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GRP
dual chamber lift silencers - "HYDROLIFT
- DUAL" AI/AO (ANGLED IN/ANGLED OUT)
series
Dual chamber silencers
are the most effective wet-exhaust silencers
on the market today. Exhaust noise reductions
of up to 80% can be achieved and the back
pressure created by the unit is minimal.
Units may be hand-built with different
inlet and outlet positions to suit the
particular Customer specifications. Each
silencer is fitted with two drain plug
in order to evacuate from the chambers
remaining water when garaging of the boat
at the end of season is needed.
On request, they may be fitted with a
threaded thimble placed on the inlet pipe,
eventually to fit an "HYDROALARM"
exhaust temperature alarm system sensor.
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GRP
rectangular top inlet top outlet lift
silencer - "HYDROLIFT - COMPACT"
TI/TO (TOP IN/TOP OUT) series
Rectangular lift silencers
represents the most recent answer to the
narrow space problems in the engine comparment
of the sailing yachts, where the muffler
is placed nearby the auxiliary engine
alongside the propeller shaft. Units may
be hand-built with different inlet positions
to suit the particular Customer specifications.
Each silencer is fitted with a drain plug
in order to evacuate the remaining water
when garaging of the boat at the end of
season is needed.
On request, they may be fitted with a
threaded thimble placed on the inlet pipe,
eventually to fit an "HYDROALARM"
exhaust temperature alarm system sensor.
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GRP
in-line silencers - "HYDROLINE"
series
These low lying units
can be very useful in sailing yachts,
where the silencer needs to be placed
along the propeller shaft. In order to
fit them, it is advisable to follow the
mounting instructions, enclosed to each
delivered unit. Each silencer is fitted
with a drain plug in order to evacuate
the remaining water when garaging of the
boat at the end of season is needed. On
request, they may be fitted with a threaded
thimble placed on the inlet pipe, eventually
to fit an "HYDROALARM" exhaust
temperature alarm system sensor.
All the acoustic and corrosion resistance
specifications remain the same as the
vertical silencer types, included the
strict quality control tests.
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AISI
316L (EN 1.4432) stainless steel/reinforced
rubber in-line silencers - "HYDROLINE
- SSR" series
The stainless steel/rubber
in-line silencers in the “HYDROLINE
– SSR” series, offer resistance
and durability characteristics that compare
with constructions in GRP. They are also
characterized by some special details,
which make them “state-of-the-art”
constructions, such as the internal check
valve placed into the inlet pipe to avoid
water running back up the exhaust; a threaded
thimble placed on the inlet pipe, eventually
to fit an exhaust temperature sensor;
the AISI 316L stainless steel bottom end
caps, equipped with a drain plug in order
to evaquate the water remaining inside,
when garaging is necessary at the end
of the season; the silencer body made
of reinforced rubber (R.I.Na. approved),
resistant to high temperatures and corrosion;
AISI 316L stainless steel adjustable feet
and other items.
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GRP
water separators - "HYDROSEP"
series
The installation of
a water separator into an exhaust system,
in order to replace the gooseneck, removes
water once it has done its cooling and
silencing job, draining this quietly away
below the waterline. The irritating noise
of water "sploshing" outboard
from the transom outlet is removed completely.
They are designed for engines ranging
from small diesel generators through to
main engines installed on superyachts
and commercial craft. Back pressure is
minimized.
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GRP
silencers in combination with water separators
- "HYDROCOMBISEP" series
GRP silencers in combination
with gas/water separators take part of
a new generation of products. These separators
utilize gravity and centrifugal force
to separate exhaust gas from cooling water.
It is most advantageous on those propulsion
engine installations where there are problems
with routing the exhaust piping through
interior structures with a constant downward
grade for draining.
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AISI
316L stainless steel (EN 1.4432) water
injection elbow (riser) - "TMS"
(TWIRL MIXER SYSTEM) series
Many engines have
a standard water spray head for cooling
the exhaust's gases. When the engine is
only just above the waterline, the exhaust
hose path from the engine to the transom
is nearly flat. Water could run back into
the engine if the vessel pitches on its
mooring, or a wave could do the same.
An "high riser" is then needed
on the engine and "TWIN MIXER SYSTEM"
rises can help. Water injection elbow
with particular spray patterns, for installations
where cooling is critical, may be also
produced on request. High risers have
a carefully calibrated sequence of water
spray slots sized to make water jet into
the exhaust gases at full power (but not
only) to maximize the cooling effect.
