Check Valve Size: NPS 2" - 40" Pressure: Class 150 ?1500 Material:WCB, LCB, CF8, CF8M, CF3, CF3M, WC6, WC9, C5, and C12 Design & Manufacture Std.:API 6D, API 594, and ASME B16.34 Face to Face Std.: API 594, and API 6D End Connection Std.: ASME B16.5, and ASME B 16.47 Test Standard: ISO5208, and API 6D