Vent Silencers A complete range of products for high pressure systems

Vent Silencer Overview A vent silencer is a device intended to reduce the very high noise levels created when high pressure gas or steam is expanded to the atmosphere. This noise is produced by rapid turbulence of the vented gas jet and the release of energy from the compressed gas. Most of the noise occurs at the expansion across the valve and is emitted at the stack opening. The vent silencer can also provide back pressure relief for the system ensuring proper operation. There are two noise reduction principles used in a vent silencer. The first is a reactive section (diffuser) to attenuate...

Our Capabilities • Acoustic design and optimisation • 3D CAD model engineering • Static calculation • Pressure part calculation • Pressure part design check • Pressure Equipment Directive (PED) compliance • Quality inspection • Full technical documentation • Full supply-chai

Vent Silencer Specifications Hydraulic sizing • Flow rate, valve set pressure and temperature • Saturated or Superheated Steam • Other gases: oxygen, methane... Type of operation • Safety: intermittent operation • Control, start-up and blow down: regular or continuous operation Pressure Drop / Back Pressure • Valve integrity factor • Control and stabilisation of process condition Material Specification • From low temperature to high temperature • Corrosion allowance Noise Guarantee details • Point of measure • Pipe noise interference Pipe Connection • Butt weld • Flanges • Counters flanges /seals...

Standard Range Noise reduction dB(A) Special Available for higher noise reduction Super Extreme Super Critical

Connection (Standard supply: Butt weld) Connecting flanges • Standard: WN flanges Class 150# as per ASME B 16.5 • Options available for other classes and alternatives (e.g. slip-on) Support Standard supports are part of the bottom plate Other supports can be supplied as options Stuffing Box Allows pipe movements due to thermal expansion, avoiding nozzle loads • Standard radial movement is +/- 20mm • Standard axial movement up to 50mm • Pipe sealing is maintained Rain Hoods • Prevents rain entering the silencer • Bottom drain as standard

Our Customers Boet Stopson has provided vent silencers to some of the largest organisations around the world. Some of of past clients include: Air Liquide Thermax Jacobs Boccard Cegelec Cevital SPA CME Engineering Cockerill Mechanical Industrie Diamond Power APA Gasnet Foster Wheeler EDF Dresser Exxon Technip Chiyoda Total JGV Aramco Reliance ESB COFIVA QatarGaz SNC-Lavalin CTEP CNIM Alstom PraxAir

Boët StopSon - 26 rue Paul Doumer Bp 704 - 59657 Villeneuve d'Ascq 59657 Cedex - Standard +33(0)3 20 05 88 88 - Fax : + 33(0)3 20 05 88 99 - Email : [email protected] - www.boet-stopson.com