The Strainer PN 25, which is manufactured by Ludemann, is a y-type strainer that utilizes a flange for connecting, and is integrated with a 1/2 inch drain-plug in cover. The body of the unit is made of JS 1030-grade nodular cast iron, and is integrated with a screen made of 1.4301-grade stainless steel, including a graphite reinforced gasket. The unit has a maximum test pressure of up to 37.5 bar.