Silencers are entirely welded in carbon steel S235 JR with internal and external protection provided by a high temperature black prime paint. Heat emission is reduced by internal insulation in all our silencers ensuring low surface temperatures. The nominal diameter of the inlet and exhaust (DN) and also the noise reduction rating (15,25,30,40) determines the name of the silencers.

The gas flow direction must be observed. It is marked by an arrow on the body of the device. Our silencers can be placed horizontally or vertically depending on the space available and the position of the pipes. We can advise you on the most suitable inline position for the silencers. All our silencers > 50 kgs are equipped with hoisting eyes welded into the casing of the apparatus to facilitate handling.

This type of equipment is not a pressure vessel and is therefore not subject to specific tests or controls. A dimensional check report and visual inspection will be carried out in our workshops. For special application we can provide you with welding record, certificate of materials, assembly plan, various notes and calculations, identification and packing list, acceptance report by an official body. a general arrangement drawing of the whole product is automatically provided.

For high attenuation or low residual levels, we would recommend sound insulation of the silencer casing and also the flanges and the pipes upstream of the silencer in order to eliminate radiations of unsilenced noise.

Where high attenuation or low residual levels are required it is advisable to use a flexible connection from the engine to isolate vibrations, Similarly, antivibration mounts may be provided between the silencer and its support structure.

The acoustic definition of our SM silencers has been optimized by our Research and Development department. Our silencers are based on two noise-reducing principles: - Absorption - SM15P and SM25P

- Reactive and wave phase shift plus absorption for SM30P and SM40P