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MANN+HUMMEL
Next generation of oil centrifuges
Extended service life for engine oil and oil filters with MANN+HUMMEL centrifuges
At the BAUMA trade fair, MANN+HUMMEL will present two new oil centrifuges for oil filtration in the bypass. This enables solutions for small engines where installation of the centrifuge can only be made away from the engine and also for engines with a low oil pressure. Both centrifuges improve the oil filtration in the bypass and enable longer oil change intervals and an extended oil filter service life.
Ludwigsburg, 19th April, 2010 – in Munich, MANN+HUMMEL will present two new oil centrifuges for bypass oil filtration. The specific design of both centrifuges enables new applications. One centrifuge is for low pressure oil circuits and the other is for industrial machines not equipped with a compressed air supply. As a result, these applications will be able to benefit from the special advantages of bypass oil filtration. The most important advantages are a longer oil filter service life and longer filter change intervals with the same low level of engine wear.
Oil centrifuges for the low pressure range
In the development of modern engines there is a trend towards low pressure oil circuits. The new centrifuge from MANN+HUMMEL takes this into account. The centrifuge achieves its high filtration efficiency already at pressures below 4 bar – also with the smallest of particles. The oil centrifuge is equipped with a special, patented combination of a bearing with a plastic rotor which reduces the existing frictional and flow losses to a minimum. This enables a high rotation speed, also at low pressure conditions in the oil circuit.
In comparison, conventional centrifuges are driven by engine oil pressure. They achieve their highest filtration efficiency when the centrifuges are driven with hot oil and high pressure of 4 to 8 bar. This is the only way to achieve the maximum rotation speed and the resulting high centrifugal force necessary to separate fine particles such as soot particles in the submicron range from the oil. If these conventional centrifuges are fitted to a diesel engine with a low oil pressure of approx. 2 to 4 bar, they can only realise a reduced separation efficiency.
Ventrifuge – centrifuges for mobile industrial machines
In the ideal case centrifuges for bypass filtration are fitted directly to the engine to facilitate the return oil flow. However, limited installation space may require installation of the centrifuge away from the engine. In such cases it is necessary to support the return oil flow with compressed air. But small industrial machines are frequently not equipped with the means of compressed air. Therefore installation away from the engine is more difficult and this has so far excluded many application areas, e.g. small mobile industrial machines.
The new oil centrifuge "FM025 Venturi" has now overcome these disadvantages. Its compact design and function enables use also with such applications. The Venturi technology allows the cleaned oil to also pass through smaller outlet pipes back to the oil sump without the support of compressed air. In contrast to conventional centrifuges, the efficient and economic function of this centrifuge does not require large connection pipes or the availability of compressed air.
In addition, the new design allows high rotation speeds up to 9000 rpm at an oil pressure of 2 to 7 bar. The high centrifugal force generated in this way enables efficient separation of also the finest particles and therefore extended service intervals and low engine wear. The current version is equipped with a metal rotor suitable for cleaning and there are plans for a version with a recyclable, disposable plastic rotor.
Centrifuges offer a quick return on your investment:
Improved oil purity leads to longer oil change intervals and therefore lower disposal costs. And the service life of the oil filter is extended. Lower engine wear results in less engine downtime and the maximum period of use for vehicles, engines and machines. MANN+HUMMEL has more than 30 years experience in the field of bypass filtration with centrifuges. Today, the company is one of the leading suppliers worldwide. The use of oil centrifuges efficiently separates contaminants such as soot and metal abrasion particles from the lubricating oil of diesel engines. This technology can also be effectively applied to gearboxes, hydraulics systems and other industrial applications. MANN+HUMMEL centrifuges use centrifugal force to clean the oil which is 2000 times greater than that of gravity. In this way solid particles are separated from the oil – a process which has been verified to enable the separation of dirt particles finer than 1 micron.
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Arthur, Due to the 300Tdi not having much of a sooting problem, (and I stress this mostly applies to non tweaked examples), I wouldn't think it entirely necessary. The modern diesel oils are excellent, if you are changing at less than 10K and not driving it like you stole it or conversely not idling it around town all day, I would leave it as is.
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