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DRUM JET DIFFUSERS

These diffusers are designed to handle large air volumes on comparatively long throws. They are ideally suited for exposed duct or sidewall applications in large open spaces such as
warehouses, atria, factories, auditoriums, sports halls (excluding badminton courts) and swimming pools. There are eight sizes of unit to cover most situations. The angle of discharge can be adjusted through 60 degrees in one plane.

STANDARD •
Code 0151. Drum jet diffuser.
Code 0150. Diffuser mounted opposed blade damper.
Code 0152. Duct mounted opposed blade damper.
Code 0154. Duct mounted air turn.
Code 0153. Diffuser mounted air turn.

 
Standard Specification

SIZES
The eight units have a nominal height of either 170mm or 271mm. There are four nominal lengths in the 170mm height i.e. 261mm, 337mm, 490mm and 642mm. There are four nominal lengths in the 271mm height i.e. 540mm, 667mm, 794mm and 921mm.

CONSTRUCTION
The frame and drum of the diffuser are aluminium with brush strips to provide a low friction air seal between them.

FINISH
Silver satin anodised to BS1615 AA5.

FIXINGS
Countersunk screw holes in the border. Size No
6 x 1´´ self tapping screws provided with each diffuser and painted the same colour as the diffuser. (Fixing Type OF1).

PACKAGING
Each diffuser is individually wrapped in corrugated cardboard and then shrink wrapped with cardboard to top and bottom surfaces.

TECHNICAL INFORMATION
See pages 2 - 5

 

 
Optional Alternatives/Additions

Opposed blade damper.
An opposed blade damper in mill finish aluminium can be supplied attached to the diffuser (Code 0150) or for duct mounting (Code 0152).

Combined air turn, volume equaliser and controller.
A mill finish aluminium combined air turn, volume equaliser and controller can be supplied attached to the diffuser (Code 0153) or for duct mounting (Code 0154).

Finishes
Any BS or RAL colour in stove enamel paint. Code 0158. Powder coating is not recommended for this type of diffuser.

• The code for the basic grille should have 13 digits.
See page 1.
• Please always give length first, then height.
• Add codes for alternatives / additions as suffixes.

EXAMPLE:
A drum jet diffuser to fit a nominal duct size of 261mm long x 170 mm high with an opposed blade damper attached and stove enamelled to RAL 9010 would be coded 0151/00261/0170+0150+0158 RAL9010 matt

Ordering Detail

Opposed blade damper.
An opposed blade damper in mill finish aluminium can be supplied attached to the diffuser (Code 0150) or for duct mounting (Code 0152).

Combined air turn, volume equaliser and controller.
A mill finish aluminium combined air turn, volume equaliser and controller can be supplied attached to the diffuser (Code 0153) or for duct mounting (Code 0154).

Finishes
Any BS or RAL colour in stove enamel paint. Code 0158. Powder coating is not recommended for this type of diffuser.

 

 
 
PERFORMANCE DATA FOR
DRUM JET DIFFUSER CODE 0151
• Selection Example: Size 00642/0170 Drum Jet supplying an air flow rate of 4001/s. Throw = 17m, (red line) Noise = NR26 (blue line), Pressure Loss = 45Pa. This example is based on ambient air. Assume you have a temperature differential of +10°, from rise and fall/temp differential chart on page 4. 17m throw at 10° temp differential = 4m rise and fall. From rise & fall chart on pages 4 - 5, 4m rise and fall to achieve 17m throw = 16° downward angular correction.
 
PERFORMANCE DATA
RISE AND FALL / TEMPERATURE
DIFFERENTIAL FOR
CODE 151 DRUM JET DIFFUSER
PERFORMANCE DATA
RISE AND FALL FOR
CODE 151 DRUM JET DIFFUSER
PERFORMANCE DATA
 
 
 
 
 

 

 

 

 
   
 
 
 
   
   
   
   
   
 
  SCOTTAIRE Davy Way, Llay Industrial Estate, Wrexham,LL12 0PG Tel: 01978 856555 Fax: 01978 856655 Email: sales@scottaire.com