... , cartridge sea 285, 286, 288 series mechanical seal for bottom entry mixers (cartridge mechanical seal, cartridge seal)These seals ... are special mechanical seal for bottom-entering tank. Type 285, 286 seals include shaft ... and double mechanical seal. Type 285 is used for 1.33×10-50.6MPa and type 286, ... ≤3m/s. 285, 286, 288 series mechanical seal for bottom entry mixers