This section will make you familiar with the basic parts of the ALCAP fuel oil
separator bowl the function of the flow control disk the function of the oil
pairing disk the water pairing disk recirculation holes the water drain
valve and pressure gauge the interaction of the pairing disks the flow control
disk and the drain valve
the seven discs shown on the left side are gravity discs and the discs shown on
the right side is a flow control disc all of Rome machines of similar size
placement the flow control disk fits in a similar place in the uncap fuel oil
separator as the gravity disc does in a purifier center hole diameter the center
hole diameter in the flow control disk is comparable to the diameter of the
hole in a clarifier disc flow control hole the small hole is positioned
equivalent to the diameter of a large diameter gravity disc all the water
leaving the bowl through the water outlet line must pass through this flow
control hole the view shows closeup of oil pairing discs in cross-section oil
pairing chamber oil level ring oil pairing disc inner oil level initially
the inner oil level builds up in the bowl level ring the oil reaches the
level ring and then overflows into the powering chamber the level ring
determines the position of the inner oil level in the bowl powering chamber the
pairing chamber fills inwards edges of the pairing disc the oil level reaches
the top and bottom edges of the pairing disc and an air seal is made the oil is
not picked up by the pairing disc immediately as the outer diameter of the
volume is undercut the air seal is to prevent any air being pumped out with
the oil oil is picked up by the pairing disc the oil level moves inwards and the
disc pairs off the oil and discharges it down the oil outlet line summary the top
and bottom edges of the pairing disc will always be immersed helping to
prevent air from getting into the discharge line and eventually to the
transducer where it can interfere with the transducer valve the AL cap water
pairing disc has small on the underside these recirculate some
of the water back below the flow control discs this circulation helps control the
temperature in the water pairing chamber water drain valve v5 with the L cap fuel
oil separator the water drain valve is normally closed it is this closed valve
which makes the separator the clarifier it is pneumatically operated and
requires air to open pressure gauge the pressure gauge indicates the pressure in
front of the water drain valve this is normally a very low pressure how do the
bowl and the pairing disks work together in this system the description within
this section does not refer specifically to the FOP x61 one separator as the
water is added to the bowl in a different way
conditioning water is fed during the start process from the valve block by a
solenoid and v10 there is a flow orifice in the valve block this is sized
according to the separator model this fills the water pairing chamber and
moves down through the small hole in the flow control disc the mechanical
arrangement is slightly different with the FOP x61 one separator it can be
considered to be similar to the l opx dull cap loop oil separators which will
be described later the water continues downwards between the bowl hood and the
top disc until it reaches the sludge space at the bulb periphery here the
water level builds inwards until the solenoid MV 10 closes close solenoid
valve after solenoid MV 10 has closed the water is at the periphery of the
bowl there will also be a small amount in the water pairing chamber the
interface between the water and the oil is established the weight of the oil
pushes the water outwards and back up between the bowl hood and the top disc
the water goes back the oil continues to displace the water the water goes back
up through the hole in the flow control disc
begins to fill up the water pairing chamber water powering disc the water
level in the pairing chamber continues to move inwards until it is picked up by
the water pairing disc and pumped away the water cannot get out of the water
outlet as the drain valve is closed at this stage the interface is moved out
past the outer edge of the top disc in a purifier the bowl would now have lost
its seal and oil would also be lost the position of the interface is maintained
by the closed outlet valve circulation of water as the water cannot escape a
small circulation is established it follows the path from the bottom of the
water pairing disk to the underside of the flow control disc back up through
the flow control hole and into the pairing disk again this small
circulation prevents overheating in this area oil reaches the oil pairing disk
oil continues to be fed in and fill in words over the level ring until the oil
pairing disc picks it up and pumps it away when using EPC 400 generation 4
with EPC 400 generation 4 conditioning water is added after the oil feed is on
the end result is the same water at the periphery of the bowl to keep separated
sludge moist for a good discharge