For diesel or gas powered generator sets.

 CES have developed a range of high performance box type exhaust silencers which have the following advantages over cylindrical type conventional silencers:

These silencers are designed to achieve a high degree of acoustic performance, which in turn is governed by the number of internal chambers or passes. In a typical installation, the performances achieved would be as follows:

	at one metre	at 7 metres
single pass	85dBA	75dBA
two pass	75dBA	65dBA
three pass	65dBA	55dBA
four pass	55dBA	45dBA

 (nb. this relates to noise emanating from the exhaust tailpipe only. Long length tailpipes will produce lower noise levels.)

 Gas Flow Resistance

Gas flow resistance in mm wg is calculated from established test data. 

Conversion data as fdollows:

1 in wg = 25.4 mm wg = 249 Pa = 249 N/m²

1 mm wg = 0.04 in wg = 9.96 Pa

1 in Hg = 13.59 in wg = 345 mm wg

Constructional Specification

The silencers have a fully welded 2.5mm thick zinc coated steel outer skin and internal baffling. The internal chambers are filled with rigid 110kg/m3 high temperature rockfibre slab, retained in place with perforated galvanised sheet tubes.

The inlet connection(s) are normally flanged to BS10 table D with off centre line drillings. The outlet can either be a similar flange or a mitred tailpipe of length to suit individual requirements.

The silencer is finish painted with high temperature aluminium.

bore/type	L mm	W mm	H mm	offset mm	kg
3"/1P	900	200	200	100	26
3”/2P	900	400	200	100	54
3”/3P	900	600	200	100	78
3”/4P	900	800	200	100
4”/1P	1200	300	300	150	41
4”/2P	1200	600	300	150	82
4”/3P	1200	900	300	150	129
4”/4P	1200	1200	300	150
5”/1P	1500	375	375	187
5”/2P	1500	750	375	187
5”/3P	1500	1125	375	187
5”/4P	1500	1500	375	187
6”/1P	1800	450	450	225	112
6”/2P	1800	900	450	225	194
6”/3P	1800	1350	450	225	250
6”/4P	1800	1800	450	225
8”/1P	2100	600	600	300	227
8”/2P	2100	1200	600	300	395
8”/3P	2100	1800	600	300	565
8”/4P	2100	2400	600	300
10”/1P	2400	750	750	375	346
10”/2P	2400	1500	750	375	564
10”/3P	2400	2250	750	375	807
12”/1P	2700	900	900	450	700
12”/2P	2700	1800	900	450	1010
12”/3P	2700	2400	900	450	1350
14”/1P	3000	1000	1050	525	900
14”/2P	3000	2000	1050	525	1220
14”/3P	3000	3000	1050	525	1650

For further information please contact CES at

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120203