... and hardness 3. high wear resistance Silicon Carbide Ceramic Sleeve for Pumps, sic pump sleeve, ceramic sleeve 1. why ceramics? ... vacuum pump, fixed anode X-ray tube shaft; bushing bearings for strong acid, strong alkali, salt, measure pumps, flowmeter and ... deep well pump; bushing bearings for nonmagnetic, electric insulation. 3.2 Characteristic: resistant to strong ...