Description:- 1. Materials: Cast iron, Ductile Iron, SS304, SS316, CF8, CF8M, Carbon steel (WCB, WCC, WC6, LCB, LF2, WC9) 2. Class: 150 to 2500. 3. Nominal Pressure: PN10 to PN450. 4. Size: ½” to 40” https://www.uaevalves.com/product-category/conventional-safety-valve/