... bottom entry mixers, cartridge mechanical seal, cartridge sea 285, 286, 288 series mechanical seal for bottom entry mixers (cartridge mechanical seal ... ,L0 ) is adjusted according to length of shaft end. Type 288 has the whole short shaft structure, working pressure is 1 ... .0 MPa , cavity temperature ≤ 80, Velocity≤3m/s. 285, 286, 288 series mechanical seal for bottom entry mixers