Apollo Valve 125YF Series Cast Iron Y-Strainer, 2-1/2" Flange, 0.045" Perforated Screen Iron strainers are complete with flat face flanges in accordance with ASME B16.1 Strainers equipped with bolted cover flange utilizing a flat gasket seal Low pressure drop Upper and lower machined seats 304 Stainless steel perforated screens are standard