NAP
ACOUSTICS SOUTH EAST ASIA PTE LTD
DESIGNERS & MANUFACTURERS OF NOISE AND
VIBRATION CONTROL PRODUCTS
NAP Industrial Silencers
| RAE medium degree straight-through absorption type silencer |
| See below for dimensions |
| Description RAE or RAS absorption silencers are straight through types with side or end inlets and end outlets. Used in all applications where medium acoustic performance is required. The absorptive design also results in minimal pressure loss as the gas flows through the silencer bore. |
| Application Typical applications include intakes of petrol and diesel engines, intakes and discharges of rotary blowers, screw axial and reciprocating compressors, disharges of vacuum pumps, blowers and boiler flues. |
| Details NAP RAE industrial silencers are straight through absorptive silencers. The RAE model is for medium acoustical performance (10-15 dbA). The insertion loss of these silencers varies according to the inlet diameter, and is tabulated for easy reference. Noise is absorbed by long strand fibreglass retained and protected by the inner perforated steel tube. These silencers are used to control mid frequencies in the sound spectrum. |
Physical Dimensions
| Size (A) | Ø (C) | Length (D) | Body Length (B) | Weight (kg) |
| 50 | 150 | 925 | 825 | 5 |
| 75 | 200 | 1075 | 975 | 15 |
| 90 | 200 | 1075 | 975 | 18 |
| 100 | 225 | 1225 | 1125 | 27 |
| 125 | 225 | 1225 | 1125 | 35 |
| 150 | 380 | 1700 | 1500 | 60 |
| 200 | 450 | 1700 | 1500 | 80 |
| 250 | 550 | 2000 | 1800 | 115 |
| 300 | 650 | 2350 | 2100 | 180 |
| 400 | 800 | 3200 | 3000 | 295 |
| 500 | 1000 | 3700 | 3500 | 400 |
Dimensions in mm and weights in kg
Note :
1. Tolerance ±
3mm.
2. Inlet dimensions are nominal pipe sizes only.
3. RAS Silencers are available side entry, end exit or end entry,
side exit.
4. Table D flanges are standard.
Acoustic Performance
| Insertion Loss, dB | ||||||||
| Inlet (mm) | 63 Hz | 125 Hz | 250 Hz | 500 Hz | 1 kHz | 2 kHz | 4 kHz | 8 kHz |
| 100 | 5 | 10 | 16 | 19 | 22 | 24 | 26 | 20 |
| 150 | 7 | 11 | 18 | 20 | 24 | 26 | 24 | 18 |
| 200 | 9 | 14 | 18 | 21 | 24 | 26 | 21 | 14 |
| 250 | 9 | 16 | 20 | 22 | 26 | 25 | 19 | 11 |
| 300 | 13 | 20 | 23 | 24 | 26 | 24 | 16 | 8 |
Use IL values for 300mm at larger inlet diameters.
Pressure Drop
| The internal bore of the silencer is equal to the inlet diameter and consequently the gas flows through the silencer without restriction resulting in a pressure drop no greater than the equivalent length of straight pipe. |
| Industrial Silencers | Other Products | Projects |
Copyright © 1999 NAP Acoustics South East Asia
Pte Ltd. All rights reserved.
Information in this document is subject to change without notice