A complete range of products for high pressure · PDF fileVent Silencer overview ... • Acoustical design and optimization • 3D CAD model engineering ... [70 kg/s] Critical From

Vent SilencersA complete range of products for high pressure systems

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IAC Acoustics Making the World a Quieter Place

Founded on an unrivalled history of engineering with some of the most pioneering discoveries in the industry, the IAC Acoustics brand is synonymous with technological innovation. From controlling noise at a power station to tuning the sound in a TV or radio studio, IAC Acoustics has had a positive impact on society and helped to shape what can be achieved to make speech more intelligible, music more enjoyable, reduce the impact of industrial noise and protect peoples’ sense of hearing. The continual success of our products and services over the decades has brought the brand a reputation for quality and reliability among customers, whether they are multinational corporations or independent family businesses. This is supported by the expertise and passion of our workforce, the people behind the products, including designers, engineers and industry specialists. To face the ever increasing noise reduction demands of the future, we will strive to further enhance our ability to reduce excessive noise. We aim to focus on developing tomorrow’s solution today, innovating faster and delivering solutions that meet the requirements of the next generation. In doing so, we will stay true to our key values and founding philosophy to make the world a quieter place.

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Vent Silencer overview

Vent Silencer specifications

Vent Silencer standard range

Selection tool

Standard dimentions

Options

Our customers

Office contacts

Page

Vent Silencer Overview

Typical Applications• Safety valve (PSV)• Relief valve (PRV)• Ejector• Start up valve• Snort-valve• Flash and blow down tanks

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• Acoustical design and optimization• 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-chain service

Typical Installations Include:• Combined cycle• CHP plants• Fossil fuel power plants• Thermal solar plants• Nuclear power stations• Industrial applications• Oil and gas applications

Our Capabilities

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 the low frequencies and provide broad band noise reduction.

The second principle is absorption of the high frequency audible noise into a sound absorbing material.

Vent Silencer SpecificationsHydraulic Sizing• Flow rate, valve set pressure

and temperature• Saturated or superheated steam • Other gases: including oxygen and 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 stabilization 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 / bolts

Rain Hoods• Impact on noise guarantee depending on

measure point• Snow and ice issue

PED• Applicable within the EEC and elsewhere

whenever the customer requires it• For silencer with diffuser tubes and pressure

drop (1st stage) above 0.5 bar g• Mechanical withstand guarantee: NDT, PMI,

CE Marking

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Vent Silencer Standard Range

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ResidentialFrom 0 to 150 lb/s [70 kg/s]

CriticalFrom 0 to 150 lb/s [70 kg/s]

Super CriticalFrom 0 to 90 lb/s [40 kg/s]

ExtremeFrom 0 to 90 lb/s [40 kg/s]

Super ExtremeFrom 0 to 90 lb/s [40 kg/s]

Noise Reduction dB(A)

SpecialAvailable for higher noise reduction

Selection Tool

Fluid description

Mass flowrate

Inletconnection

Residual noise level

Selection tool

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All IAC Acoustics standard vent silencers can be configured online using our selection tool

Contact IAC Acoustics to receive your unique username and password, then visit:http://vent.iac-acoustics.com

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Vent Silencer DimensionsLength (inches) Weight (lb)

Outer Diameter Residential Critical Super

Critical Extreme Residential Critical Super Critical Extreme

13 20 20 20 24 104 108 112 12819 30 30 30 36 236 243 265 30225 40 40 40 48 408 419 465 53431 50 50 50 60 626 644 723 83335 55 55 55 67 800 822 922 106337 60 60 60 72 928 955 1074 123741 65 65 65 78 1091 1124 1268 146244 70 70 70 84 1250 1285 1451 167847 75 75 75 90 1429 1470 1664 192550 80 80 80 96 1636 1682 1951 225854 86 86 86 103 2101 2163 2474 287357 92 92 92 110 2573 2646 3007 347961 98 98 98 118 2950 3034 3450 399566 105 105 105 126 3382 3481 4030 466770 113 113 113 135 3882 3993 4914 574175 121 121 121 145 4456 4583 5655 661681 129 129 129 155 5117 5265 6557 767087 139 139 139 166 5878 6047 7553 884793 148 148 148 178 8164 8397 10152 11949

Vent Silencer Options

Product Referencing3 VS RE M 1030 CS 080

CR

SC

SEProduct Group

FamilyVent Silencer

Acoustic Performance

Measurement Unit

MetricImperial

Silencer Diameter

MaterialCarbon Steel

Inlet Pipe Diameter

( 10 x inches )

EX

Above figures are given as information only

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)

SupportStandard supports are part of the bottom plate and other supports can be supplied as options

Stuffing BoxAllows 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

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IAC Acoustics has provided vent silencers to some of the largest organizations around the world.

Some of of past clients include:

Air LiquideThermaxJacobsBoccardCegelecCevital SPACME EngineeringCockerill Mechanical IndustriesDiamond PowerAPA GasnetFoster WheelerEDFDresserExxonTechnipChiyodaTotalJGVAramcoRelianceESBCOFIVAQatarGazSNC-LavalinCTEPCNIMAlstomPraxAir

Contacts

Making the world a quieter place

Head Office - Winchester, UKT: +44 (0) 1962 873 000F: +44 (0) 1962 873 111E: [email protected]

AustraliaT: +61 (0) 2 8781 0400F: +61 (0) 2 9725 2939E: [email protected]

CanadaT: +1 (905) 612 4000F: +1 (905) 612 8999E: [email protected]

ChinaT: +86 (0) 769 89899966 802F: +86 (0) 769 89899966 810E: [email protected]

DenmarkT: +45 36 77 88 00F: +45 36 78 12 30E: [email protected]

FranceT: +33 (0) 3 20 05 88 88F: +33 (0) 3 20 05 88 99E: [email protected]

GermanyT: +49 (0) 2163 9991 0F: +49 (0) 2163 9991 23E: [email protected]

ItalyT: +39 02 48 44 22 1F: +39 02 48 44 22 22E: [email protected]

SpainT: +34 93 321 6684F: +34 93 321 6249E: [email protected]

UAE - DubaiT: +971 42 517 456F: +971 42 517 457E: [email protected]

USA - HoustonT: +1 (832) 554 0980F: +1 (832) 554 0990E: [email protected]

USA - LincolnT: +1 (402) 323 7272F: +1 (402) 323 7271E: [email protected]

USA - New YorkT: +1 (718) 931 8000F: +1 (718) 863 1138E: [email protected]

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