The flange filter series contains the same type of strong, efficient filter element as the threaded series. The filter element is contained in a welded steel housing and provides flange connections at the compressed air inlet and outlet. The filter housing has been completely cleaned: zinc phosphate and KTL coating both inside and outside, then spray painted outside. This guarantees a housing life of at least 20 years. All flanged filters are standard with a zero loss electronic drainer and differential pressure gauge with no voltage contact connection. The special rotating system of the bottom cover makes the replacement of the filter element very simple.