Reducing emissions from internal combustion engines has been a major environmental concern. Up to now, most of the focus has been on exhaust gases. However, crankcase gas has now come into focus as an area where further emission reductions can, and should, be made. Application PureVent is a compact centrifugal oil mist separator that, when connected to medium-speed diesel engines, removes 98–99.9% of oil from crankcase gases. Recovered oil can then be re-circulated to the oil sump and used again for engine lubrication. Two installation options are available: • Open design for diesel engines releasing oil-free crankcase gas directly into the atmosphere. • Closed design for gas engines re-circulating clean gas to the turbocharger, thereby reducing the atmospheric emissions further and eliminating turbocharger fouling. Benefits • High separation efficiency. Provides 98–99.9% separation efficiency at 40–150 m3/h. • Stable pressure conditions. No pressure drops or clogging associated with filter cleaning solutions. The continuous outflow at constant flow stabilizes pressure in the crankcase. • Recovered oil can be re-circulated to oil sump. • No hazardous waste. Elimination of oily filter disposal costs. • Long maintenance intervals. Two-year service intervals eliminate the frequent maintenance requirements associated with filter replacement. PureVent Centrifugal oil mist separator for cleaning crankcase gas The PureVent centrifugal oil mist separator removes 98–99.9% of oil from crankcase gases.

Operating principle The PureVent centrifugal separator consists of a disc stack made of composite lightweight polymer material, which is enclosed in an aluminium housing. Connected to this is an electric motor that drives the disc stack. A frequency converter unit controls the separator motor. Uncleaned crankcase gas enters through the inlet at the bottom of the unit and passes into the rotating disc stack. The oil mist is separated in the disc stack; the oil drops are collected on the separator housing inner wall and drained at the oil outlet. For gas engines, the cleaned air can be re-circulated...

Operations • Maintenance intervals – Major Service every 16000 hours or five years, whichever comes first. • System manual includes detailed information in electronic format or paper copy: – Operating instructions – Alarms and fault finding – Service and spare parts Technical data Performance Capacity Max. 800 m3/h Inlet gas temperature Max. 80°C Nominal flow 150 m3/h Cleaning efficiency at nominal flow 98% Sound level 78 dB (A) Dimensions and weights Size (height x length x width) 698 x 342 x 401 mm Weight 39 kg Ambient conditions (operation) Surrounding temperature +5 to +50°C Electric cabinet...