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4.5 Exhaust gas outlet of the diesel pumps
WARNING
Toxic material
Death or serious personal injury
‐
All connections must be perfectly sealed in order to
avoid gas leakage inside the technical room.
‐
Check periodically the integrity of the exhaust pipe.
‐
The discharge of the exhaust pipe must be positioned
far from passage areas or areas where people are
stationed, in accordance with current regulations.
Surfaces may remain hot after the fire pump set has been shut off.
DANGER
Hot surface
Death or serious personal injury
‐
The exhaust pipe and the muffler must be insulated
and protected by materials suitable for high
temperatures, to avoid contacting with extremely hot
parts and to prevent heat from being released into the
technical room.
‐
Check periodically the integrity of the insulation layer.
‐
Do not touch the hot surface before it cools down.
‐
If it is not possible to wait, wear protective gloves.
The design and installation of the exhaust pipe must be
carried out by a qualified designer, appointed by the client,
in accordance with local regulations.
Incorrect sizing of the exhaust pipe can cause the fire
system to fail.
The exhaust gas duct must be:
•
arranged to allow the gas to exit outdoors directly or through a
pipe, depending on the regulations in force at the place of
installation
•
protected from weather conditions
•
positioned so that they do not disturb people or damage any
equipment
•
made of steel, sufficiently strong and perfectly sealed.
•
installed properly so that all the parts including the muffler are
firmly supported without an extra load on the engine.
If the muffler is directly mounted on the engine, use
a flexible joint to connect the exhaust outlet pipe to avoid
any mechanical stress on the engine.
Due to thermal expansion of the exhaust gas ducts, we recommend
to use compensation joints suitable for the application.
A suitable condensation collection and a drain point is also
required.
14
4.6 Exhaust back pressure
Wrong sizing of the exhaust pipe can affect correct
operation of the pump set.
As previously stated, the exhaust gases must be discharged from
the installation room avoiding long ducts. Long ducts create a high
back pressure, this makes the discharge of the gases difficult and
reduces the efficiency of the engine.
After having followed all the precautions for discharging the exhaust
gases in an optimum manner, it is necessary to check the back
pressure value at the exhaust by measuring it under the
following conditions:
•
with the exhaust gas system in its final configuration
•
after warming up the engine
•
at full load
•
at the nominal speed of the engine defined for the specific
model.
The resulting value cannot be greater than the maximum value
recommended by the manufacturer of the engine.
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