MANN Engine Oil Separator

MANN Engine Oil Separators: ProVent Technology for Crankcase Protection

When blowby gases escape past piston rings and valve shafts during normal engine operation, they carry with them a mist of fine oil droplets that can foul intake components, coat intercoolers, and degrade turbocharger performance over time. MANN — the filtration brand of MANN+HUMMEL — has spent decades engineering solutions to this exact problem, and their ProVent line of engine oil separators stands as one of the most respected answers in the industry.

The ProVent Family: Purpose-Built Oil Separation

The ProVent series was originally developed to address blowby gas challenges in large diesel industrial engines, and its engineering pedigree shows. The ProVent® 200, for example, is a crankcase ventilation system with integrated oil separation and pressure control that reduces vehicle emissions and minimizes deposits in the intake tract. The range spans multiple models to cover a wide variety of engine sizes and applications.

The ProVent² generation from MANN+HUMMEL offers smart solutions for blowby gas oil separation for all diesel engines with an engine capacity between 2.9 and 80 liters. Each unit in the lineup is built around a core insight: conventional inertial separators struggle with the smallest oil droplets that modern high-performance engines produce. So-called fiber separators are recommended here, which exploit the principle of coalescence. All the filter elements of the ProVent² range are fitted with a highly-efficient separation media which has a specially designed fiber structure.

What Sets MANN Oil Separators Apart

MANN's engineering advantage in this category comes from both the quality of the separation media and the thoughtfulness of the system design. The result is a coiled filter element with high-efficient media made from glass fiber and a non-woven fabric. After several thousand operating hours, field trials and engine tests indicate an insignificant increase in pressure — the ProVent² range therefore impresses with a service life which is up to eight times longer than comparable solutions.

MANN utilizes technology from their compressed air industry knowledge and adapts it to the filter element — separating around 98% of contaminants. The ProVent 200 is also fitted with an integrated safety valve to guard against irregular crankcase pressure. The system can also function in both open and closed crankcase ventilation configurations. The ProVent² 200 can be used as an open system (oil separation only) or a closed system, with recirculation of the separated oil and the residual gas, as well as control of the crankcase pressure.

Servicing is equally well-considered. The ProVent 200 features tool-free element replacement with a turn-lock mechanism and an integrated element handle, plus protection against incorrect insertion — meaning maintenance can be performed quickly and confidently, even in tight engine bays.

Why Engine Oil Separation Matters

In modern engines, the trend is towards closed crankcase ventilation where the blowby gas is returned to the intake channel of the engine. Using a separator integrated in the crankcase ventilation, the oil droplets are separated from the blowby gas and the oil is returned to the oil sump. In the closed crankcase ventilation process, the efficiency of the separation is particularly significant because the components in the intake channel — such as the turbocharger, intercooler, and inlet valves — have to be protected against contaminants contained in the oil from the blowby gas.

MANN-FILTER is a technology leader in air oil separation and development partner for the leading market manufacturers of vacuum pumps and compressors globally. That same cross-industry expertise feeds directly into the engine oil separator products available here. Whether you are maintaining a diesel work truck, an agricultural machine, or a performance application, MANN's filtration engineering delivers dependable, OE-quality results.

Explore the full range of engine oil separators or browse all MANN filtration products to find the right solution for your application.