... , ASME B16.34, API598Face to Face Std.: ASMEB16.10 (JISB2002),API 6D, DIN3202, ASME B16.25End Connection Std.: ASME B16.5 ... -JISB2214, DIN2543-2550,ASME B16.34Test Standard: ISO5208, API598 (JISB2003), API 6D, BS 6755Structure Type: One-piece, Two-piece, Three-Piece ... way: Manal penumatic electtric hydraulicDetials creates quality !!! Quality creates pecfect!!! API check valves