Hose Connections - Vetus NLPG40 Instructions D'installation

Introduction
The Vetus exhaust system components are especially suit-
able for use in water-injected exhaust systems.
The maximum continuous operating temperature of the
plastic components of the exhaust systems is 70 degrees C
(158 degrees F).
• Fit a temperature alarm to warn of excessively hot
exhaust system temperature.
• If the quantity of injected coolant water is reduced
to in order to lower back-pressure in the exhaust
system, check that there is still sufficient water
injected when the engine is ticking-over. This will
prevent excess temperatures in the exhaust sys-
tem.
• Excess temperature can also be the conse-
quence of insufficient mixing of coolant water with
the exhaust gasses.
In general, good mixing is obtained by a virtually
vertically installed exhaust injection bend.
Poor mixing can also occur with an engine on
tick-over; especially when the coolant water injec-
tion bend is installed virtually horizontally.
If necessary, take action. For example; by fitting
a water vortex or a water splitter in the exhaust
pipe, to improve the mixing of coolant water with
the exhaust gasses.
With water-injected exhaust systems, fit a hose of suitable
quality.
This hose must be reinforced, resistant to exhaust gasses,
high temperatures (100 degrees C, 212 degrees F) and oil.
Easy flexibility is essential for installation, while the hose
must not collapse when heated.
Vetus exhaust hose fulfils all the above requirements.
WARNING
If water enters the engine from the exhaust silencer
into the exhaust system (for example: under sail
when the ship rolls or pitches heavily) this will lead to
irreparable damage to the engine.
Too much water in the silencer can effect engine
starting; drain off this water first. Too much water in
the silencer can be also caused by repeated starting
attempts while the engine refuses to start.
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030414.02 030428.02
Installation
Installing goose neck NLPG
Fit the goose neck in such a way that its top is at least 45 cm (18")
above the waterline, see drawing. In a sailing ship, the goose neck
should be installed as close to midships as possible.
MIN. 45 cm
(18")

Hose connections

In order to achieve the ideal connection between the hoses and the
goose neck, both hose connections turn through 360 degrees.
NLPG40
NLPG45
NLPG50
NLPG60
NLPG75
NLPG90
Loosen the bolts before turning the hose connections!
Tighten the hose connections to a torque of 1 Nm (0.74 ft-lb,
142 oz-in).
MIN. 45 cm
(18")
Goose neck NLPG