This section should enable you to visualize the components in the ALCAP
lubricating oil system
click the parts to get more detailed information emergency stop button this
should be used in the event of high vibrations heat pack power unit this
contains the main fuses and the contactors which are controlled from the
EPC separator and pump starter the starter is used to start the separator
and the pump EPC 400 supervision and controller the EPC 400 is a dedicated
microprocessor based supervision and control unit header tank for operating
water this tank stalls the low pressure operating water for closing the bowl the
tank is positioned such that the water level in the tank is between two point
two and three point two meters above the connections on the side of the separator
water valve block both if operating and the conditioning / displacement water
are supplied from this valve block the operating water is used for opening and
closing the separator bowl and the conditioning / displacement water is
used inside the bowl solenoids are activated by the EPC 400 I'll cap
separator from the outside the LM px looks different to the FO px it only has
two pumps oil inlet and oil outlet transducer mt 4 this is the primary
supervisory component within the L cap system this unique device continually
monitors changes in the condition of all the clean oil leaving the separator high
and low pressure switches and pressure gauge
under normal conditions cleaned oil is pumped away from the separator by the
pairing disc in the oil complet on the top of the separator a positive pressure
will be indicated by the pressure gage the actual value depends on the
downstream pressure we call this P min there is also a maximum pressure at
which the bolt overflows we call this P max the back pressure regulating valve
is used to set this pressure midway between P min and P murk's as a guide
this figure could typically be 1 point five to two point zero bar the
high and low pressure switches can now be set to either side of the typical
figure so as to give warnings should there be a deviation of the oil output
from the separator flow indicator it should be stressed that this is a flow
indicator and not a flow meter recirculation valve pneumatic 3-way
valve v1 when the valve is de-energized oil flows in at the side and out at the
bottom and is then recirculated back to the sump tank as an alternative it can
also recirculate to the clean oil outlet the three-way valve is air activated
when activated the valve spindle and plug move downwards allowing oil to pass
through and on to the separator one of the main control functions of the system
is to recirculate oil away from the separator in the event of an abnormal
situation note there is one situation when oil is to flow to the separator
during an abnormal condition namely during an emergency stop slashed
vibrations recirculation valve pneumatic three-way valve v1 when the valve is
de-energized oil flows in at the side and out at the bottom and is then
recirculated back to the sump tank as an alternative
it can also recirculate to the clean oil outlet the three-way valve is air
activated when activated the valve spindle and plug moved downwards
allowing oil to pass through and onto the separator one of the main control
functions of the system is to recirculate oil away from the separator
in the event of an abnormal situation note there is one situation when oil is
to flow to the separator during an abnormal condition namely during an
emergency stop / vibrations high and low pressure switches and pressure gauge
under normal conditions cleaned oil is pumped away from the separator by the
pairing disk in the oil outlet on the top of the separator a positive pressure
will be indicated by the pressure gage the actual value depends on the
downstream pressure we call this theme in there is also
maximum pressure at which the bolt overflows we call this P mercs the back
pressure regulating valve is used to set this pressure midway between P min and P
Max as a guide this figure could typically be one point five to two point
zero bar the high and low pressure switches can now be set to either side
of the typical figure so as to give warnings should there be a deviation of
the oil output from the separator the oil viscosity should be low prior to
entering the separator this gives better separation remember Stokes law the
recommended Inlet temperature is 95 degrees Celsius for trunk diesel engine
lube oil ninety degrees Celsius for crosshead diesel engine blow boil feed
pump a positive displacement pump gear or
screw type must be used a screw type pump from Alfa Laval is a good solution
strainer the purpose of the strainer is to protect the pump from any pipe or
tank debris it should be installed close to the suction side of the pump
pneumatic block valve this valve switches the air to activate the oil
recirculation valve