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STODDARD SILENCERS OF CANADA INC.
Enjoy the Silence…
Who We AreWe at Stoddard Silencers are dedicated to the manufacturing and supplying of products that
combat noise pollution as well as vibration and aid in the creation of a safe environment
for people in the workplace.
What We Do
We combat Noise Pollution and for that we design & manufacture Industrial Silencers
All our products are custom-made to meet the criteria specified by the customer, no silencer
can be too small or not big enough.
To Us, every project is unique and we take pride in our work from the beginning to the end.
What We Don’t Make!!!
Gun Silencers
Automotive Silencers
How The Ear Works
What Causes Hearing Loss
Healthy cochlea. This person would have normal hearing
Damaged cochlea. This person would be suffering
severe hearing loss
How Loud is LoudEFFECT ON
PEOPLESOUND LEVEL (in
dbA) SOUND SOURCE
High Injurious-------------------------InjuriousIrritating------------------------- -------------------------
1401301201101008580706050403020100
Jet engineJack hammerPAIN THRESHOLDChain Saw Sheet-metal workshopGENERAL STANDARD FOR 8 HRS Heavy traffic Normal conversationLow conversationQuiet radio music WhisperingQuiet urban roomRustling leavesHEARING THRESHOLD
Effects Hearing loss Increased risk of cardiovascular disease Mood swings Irritability Insomnia Performance Reading & memory
Regulations
Column 1 Column 2SOUND LEVEL DURATION
in decibels hours per24-hour day
90 892 695 497 3100 2102 `1-1/2105 1110 `1/2115 `1/4
Over 115 No exposure
Table
How To Control Noise Induced Hearing Loss
Eliminate noise hazards at the source. Design quieter equipment. Modify existing equipment. Isolate vibrating or noisy parts in a
machine. Substitute noisy device with a quieter
solution.
The Science of Noise Noise unit of measurement is a
decibel. Three scales of measurement
(A,B,C and D) most commonly used is dbA.
Noise measurements usually taken with a sound meter.
Factors for A-weighting Octave Bands
Its All About LocationLocation Typical (dBA)
Wilderness Ambient 35Rural Residential 40Agri Crop Land 44Wooded Residential 51Old Urban Residential 60Urban Housing on Major Street 68Urban High Density Apartment 78Downtown with some Area Construction 793/4 Mile from Major Airport 86Apartment next to Freeway 88
The Answer?
Silencers
Silencers…
Silencer Applications Discharge of pipes for vents Path of a duct for heating and
ventilation On air intake of engines, gas turbines,
rotary blowers and compressors On exhaust of reciprocating engines
and vacuum pump discharges
How a Silencer is Sized Flow Speed Pressure requirements Temperature Connection size Required dbA level
Blower Silencers
Blower Silencers
Inlet and discharge silencers are necessary for any blower installation.
Industries Plastics industry Carpet cleaning Air drying Vacuum cleaning and filtration Wastewater treatment
Types of Blower Silencers Chamber Silencer (Reactive) Absorption Silencer (Dissipative) Chamber-Absorption Combination
(Reactive and Dissipative)
Stoddard Blower Silencers D13 Models (Chamber type) L21 Model (Absorption type) C23 & C26 (Absorption type) D33 Model (Combination type)
Vacuum Blower Silencers D13 & D33 models( Dry Vacuum
Silencers) V31 & V32 Models (Wet Vacuum
Silencers)
Vacuum Silencers
Fan Silencers
Fan Industries Steel manufacturing Casting plants Pulp and paper Mining industry
Types of Fan Silencers
C24 Model (Flat Head Design)
C26 Model (Dished Head Design)
Electrical Motor Silencer
Industries Pulp & Paper Mining Steel Plants Power Plants Casting Plants
Engine Silencers
Industries Natural Gas Compression Power Generation Marine Boat Construction Large Construction Equipment
Grades of Silencers Industrial Grade (E21 & E22) Semi –Residential Grade (E12) Residential Grade (E13) Critical Grade (E14) Hospital Grade (E15) Hospital Plus Grade (E16)
Alternative Engine Silencers
Chamber Resonator (E31,E32 & E33)
Spark Arrestor (E52 & E53)
Spark Arrestor Silencer
Catalytic Silencers
Industries
Natural Gas Compression Power Generation Electrical Power Plants
Gas Turbines
Industries
Power Plants
Power Generation
Sizing Requirements Mass Flow (CFM – cubic feet per
minute) Allowable pressure drop Required noise levels Size of turbine connections Size of transition connection Space and weight limitations
Vent Silencers
Industries Petrochemical plants Mining Pulp and Paper Mills Steel Plants Refineries (Oil, Gas, Sugar) Power Generation
Vent Silencer& Blowdown Applications
Safety Valves Station & Pipeline Blowdowns Steam Ejectors Switch Valves Autoclaves Process Control Valves Boiler Startup and Purge Pressure Regulators
Required Sizing Information
Type of Gas Weight or gravity of gas Mass flow Upstream pressure and temperature Valve type and size Allowable pressure drop Installation (Vertical or Horizontal) Piping Size and Arrangement
Types of Vent Silencers B13 B14 B15 B34
Enclosures
Enclosure Applications Control noise Control contaminants such as
fumes Contain excessive moisture or
temperature
Sizing an Enclosure Height, Length and Width of the
equipment to be enclosed. Noise level requirements Whether the installation is inside
or outside. Operating conditions of equipment
to be enclosed Inlet and Outlet piping size
Accessories
Engine Silencer Accessories
Accessories Continued
Warranty & Disclaimer
WARRANTY: Material and workmanship are guaranteed for one year from date of invoice. We will repair or replace any article proving defective when used for the purpose intended, but no claims for loss, damage or labour will be allowed.
Disclaimer: The warranty stated above is expressly in lieu of all other warranties ,expressed or implied, and in lieu of all other obligations and liabilities on the part of Stoddard Silencers of Canada Inc. that has been altered or repaired by others without its written authorization, nor to any product that has been subject to misuse, negligence or accident.
Contact Information
Contact information
Miguel Castro Regional Sales ManagerCanada & Latin America
(416) 291-4390 Toll Free 1-888-291-4390
miguel@stoddardsilencers.com
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