Filter maintenance is unnecessary engine downtime while you are at sea or relying on diesel generator power. The Separ Filter duplexes eliminate the need to service the filter immediately, before resuming operation. Duplex units contain two filters, using one at a time. When the primary filter is in need of maintenance, you can manually switchover to the backup filter for continued engine or generator operation. Then service the primary filter or schedule for a later time. Increase your reliability of uninterrupted power. Existing installations below also feature duplexes with vacuum gauges, which help to monitor the need tobackflush the filter or replace the element.