F-152
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Fuel oil filter – F-152 range Continuously automatic backflushing fuel oil filter The F-152 automatic filter range provides full-flow fine filtration of heavy fuel oil (HFO) up to 700 cSt/50°C. Developed to cover all the requirements of modern two- and four-stroke engines, the F-152 requires minimal investment yet delivers highly reliable operation and true peace of mind. Unique features • Robust disc-type filter elements. • Continuous backflushing driven by the filtered oil. • Constant pressure drop across the filter. • Filtered oil drives the backflushing process. • Compact and lightweight. • Cleaning of the backflushed oil by refiltration in the diversion chamber before recirculation in the system. • Removal of particles collected from the system at the filter. Key benefits • Robust design reduces risk of the filter element cracking. • Continuous backflushing significantly prevents adhesion of retained solids to filter surfaces, which results in: – No manual cleaning of filter elements. – Low and constant pressure drop across the filter elements, which further reduces the risk of cracking. • Use of filtered oil for the backflushing process eliminates the need for compressed air. • Installation is recommended on the circulation side (hot loop) of the fuel oil system for maximum engine protection. The robust design and elimination of colder backflush media prevents thermal shock which can result in the formation of asphaltenes. • Constant pressure drop across the filter, combined with the pressure drop indicator, facilitates the detection of a malfunction in the fuel oil system. • Cleaning of backflushed flow enables recirculation of fuel and reduces sludge volume to a minimum. Automatic fuel oil filter shown with electrical motor. • It is easy to install in new fuel oil systems and to retrofit existing ones. • There is no need for a sludge treatment unit (consumable item or manual cleaning system). The diversion chamber acts as an automatic maintenance-free sludge treatment system, collecting particles backflushed from the full-flow chamber and clea

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Filter frame Upper half Lower half Filter element Filter screen Figure 1. Full-flow element. Diesel engine protection The fuel oil conditioning system includes filters to remove solid particles that may have entered the system after the separator, which is installed in the cleaning system. The filter therefore prevents any potentially dangerous particles from reaching the sensitive parts of the diesel engine fuel system. To guarantee 100% full-flow protection, the filter should be installed as close to the engine as possible. Distributor drive The distributor, which creates the backflushing...

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Circulation pump capacity Maximum capacity of the filter Fuel oil flow to the engine Flow of backflushed cleaned oil Filter inlet pressure Filter outlet pressure Backflushed oil outlet pressure Pressure in deaerator Engine pressure control valve Return from engine From diesel engine V21 Pressure regulating valve Circ. pump Recommended for certain engines Figure 4. Protective automatic fuel oil filter, shown on the hot side (circulation side) of the booster module. Operating principle The unfiltered oil is fed into the filter by means of the distributor, which is driven by an electric motor...

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2 bar above pressure (P3) 3-5 bar above pressure (P3) 30 bar 75 cSt 160°C 0.8 bar Nodular cast iron Stainless steel Steam/hot water/thermal oil 110/220 V, 50/60 Hz, single phase Guidelines to overall dimensions For flow rates up to 20 m3/h: Height x Length x Width (mm): 900 x 250 x 250 or with the built on bypass: 900 x 660 x 250 For flow rates from 20 to 40 m3/h: Height x Length x Width (mm): 1620 x 500 x 450 or with the built on bypass: 1620 x 1130 x 450 Other Alfa Laval filtration products Alfa Laval also manufactures filters for other engine room applications, such as automatic filters...

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