The Wärtsilä lube oil bypass filter unit is an OEM-validated filtration solution specifically designed and field-tested for the Wärtsilä 31 marine engine. Drawing oil from the engine-driven main lubrication oil pump, it delivers high-efficiency particle removal to extend engine life and reduce maintenance costs.
The bypass filtration system draws oil from the engine-driven main lubrication oil pump and returns it to the engine oil sump via a separator connection. The filtration rate is 9 µm (β9=75 standard), and the filter element lifetime is up to 1500 hours.
The Wärtsilä Lube Oil Bypass Filter Unit is an OEM-validated filtration solution specifically designed and field-tested for the Wärtsilä 31 marine engine. It provides continuous bypass filtration of lubricating oil to maintain oil cleanliness and remove fine particulate contamination.
The bypass filter unit draws oil at a flow rate of 1.0–6 m³/h from the engine-driven main lubrication oil pump. The oil is taken from the pump outlet and returned to the engine oil sump via a separator connection, creating a continuous cleaning loop rather than filtering the complete lubricating oil flow.
Wärtsilä specifies a filtration rate of 9 µm (β9=75 standard) and a separation efficiency of 99.5% for particles ≥10 µm. The filter element has a lifetime of up to 1,500 hours. This filtration approach helps maintain lubricating oil cleanliness, extend engine life and reduce maintenance and operational costs compared with traditional separator-based solutions.
The filter unit is available in different sizes according to engine capacity and lubricating oil volume requirements. Exact filter unit size, OEM part numbers and installation-specific configuration should be confirmed against the applicable Wärtsilä documentation or spare parts catalogue before ordering.