Our seals have a large inside diameter with a lot of space between the seal and the shaft preventing seal damage from shock. When a hard piece of debris (rock, wood, etc) hits the pump impeller, it deflects the shaft momentarily and fractures the seal. Small diameter seals fit snug on the drive shaft. We also make the seal much larger in diameter than those found in most “trash pumps”. Silicon carbide is a premium seal material that is utilized in most industrial grade pumps. The Mini dredge pump is equipped with an oversized silicon carbide shaft seal. A leaky shaft seal will disable your pump completely, by allowing air to enter the pump case instead of water being drawn up the suction hose. The shaft seal is the component that seals the engine shaft as it enters the pump case. Carbon/ceramic is the cheapest seal material there is and is a strong indication that your pump is designed to pump water only. Cheap trash pumps usually utilize small diameter carbon/ ceramic shaft seals. The agitator water jet system is necessary to deliver kinetic energy (energy of motion) to the sediment to take it from a solid state rendering it a fluid slurry.Ĭheap trash pumps are not designed to withstand abrasion or shock. First of all, a self priming pump alone is not very effective in removing sediment.
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