D122S44 Stuffing Box Seal for 4/3 Slurry Pump. And the sealing ring can also be called a leakage reducing ring. When the gap between the impeller inlet and the pump casing is too large or too small, it will affect the normal operation of TOBEE's slurry pump. When it is too large, the water output of the pump is abnormal and the delivery efficiency is low! If the time is too small, the impeller and pump casing will be damaged due to friction. If the sealing ring is installed at the connection between the inner edge of the pump casing and the external aid of the impeller, the return resistance will increase, and the internal leakage will be reduced, which greatly prolongs the use time of the impeller and the pump casing.