The PROBLEM

The engine is the major noise source on your boat generating various noises from the components and functions such as:

1- Combustion itself which causes vibrations of the engine structure, resulting in what is generally referred to as ‘combustion noise’ as well as vibration of the engine as a whole which transmits via the engine mounding to the boat resulting in structure-borne noises.
2- Air-bone noises from the exhaust and the inlet
3- Noises of mechanical origin (gears, mechanism of the valves etc) which are mainly air-borne noises.

The resulting noise from all these sources generally reaches such high levels those activities like listening to music, having a conversation or just relaxing have to be left after reaching destination.

Marine diesels create very high noise levels – often well over 100 decibels. Engines are always located close to the boat user, generally in engine spaces made from GRP, timber or steel. Engine noise is then amplified by bouncing around between the hard bulkheads and the steel of the actual engines. Noise contributes seriously to fatigue and seasickness, as well as spoiling life on board.

Noise insulation changes all this. It adds a soft facing to hard bulkheads to absorb noise and stop it bouncing around and growing. It adds weight to the bulkhead to reduce noise transmission. It features a clever multi-layer construction to make a thin material more effective than simple insulations many times thicker.

If you cocoon the engine with noise insulation you can reduce airborne noise by 85% and transform the comfort for all on board.

Marine diesels are more of a problem than vehicle engines, because a marine engine shares the hull with you. The insulation you use, therefore, has to be much more effective. The key to Procell Noise Insulation materails that specially recommended for marine industry lies in its multi-layer construction. Procell insulation materials has four layers.

The protective facing: Each with important functions acts as a heat reflective/resistant surface and provides easy clean surface that is oil and dirt resistant
The absorption layer: A thick layer of fire zero rated foam which soaks up noise and stops it bouncing around the engine space.
The transmission layer: A high-density barrier provides the highest possible mass and gives the best noise reduction. A high-density barrier provides the highest possible mass and gives the best noise reduction. 4kg per sqm vinyl and 6,5 kg per sqm lead sheets are used.
The isolation layer: This thin layer of foam has a crucial function: it acts like the gap in double glazing and stops the noise which hits the transmission layer being carried through to the bulkhead – just like the gap in double glazing

 

The foam is available with a pressure sensitive adhesive for an easy peel and stick application.22 thickness offers around 12dB (22 dB for Lead –Pb Barrier) reduction at 1000Hz and above, but its efficiency reduces with the heavier noises of lower frequencies. The overall reduction will give excellent results with smaller, lighter engines.The 33mm materials offer a startling 15dB (25 dB for Lead –Pb Barrier) reduction at 1000Hz. Noise doubles every three decibels, so this is nearly three times as good as the 22 mm. It also holds a good performance at lower frequencies, making it excellent with larger engines.The 52mm materials are even more effective than the 33mm, a 3dB improvement equating to a further doubling of the noise loss that can be expected.

The SOLUTION
As appropriate sound-isolating installation using EKSEN products, because:
- Procell offers the maximum noise isolation with a wear-free performance
- Procell offers the maximum fire resistance
- Procell is very easy to install since there is no need of special tools or technical expertise.
- Procell increases the value of your boat over and above the cost of its installation
- There is always an appropriate EKSEN product for every need.

AREAS OF APPLICATION
a) Insulating of machinery compartmentsBy using Procell sheets fully cover the compartment’s inner surfaces making an effort to minimize air gaps
b) Noise insulation of ventilating ducts
c) Noise insulation of compartments
d) Noise insulation of generator rooms

APPLICATION

 

 

1- Preparation of the surfaces of application
a) Metals (steel, aluminum etc) must be free from grease, oil, dirt.
b) Painted or polished surfaces, plywood, fiberglass and plastic surfaces, rub with sand paper, remove dust.
2- Cut the foam using a sharp blade
3- Gluing
a) Apply Profix to both surfaces using a brush
b) Wait for the glue to set (according to the instructions)
c) Press firmly for about 15 secondsGlue the foam pieces together at the edges for a better noise insulation result.










Specifications

Coating alternatives:
1. Aluminum Foil30 m, resistant up to 250 °C
2. E-Glassfabric style 1 side polyurethane coated 430 gram/m2, resistant up to 550ºC
3. E-Glassfabric 1 side Aluminium Polyester foil, 430 gram/m2, resistant up to 550ºC
Foam : Flame Proof Acoustical Foam, Density 70±5kg/m3. Meets BS 476 Part5, Part 6 and Part7, Class 0. Burning rate is 0 mm/min. No drop.
Barrier : Vinyl sound reflecting layer weight is 4 kg/m2
Lead sound reflecting, weight is 6,6 kg/m2
PSA : Self Adhesive Tape

Dimensions : 580 mm x 980 mm or as required.