SN115 "Medium Duty" Exhaust Silencers
SN 114 << Back to Silencers >>SN 116
If you have any questions relating to this or any of our products, please do not hesitate to contact us.
General Specification
These silencers incorporate a multiple pass section to smooth the gas flow and a sound absorption section to attenuate the higher frequency sounds. They are suitable where moderate sound attenuation is required but space is limited. If higher attenuation is required and space is not restricted, we advise fitting an SN 114 or SN 116 type.
Construction
A cylindrical steel body with all welded seams. End plates for sizes 25mm - 76mm bore (1" - 3") are heavy steel pressings and for larger sizes are manufactured from flat plate.
End Connectors
Unless otherwise specified, screwed BSP connectors will be supplied on 25mm - 76mm (1" -3") silencers and flanges to BS10 (Table D) on all larger sizes. Flanges to other standards can be supplied on special quotation.
Side Entry Silencers
If these are required, please specify SN 115(SE) when ordering.
| Nominal Bore (A) | Diameter (B) | Length (C) | (D) | (E) | (F) | (G) | (H) | (I) | Approx. weight (kilos) |
| 25 (1") | 95 (3¾") | 254 (10") | 38 | 14 | 16 | 8 | 1.5 | ||
| 32 (1¼") | 95 (3¾") | 305 (12") | 38 | 17 | 21 | 11 | 2 | ||
| 38 (1½)" | 121 (4¾") | 381 (15") | 50 | 21 | 24 | 13 | 3 | ||
| 50 (2") | 133 (5¼") | 508 (20") | 50 | 27 | 30 | 14 | 4.5 | ||
| 64 (2½") | 178 (7") | 610 (24") | 50 | 33 | 38 | 19 | 7 | ||
| 76 (3") | 203 (8") | 737 (29") | 63 | 41 | 48 | 22 | 12 | ||
| 89 (3½") | 254 (10") | 737 (29") | 76 | 75 | 203 | 44 | 51 | 25 | 21 |
| 100 (4") | 279 (11") | 889 (35") | 76 | 75 | 216 | 52 | 59 | 29 | 27 |
| 125 (5") | 356 (14") | 889 (35") | 76 | 83 | 254 | 65 | 75 | 37 | 32 |
| 150 (6") | 406 (16") | 1000 (39") | 76 | 95 | 279 | 78 | 89 | 44 | 57 |
Note (i) all dimensions in millimetres
Typical Noise Attenuation Graph
The above graph is based on simplified theoretical considerations and extrapolated from various noise tests. The actual noise reduction obtained on any particular installation will depend upon the power and type of the noise source, the local environment and the selection of the correct size of silencer for that engine.
Velocity / Resistance Graph
This graph is based on simplified theoretical considerations and is issued as a guide. The actual resistance experienced will depend on a number of factors affecting the individual installation.
If you have any questions relating to this or any of our products, please do not hesitate to contact us.