... ,Materials:ceramic 4,Certificates:ISO9001 Ceramic water level control valve Standards: 1,Material: lining ceramic/ body carbon steel ... Rockwell hardness HRC90) are second after diamond.2, This valve has excellent wear resistance, corrosive resistance, ablative resistance, ... to four times longer than that of Titanium alloy valve and Monel valve. Applicable Areas:power plant desulfurization, deslagging, ...