Deep well water intake usually features mixed sediment, complex water quality and high downhole pressure, which easily cause sealing wear, water leakage and internal core damage to traditional deep well pumps. Targeting this industry technical bottleneck, Jinyu Pump has carried out special upgrades on the mechanical sealing system and independently developed a multi-layer composite sealing structure technology. The new pumps adopt silicon carbide ceramic wear-resistant sealing components, paired with double-layer axial sealing and sand-proof water retaining structures, which can effectively block sediment and impurities from entering the pump core and prevent high-pressure leakage in deep well high-pressure water environments. After tens of thousands of hours of continuous working condition tests, the wear resistance, water tightness and compression resistance of Jinyu Pump’s upgraded sealing system have been greatly improved. It thoroughly solves the technical problems of water leakage, burnout and short service life of pumps in complex deep well water quality, increasing the continuous trouble-free operation time of equipment by more than 40%, and providing core technical support for long-term stable operation of deep well water intake equipment.