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Exhaust
reinforced rubber hoses (R.I.Na. approved)
- "HYDROHOSE" series
These wet exhaust hoses, R.I.Na. (Italian
Naval Registry) approved, are made of rubber
and are reinforced with high tensile textile
cords and with embedded steel helix wires
reinforcements. On the inside they are lined
with a PVC layer that is resistant to high
temperatures, abrasion, corrosion by acids
and hydrocarbons with up to 50% aromatic
content. In order to prevent exhaust leakages
from the junctions, it is advisable to carry
out connections with other components (rises,
silencers, gas/water separators and exhaust
thru hulls) by inserting the hoses for a
length at least equal to one diameter and
then fastening them with at least two hose
clamps of the “HYDROTIGHT” series
to each end.
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Transom
mount exhaust thru hulls in AISI 316L stainless
steel (EN 1.4432) equipped with check valve
– “HYDROTRANSOM” series
Transom mount exhaust outlets in the prestigious
“HYDROTRANSOM” series are entirely
made of first-class AISI 316L stainless
steel. They are tough structures characterized
by a refined aesthetic style with high quality
finishing, which will not fail to please
shipyards and the most demanding Customers.
All thru hulls are equipped with a flapper
check valve in corrosion-resistant rubber.
They come in a wide range of inlet outside
diameter sizes for connection to exhaust
rubber hoses and shapes as well, whether
with straight or inclined flange, and finished
with protruding tail pipes with inclined
or curled rim - to avoid dirtying the hull
– in order to adapt to the wide variety
of both aesthetic and installation requirements
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AISI
304 stainless steel (EN 1.4432) hose clamps
- "HYDROTIGHT" series
In order to obtain a perfect fastening between
the exhaust hoses and the other components,
it is advisable to install reinforced hose
clamps in AISI 304 stainless steel in the
"HYDROTIGHT" series, that are
available in a wide range of diametre sizes
covering the whoole outside diametre sizes
of the exhaust rubber hoses in the "HYDROHOSE"
series. In order to prevent exhaust leakages
from the junctions, it is advisable to carry
out connections with other components (rises,
silencers, gas/water separators and exhaust
thru hulls) by inserting the hoses for a
length at least equal to one diameter and
then fastening them with at least two hose
clamps of the “HYDROTIGHT” series
to each end
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AISI
316L stainless steel (EN 1.4432) 45 degree
bends - "HYDROPIPE-SS-BEND 45"
series
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AISI
316L stainless steel (EN 1.4432) 90 degree
bends - "HYDROPIPE-SS-BEND 90"
series
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Special
rubber or silicone flexible exhaust bellows
- "HYDROFLEX" series
In order to isolate engine vibration from
the exhaust system, particularly where a
silencer or rigid section is close to the
engine, it is advisable to fit these special
rubber or silicone flexible bellows.
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Dry
silencers in AISI 316L stainless steel
(EN 1.4432) – “DRYLINE”
series
The high efficiency
silencers in the “DRYLINE”
series, entirely made of first-class AISI
316L stainless steel, can be installed
on all marine exhaust systems where engine
gases are not cooled by means of mixing
with cooling water. They come with a connection
system to the other parts of the system
using flanges or more simply using pipe
couplings connectors to be fastened with
clamps. They are also available with inlet
and outlet in line with the silencer axis
or with the inlet positioned at the side,
to comply better with the numerous installation
conditions that may be present inside
the engine compartments.
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Contraction/expansion
joints in AISI 321 stainless steel for dry
exhaust systems – “DRYFLEX”
series
Stainless steel contraction/expansion
joints are nearly always a compulsory solution
when it is necessary to insulate the rest
of the exhaust system from engine vibrations
for dry installations, where high temperatures
are reached along ducts.
These contraction/expansion joints are made
of multiple layers, also available with
an internal steel mesh reinforcement, which
are mainly produced according to Customer
specifications. On request all the other
components needed to complete a dry system
can also be produced, such as flanged pipes,
flexible pipes with pipe couplings connectors,
and contraction/expansion joints equipped
with flexible steel bellows, all manufactured
using CAD techniques and strictly in first-class
AISI 316L stainless steel.
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Exhaust
temperature alarm system - "HYDROALARM"
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