Within an engine room, Centek Marine offers both exhaust and ventilation systems.
The primary purpose of a marine engine room exhaust system is to safely move combustion by-products out through a tight space as efficiently as possible without creating too much backpressure.
Wet Exhaust
Wet exhaust is the process in which the cooling water is injected into the exhaust line, reducing both the temperature of the gas along with the accompanying fumes. Wet exhaust systems have the advantage of using the heat-absorbing and sound-dampening qualities of water to cool and quiet the exhaust. It also transports raw water or sea water and protects the engine against water entry. Centek Marine offers both propulsion and generator exhaust.
Propulsion Exhaust
With propulsion exhaust, gases directly from the engine reaching up at 1,000 degrees Fahrenheit are carried in a metal riser and injected with cooling water. The cooled water then goes into a muffler that is specifically engineered to attenuate the sound produced by the engine while balancing backpressure allowances specified by the engine manufacturer.
Generator wet exhaust systems connect with the generator and can be installed below, at, or above the waterline.
Built to Last
Centek Marine mufflers are manufactured using fiberglass reinforced plastics, as FRP will not corrode or deteriorate when exposed to gasoline or diesel fumes mixed with salt (or fresh) water, like many metal applications, nor will warp or melt, which is often observed in rubber or plastic mufflers. Centek Marine Mufflers are available in a variety of standard finishes, including white and black gel coat and yacht quality. We can also do any custom color or finish you would like.
The Vernatone® family of inline exhaust mufflers are the original FRP water-cooled marine muffler.
This style has been used for over 60 years and includes eight basic products with hundreds of variations already available in our catalog. The Vernatone® muffler was originally designed for small auxiliary propulsion engines installed near or below the waterline in sailboats. Over 50 years ago, the quieting capabilities of lift mufflers were recognized. Today, there are hundreds of Vernatone® options available, including new or larger engines.
In the 1970s, the quieting capabilities of the lift mufflers were recognized, and Centek Marine pioneered the Vernalift design.
Vernalift Mufflers are best suited for exhaust systems that require engine gases to be “lifted” above the waterline to be drained. Today, the Vernalift line of products has expanded to included new and larger engines. it is the industry’s best lift muffler and meets or exceeds the requirements of the ABYC P-1 Standards. Custom sizes and inlet/outlet configurations are available on all products.
Gas/water separation mufflers were developed in response to the needs of more complex vessels.
These separation systems are very effective where engines are located amidships or well forward in the hull and extremely effective in reducing exhaust noise. Gep-Seps® and Combo-Seps® are included in this family of products.
The patented Combo-Sep® combines a Vernalift® muffler and a highly efficient gas/water separator into a single space-saving unit.
The Combo-Sep® is excellent for mid-range generators and propulsion engines installed amidship or forward. Centek Marine recommends the Combo-Sep® for above waterline installations for maximum silencing and excellent water separation.
Underwater exhaust mufflers, as the name implies, were designed specifically for use with underwater exhaust systems.
This design combines Centek’s experience in muffler design with all the benefits of an underwater discharge, including the elimination of the exhaust gases flowing back into the boat. Another benefit is the elimination of engine exhaust deposits staining the exterior surfaces of the boat.
Vernatube® is a resin-impregnated glass filament wound tubing made exclusively with a fire-retardant resin formulated for high-temperature applications.
Centek Marine uses the fire-retardant Vernatube to fabricate many of the basic wet marine exhaust components. Vernatube exceeds values for the class of materials designated as ‘self-extinguishing’ per ASTM D-635, UL94V-0, and the US Navy/USCG MIL-R-21607 and MIL-R-7575. All tubing products may be factory machined to fit exact hull dimensions.
Exhaust Fittings
Exhaust systems fittings are made of the same fiberglass and fire-retardant resin used to produce Vernatube. The fittings are lightweight, strong, non-corroding, and durable. Fittings are easy to install and O.D.’s are compatible with approved marine rubber exhaust hoses.
Exhaust Accessories
Metal Risers are manufactured using a 316 stainless steel alloy that is corrosion and chloride stress cracking resistant.
They are either wrapped in a hard coat and cured in an oven or wrapped in heat-resistant blankets to protect against the high temperatures. All components are designed and welded in-house by our experienced engineering and manufacturing teams.