... -DN200 3,Materials:ceramic 4,Certificates:ISO9001 Ceramic water level control valve Standards: 1,Material: lining ceramic/ body carbon steel + stainless steel2 ... ,Test Standard: ISO5208, API598 (JISB2003), API 6D, BS 67557,Structure Type: Short Pattern,Regular Pattern,Venturi Pattern,Full Bore Pattern8,Operated ...