... 13"control valve 2,DN: DN15-DN200 3,Materials:ceramic 4,Certificates:ISO9001 Ceramic water level control valve Standards: 1,Material: lining ... ceramic/ body carbon steel + stainless steel2,DN: DN15-DN2003,PN: ... .Advantages:1, The parts contacting with the media are made of ceramic material, whose chemical stability and hardness (Rockwell hardness HRC90) ...