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FUEL FILTER MAHLE COM plus

RELIABLE EFFICIENCYSYSTEMATIC FUEL FILTRATION


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highly viscous fuels, including middle distillates

and bio diesel, even at temperatures exceeding

160 C. The cleaning and discharging of filtered

solids into the sludge tank is effected without

affecting the throughput rate and the servicepressure by means of an intelligent filter control.

The flush volume is reduced to a minimum by the

geometric volume of the compensator. The COM

plus thus ensures a constantly high efficiency of

the drive unit.

The fil tra tion of fuel, par ticularly when using

heavy oil (DMC), places high demands on the

cleaning efficiency and throughput of the filter.

The COM plus fuel filter is specifically designedfor the large engines sector and is used for

cleaning fuel for big pistons. The COM plus is

based on a proven flush nozzle principle and

enables to be flushed without a pressure drop

and without affecting the efficiency of the pro-

cess. The COM plus can be used for all kinds of

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MAHLE BACK-FLUSHING FILTERSTRIED AND TESTED FOR MANY YEARS, SEAWORTHY AND EFFICIENT

MAHLE : Fuel filtration solutions

Series MAHLE COM plus MAHLE COM plus with manual by-pass filter and

change-over element

Description Fully automatic back-flushing filterwith tempered own medium

Fully automatic back-flushing filterwith tempered own medium

Nominal width of connecting flange DN 25DN 100 DN 25DN 100

Housing material GGG 40 GGG 40

Service pressure Up to 16 bar Up to 16 bar

Max. service temperature 160 C (*higher temperatures on request) 160 C (*higher temperatures on request)

Filter element Pleated single or double insert Pleated single or double insert

Max. filter fineness 10 m (different filtration ratings) absolute 10 m (different filtration ratings) absolute

Back-flushing control Differential pressure-dependent; by time interval Differential pressure-dependent; by time interval

Options Integrated heating (steam/thermal oil) Integrated heating (steam/thermal oil)


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MAHLE COM plus

Filtration

The medium being filtered flows

at service temperature via the fil-

ter inlet (1) of the heated filter

housing into the filter insert (2) of

the automatic filter. This compri-

ses a cylindrical single or double

body, in which the pleated wire

cloth cylinders with the specified

filtration fineness are located.

Any part icles in the medium are

deposited on the outside of the

inner filter or on the inside of the

outer filter. The cleaned fuel

flows into the clean section and

flows out of the filter housing via

the outlet connection (3). As theamount of contamination on the

wire cloth increases, the diffe-

rence between the inlet pressure

(contaminated side) and outlet

pressure (clean side) also rises.

This differential pressure is mea-

sured by pressure transmitters at

the inlet and outlet and is trans-

mitted to the filter control. The

programmable logic controller

(PLC) automatically triggers the

back-flushing cycle once a pre-

defined differential pressure or

time interval is reached.

Backwashing

On reaching a maximum diffe-

rential pressure or a preset time,

the cleaning cycle is triggered.

The cleaning nozzle or the filter

insert is set in motion (rotation)

by the gear motor (4). At the

same time, a 3-way flush valve (5)opens and connects the dirty

side of the compensator to the

flush channel.

While the sludge is sucked into

the dirty side of the compen-

sator (6), the corresponding

amount of clean, heated fuel is

simultaneously pushed through

the filter mesh at high velocity.

The cleaning process, which

occurs in the opposite direction

to the filtration process, removes

the dirt particles collected on the

filter mesh (7). The filtration pro-

cess itself remains uninterrup-

ted. Upon completion of the

backwashing cycle, the flush

valve closes again, such that the

dirty side is connected back tothe pressure-free sludge tank (8).

To prepare the next cleaning

cycle, the compensators drive

slowly empties the dirty side and

simultaneously fills the clean side

with cleaned fuel, with no signifi-

cant pressure loss.

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5

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3

8

2

4

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Phase 1:

Filtration

Phase 2:

Back-flushing cycle

Phase 3:

Compensator charging

and draining of sludge

into the sludge tank

MAHLE Industriefiltration provides customerswith a special innovation for fuel filtration: the

MAHLE COM plus filter combination is the most

reliable way to filter fuel and has the following

advantages:

None of the medium escapes when the flush

volume is transferred from the clean side of the

compensator to the contaminated side. This

means there is no pressure drop.

MAHLE filters have proved their efficiency andoperational reliability in 10-micron filtration for

many years. The flush volume (filtered medium)

stored in the compensator is kept at operating

temperature until the back-flushing cycle takes

place.

The back-flushing process uses the plants own

medium (filtered medium) at operating tempera-

ture. This prevents the wire cloth from sticking

together, which can occur in back-flushing pro-

cesses conducted with foreign media (e.g.

compressed air) as a result of possible tempe-

rature differences.

Due to extensive quality tests (in our own lab

and external labs and institutes), we can gua-

rantee that in the event of the fuel treatment

system (separator) failing, the MAHLE COM

plus can take over the task of cleaning the

medium for up to 12 hours without the wire

mesh being destroyed.

Furthermore, in exceptional cases the filter can

be started up at bunker temperature an

increased resistance due to a lower fuel visco-

sity can be offset by the MAHLE COM plus.

And in a final step, maintenance of the filter is

quick and simple as only 1 or 2 wire mesh cylin-

ders have to be replaced.


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Reliability down to the finest detail

MAHLE fuel filters are particularly suited to pro-

ving their reliability on board. Thanks to their per-

fect filtration performance and undisturbed ope-

ration, our products are especially popular in

shipbuilding. However, power stations have also

been using our fuel filtration systems for several

years.

Performance through cleanliness

The eff iciency and profi tabi lity of large engines in

the marine industry or in combined heat andpower stations is largely dependent on their con-

tinuous operation. The cleanliness of the fuel that

is supplied to these engines constitutes an extre-

mely important factor with regard to their service

life. This is because one of the main causes of

defects and failures is the premature wearing of

components as a result of dirt in the system.

The problem here is that the quality and impuri ty

of diesel on the market varies greatly, ranging

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A SYSTEM THAT GUARANTEES RELIABLE ENGINE OPERATION

from marine diesel to heavy fuel oil. The worse

the quality, the higher the susceptibility to faults

and the higher the wear rate for the engines.However, there is a way to counteract this: The

filter performance must be that good that even

diesel of the worst quality can be made eminently

usable. MAHLE supplies fuel filtration systems

that are optimized to deal with the requirements

of large engines. This is particularly important in

the marine industry: MAHLE automatic filtration

systems also operate reliably and safely in fully

automatic operation.

All MAHLE fi lters and accessories are extremely

robust and boast impressive service lives. They

require minimal maintenance and have a com-

pact design. MAHLE offers customers an exten-

sive range of services all over the world. The

companys extensive network of agents ensures

that customers are helped by competent engi-

neers and technicians wherever they are. Expe-

rienced service teams are available for commis-

sioning and maintenance tasks worldwide.

MAHLE FUEL FILTERS


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MAHLE Industriefiltration GmbH

Schleifbachweg 45

D-74613 hringen

Phone +49 7941 67-0

Fax +49 7941 67-23429

[email protected]

www.mahle-industrialfiltration.com EN

70529563.0

8/2012

www.mahle-industrialfiltration.com

fuelfiltration en

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