The production of compressed air always also generates condensate water. The amount of condensate depends of the size and the number of operating hours of the com- pressor and can be 10 or 10.000 mg oil per month. Such condensate water from oil-lubricated com- pressors may contain up to 2.000 mg oil per liter. Environmental protection legislation requires alredy, or shall soon require condensate water to be cleaned from oil before discharging it into the public sewage system. in countries with such legislation for Water Recources Conservation, the limit-value is set at 20 mg oil per liter of condensate water. If the condensate is not to be oil-free, it must be collected and discharged by an especially licensed company! The drukomat removes the oil form the condensate water quite reliable. It does so by way of flowing water is re- directed an calmed down, plus a series arrangement of coalescence- and activated carbon filters. The condensate water is now so clean, that it can be discharged into the public sewage system. The oil is beiing collected in an oil-Container and can be taken care separately.