
device which provides a simple and effective
method of measuring and balancing air flow.


Design dimensions




Page. 13                                 Bradflo reserves the right to make changes to product without prior notice
                 PLENUM BOX WITH MEASURER                                    3.33
                    FOR LINEAR DIFFUSERS                                      ASE


Sound data
NR levels for the grille may be determined from the
engineering graph.

Sound power level Lw

The generated sound power level Lw dB is calculat-
ed by adding the correction factor Kok (see table
below) to the sound level NR dB according to the
formula:

                  Lw = NR + Kok



             Frequency (cycles per second)
   Size      125 250 500 1000 2000 4000             8000
    200      +27 +16 +5 +6        +5    -5           -18
    225      +26 +16 +5 +6        +5    -5           -18
    250      +24 +16 +4 +5        +4    -6           -19
    300      +21 +13 +6 +7        +5    -7           -23
Tol +/-       2    2   2     2     2    2             2
Kok with jet pattern




Sound absorption ∆L dB
The sound absorption shown relates to a reduction
of the sound power level calculated from duct to
room. The end reflection is included in the values.

             Frequency (cycles per second)
   Size      125 250 500 1000 2000 4000             8000
    200       8    7   9    13     7   10            11
    225       7    6   8    11     6   10            10
    250       6    6   8    10     6    9            10
    300       5    6   7     9     5    9             8
Tol +/-       2    2   2     2     2    2             2




Bradflo reserves the right to make changes to product without prior notice    Page. 14
       3.33                                   PLENUM BOX WITH MEASURER
              ASE                                FOR LINEAR DIFFUSERS


2 slots x 1000 x 200 Inlet diameter                                                 2 slots x 1200 x 225 Inlet diameter
      Static Pressure (Pa)             Damper     C                                        Static Pressure (Pa)        Damper       C
250                                                                                  250
                                        30         35                           O                                            30     35

                                                                                                                       25
                                  25                                                                                                                  O
100                                                                                  100
                                                                                                                  20
                             20
 50                                                                                  50




 10                                                                                   10




  1                                                                                    1
      10           20                    50                 100         200   300          10           20              50              100   200   300
                                   Flow Rate (l/s)                                                                Flow Rate (l/s)


These graphs are for selection only and should not be used for commissioning




2 slots x 1500 x 250 Inlet diameter
      Static Pressure (Pa)              Damper          C
250
                                                      35                        O
                                             30

                                        25
100
                                   20

 50




 10




  1
      10         20                50             100             200         500
                                   Flow Rate (l/s)




Page. 15                                                            Bradflo reserves the right to make changes to product without prior notice
                        PLENUM BOX WITH MEASURER                                                                                 3.33
                           FOR LINEAR DIFFUSERS                                                                                            ASE


4 slots x 1000 x 200 Inlet diameter                                              4 slots x 1200 x 225 Inlet diameter
      Static Pressure (Pa)             Damper      C                                   Static Pressure (Pa)             Damper   C
250                                                                              250
                                                                                                                           35
                                        30         35                                                                    30
                                                                             O

100                               25                                             100                               25                                    O
                                                                                                              20
                             20
 50                                                                               50




 10                                                                               10




  1                                                                                1
      10           20                    50              100         200   300         10           20                  50           100         200   300
                                  Flow Rate (l/s)                                                              Flow Rate (l/s)


These graphs are for selection only and should not be used for commissioning




4 slots x 1500 x 250 Inlet diameter
      Static Pressure (Pa)               Damper           C
250

                                              30         35

                                        25                                   O
100
                                  20

 50




 10




  1
      10         20               50               100         200         500
                                  Flow Rate (l/s)




Bradflo reserves the right to make changes to product without prior notice                                                                 Page. 16
           3.33                              PLENUM BOX WITH MEASURER
               ASE                              FOR LINEAR DIFFUSERS

8 slots x 1000 x 225 Inlet diameter                                             8 slots x 1200 x 250 Inlet diameter
       Static Pressure (Pa)             Damper     C                                  Static Pressure (Pa)         Damper         C
250                                         35                                  250

                                        30                                                                             30      35
                                                                                                                  25                          O
100                                25                                           100
                                                                            O                                20
                              20

 50                                                                              50




 10                                                                              10




  1                                                                               1
      10              20            50             100          200     300           10         20          50             100       200   500
                               Flow Rate (l/s)                                                               Flow Rate (l/s)


These graphs are for selection only and should not be used for commissioning




8 slots x 1500 x 300 Inlet diameter

      Static Pressure (Pa)                Damper       C
250
                                              30       35

100                                      25

                                    20
                                                                        O
 50




 10




  1
      10         20           50             100       200            500
                              Flow Rate (l/s)




Page. 17                                                     Bradflo reserves the right to make changes to product without prior notice
                   PLENUM BOX WITH MEASURER                                                   3.33
                      FOR LINEAR DIFFUSERS                                                           ASE


Balancing graph

              Static Pressure (Pa)                        125   150 175 200 225 250    300 350 400
       150
      100

        50




       10

         5




         1
             10          20             50          100          200             500       1000         2000
                                                     Flow Rate (l/s)

Example:
If the measured differential pressure was 45 Pa and the size of the inlet 200 mm dia., the flow rate would
be approximately 170 l/s




Bradflo reserves the right to make changes to product without prior notice                           Page. 18

								
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