The offered Duplex Filter is made available by us for use in the various commercial and industrial applications. The offered filter is very safe to use. The offered filter is used for separating solids and/or aerosols (liquid content) from gases using a patented double block and bleed main transfer valve. This is intended for applications using high pressures and/or dangerous gas compositions, to ensure maximum operator safety. The offered filter elements are designed for applications where the processes of treatment and purification must operate in continuous mode and without interruption. The offered Duplex Filters are used for water treatment, diesel, oil and petroleum products.