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Sound Attenuator: Featured Standard Construction

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SOUND ATTENUATOR

AIR MOVEMENT PRODUCTS


SQUARE-RECTANGLE
CSA

APPLICATION

CSA, dissipative SOUND ATTENUATOR


(SILENCER), is designed to provide solutions to all
HVAC discharge noise with high dynamic insertion
loss.

FEATURED STANDARD CONSTRUCTION


• FRAME:
-Constructed from 20 gauge galvanized frame, formed with lock seams with mastic
sealant.
- The top and bottom of the casing covered with fiber clean liner 1”(25mm) thick
protected by 22 gauge perforated metal sheet.
• SPLITTERS:
- Constructed from 22 gauge galvanized frame.
- 8”(200mm) wide radiussed at one end to minimize air pressure loss and regenerated
noise.
- Filled with acoustic fibers complying with various standards requirements.
The infill is compressed and contained behind a 22 gauge, 4mm hole diamater
perforated metal sheet. This protection prevents damage and fiber erosion up to
5900fpm (30m/s).
- Clean liner glass fiber as last layer.
• AIR WIDTH:
- Varies between 3”(75mm), 4”(100mm), 6”(150mm) & 8”(200mm) depending on
required insertion loss and pressure drops.
• SIZES:
- Minimum size of 11”(275mm)W x 8”(200mm)H
- Rectangular silencers with weight that exceed 200Kg (441Lbs) are manufactured as
multiple section and field assembled (By others).

OPTIONS
• 18Ga or 16Ga casing & splitters frame.
• Aluminum Construction
• Stainless Steel Construction
• Standard galvanized Duct-mate flange 1-3/8” (35mm) with finished corners for
Galvanized Construction.
• Standard Stainless Steel normal duct flange 1-3/8” (35mm) with finished corners.
for Stainless Construction.
ACOUSTICAL PERFORMANCE TESTING TESTED AT 400°C FOR 2 HOURS
WAS PERFORMED BY: TEST WAS PERFORMED BY:
ETL-INTERTEK-USA APPLUS+ LABORATORIES
ACCORDANCE TO ASTM E-477

Page 1/2
SAP
www.kbeinternational.com REV:2.0 2021
ALL STATED SPECIFICATION ARE SUBJECTED TO CHANGE WITHOUT NOTICE OR OBLIGATION Date:17/06/2021
SOUND ATTENUATOR
SQUARE-RECTANGLE
AIR MOVEMENT PRODUCTS
CSA

ILLUSTRATIONS

Fiber Glass
Density
64Kg/m3

Perforated Sheet W

Clean Liner as
last layer. H

22Ga glavanized
frame with Radiussed
Shape

Clean Liner as
last layer.
W

H Perforated Sheet

Air Width
20 X

ACOUSTICAL PERFORMANCE TESTING TESTED AT 400°C FOR 2 HOURS


WAS PERFORMED BY: TEST WAS PERFORMED BY:
ETL-INTERTEK-USA APPLUS+ LABORATORIES
ACCORDANCE TO ASTM E-477

Page 2/2
SAP
www.kbeinternational.com REV:2.0 2021
ALL STATED SPECIFICATION ARE SUBJECTED TO CHANGE WITHOUT NOTICE OR OBLIGATION Date:17/06/2021

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