Marine High Speed Oil centrifugal separator - Marine Oil Separator - Hi-sea

Marine High Speed Oil centrifugal separator

Marine High Speed Oil centrifugal separator

Marine High Speed Oil centrifugal separator

1. Marine High Speed Oil centrifugal separator Application
    The marine high speed oil centrifugal separator is intended for marine applications. It is specifically designed for cleaning of mineral oils from water and solid particles (sludge). The cleaned oil is discharged continuously, while the sludge is discharged at intervals.
    The separator handles the following types of lubricating oils and low viscosity fuel oils:
    Distillate  (viscosity 1.5-5.5 cSt/40℃)
    Marine diesel oil  (viscosity l3 cSt/40℃)
    Intermediate fuel oil and heavy fuel oil  (viscosity 30-380 cSt/50℃)
    Lubricating oil of R & O type, detergent or steam turbine.
    The separator can be operated either as a purifier or as a clarifier. When operated as a purifier the separator discharges the separated water continuously.
    When the oil contains only small amounts of water the separator is operated as a clarifier, discharging the water together with the solid particles.
    The separator has to be installed together with devices for control of its operation.
2. Design of Marine High Speed Oil Centrifugal Separator
    The marine oil separator comprises a frame consisting of the frame lower part, the intermediate part and the frame top part with a frame hood.
    The separator bowl is driven by an electric motor via a flat-belt power transmission and bowl spindle. The motor drive is equipped with a friction coupling to prevent overload.
    The bowl is of disc type and hydraulically operated at sludge discharges. The hollow bowl spindle features an impeller which pumps closing water from a built-in tank to the operating system for sludge discharge.
    The main inlets and outlets are shown with their connection numbers in the illustration.
3. Sludge Discharge Function of Marine High Speed Oil Centrifugal Separator
    Sludge is discharged through a number of ports in the bowl wall. Between discharges these ports are covered by the sliding bowl bottom, which forms an internal bottom in the separating space of the bowl. The sliding bowl bottom is pressed upwards against a sealing ring by force of the closing water underneath.
    The sliding bowl bottom is operated hydraulically by means of operating water supplied to the discharge mechanism from an external freshwater line. Opening water is supplied directly to the operating system in the bowl while closing water is supplied to the built-in closing water tank, and pumped to the operating system through the bowl spindle.
    The opening and closing only takes a fraction of a second, therefore the discharge volume is limited to a certain percentage of the bowl volume. This action is achieved by the closing water filling space above the upper distributor ring and pushing the sliding bowl bottom upwards. Simultaneously, the water in the chamber below the operating slide is drained off through the nozzles in the bowl body.
    Bowl opening
    The key event to start a sludge discharge is the downward movement of the operating slide. This is accomplished by supply of opening water to the discharge mechanism. Water is drained off through nozzles in the bowl body. The sliding bowl bottom is rapidly pressed downwards by the force from the liquid in the bowl, opening the sludge ports.
    Bowl closing
    After the sludge is discharged the sliding bowl bottom is immediately pressed up and the sludge ports in the bowl wall are closed.
4. Marine High Speed Oil Centrifugal Separator Technical Parameter
    The technical parameter is optional, we can accommodate your requirements, please don’t hesitate to contact us!

Maximum density





Power consumption


0.9 kW


running (at max. capacity)

2.0 kW


max. power consumption

2.8 kW (at starting-up)

Bowl speed,        



rev/min. 50Hz/60Hz

Motor speed, synchronous


rev/min. 50Hz/60Hz

Gear ratio (pulleys)

130:41 (50 Hz)



106:41 (60 Hz)


Starting time

3.5 – 4.5 minutes


Stopping time

Running down without brake

average 19 minutes


With brake

min. 3 max. 4 minutes

Maximum running time without

Empty bowl

180 minutes


Filled bowl

180 minutes

Sludge volume total/efficient

1.0 / 0.3 litres


Bowl liquid volume

2.2 litre


Bowl inner diameter, max

218 mm


Fixed discharge volume

1.2 + 0.1 litres


Lubricating oil volume

0.5 litre


Sound pressure level

75 dB(A)


Sound power

8.9 Bel(A)


Vibration level

New separator

Max. 5.6 mm/sec


Separator in use

Max. 9 mm/sec


Separator without motor

Net weight approx. 193 kg



21 kg


Complete bowl

37 kg

Motor power

3 Kw


5. Marine High Speed Oil Centrifugal Separator General Drawing

6. Certificates of Marine High Speed Oil Centrifugal Separator: ABS, BV, DNV, GL, KR, RINA, NK, LR and CCS approvable.

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