Type: Swing Check Valve. Materials: Cast Iron, Ductile Iron, Aluminum Bronze, Stainless Steel, and Carbon Steel. Size: 2-40 Inch (DN25-DN1000). Working Pressure: PN10, PN16, 125LB. Applicable Temperature: from -40 to +230 degree Celsius. Face to Face: DIN 3202-K3, GB 12221-16. Flange drilling according to ANSI 125/150, DIN 2501, AS2129 Table E, JIS 10K.