Why use fiberglass reinforced plastics to make wet marine mufflers? FRP
will not corrode or deteriorate when exposed to gasoline or diesel
fumes mixed with salt or fresh water. Electrolysis and welds in
stainless steel, which often cause early failure, are eliminated.
Resistance to higher temperatures will not result in warping or melting
often observed in some rubber or plastic mufflers.
The right muffler for any given vessel should be determined by answering the following basic questions:
1. Engine location, 2. Exhaust System Size, and 3. Noise Reduction
1. ENGINE LOCATION
Engines located at or below the loaded water line (LWL) require some
type of a lift muffler, (
Vernalift). Engines located aft or mid ship
and above the LWL can utilize a muffler of the
Vernatone family.
2. EXHAUST SYSTEM SIZE (Diameter)
Larger engines with higher horsepower require larger diameter exhaust
systems and more space. The muffler and accompanying tubing, hose and
fittings must be large enough to carry the cooling water and gases
through the system without creating back pressure in excess of the
engine manufacturer’s recommendations. Centek’s engineering expertise
assures accurate sizing.
3. NOISE REDUCTION
Muffler size and internal design will determine the amount of noise
reduction achievable in a given installation. Larger mufflers normally
provide better silencing than small mufflers. Space limitations for
installations will often determine the size and type of muffler that
can be used.
EXHAUST SYSTEM SIZE
The size of the wet marine exhaust muffler is determined by the engine
size (H.P.) and the engine manufacturer’s allowable back pressure.
Diesel engines are particularly sensitive to back pressure.
If you have any questions or need help, call Centek Industries at
800-950-7653. The following table is for general recommendations only:
NOTE: For V-Block engines where twin exhaust lines are desired, divide
the H.P. by two and then match to the appropriate size.
The attenuation
curves as shown are typical only for the products as shown and meant to
display their comparative acoustical properties. Actual results will
depend highly on the engine to which the product is applied and the
operating parameters of that engine.
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