Mechanical Seals, Pump Seals, Sic Ring manufacturer / supplier in China, offering 22mm CDLC-22(4R) Cartridge Mechanical Seals for CNP CDL/CDLF Pumps OD=77mm HQQV/HQQE, GLF-16-4R 4R GLFT-16 Cartridge Mechanical Seal HQQV/HQQE for Jockey Pump, GLFT CR-4R GL CDLC 12 16 22 mm Mechanical Seal Cartridge Seal and so on.