A submersible pump is a pumping device designed to operate with its entire body submerged in the liquid being handled. Driven directly by a sealed electric motor, it rotates an impeller to lift liquid from a lower level to a higher level. It is an essential component in modern hydraulic and fluid-transfer systems.
Compared with traditional surface-mounted pumps or self-priming pumps, a submersible pump incorporates a fully sealed motor and pump section that operates entirely underwater. This eliminates the need for suction lift and prevents cavitation, offering significant advantages in efficiency, stability, and operational safety.
Submersible pumps are widely used in agricultural irrigation, urban drainage, industrial and mining dewatering, and domestic water-supply systems. Their strong adaptability, long service life, and high efficiency make them a core technology in global fluid-transfer applications.
A submersible pump uses a sealed electric motor to rotate the impeller. Centrifugal force pushes water outward from the impeller, creating pressure and lifting the liquid upward through the pump casing.
Motor: Fully sealed and waterproof to ensure safe operation underwater.
Impeller: Generates centrifugal force and provides the main pumping energy.
Mechanical Seal: Prevents water from entering the motor chamber, ensuring safety and longevity.
Pump Casing: Protects internal components and maintains pressure within the pump.
Because the pumped liquid naturally floods the pump inlet, there is no suction lift and thus no suction loss or cavitation, resulting in higher efficiency than conventional centrifugal pumps.
Enhanced reliability and protection against leakage or electrical faults
Stable long-duration underwater operation
Reduced maintenance frequency
Used for clean water transfer from wells, rivers, or storage tanks.
Features: High efficiency, large flow, low noise.
Designed for wastewater containing solids or debris.
Features: Large-channel impellers, solid-handling capability, anti-clogging and wear-resistant.
Used in mining, metallurgy, and sand-processing for high-concentration slurry.
Features: Heavy-duty design, wear-resistant materials, high torque.
Long, slender pumps designed for deep-well water extraction—typically tens to hundreds of meters deep.
Used for rapid dewatering in basements, construction sites, and emergency flood control.
Used to increase pressure in piping networks to maintain stable water supply and long-distance transport.
Irrigation: Suitable for sprinkler, drip, and channel irrigation.
Groundwater extraction: Borehole pumps ensure stable irrigation water supply.
Livestock water supply systems: Provides continuous, reliable water delivery.
Advantages in Agriculture:
Stable flow | Low maintenance | High energy efficiency
Urban flood control and drainage: For rainstorm emergency pumping, underground garages, and metro systems.
Sewage lift stations: Used in wastewater treatment plants for solids-laden wastewater.
Stormwater management: Drains accumulated water from stormwater networks.
Municipal water supply: Borehole pumps serve as key components of municipal water-source extraction.
Mining: Dewatering tunnels, shafts, and pits to ensure operational safety.
Oil & Gas: Handles complex fluids containing oil, sand, or suspended solids.
Construction sites: Dewatering foundations and excavations.
Manufacturing: Used for cooling water, circulation water, and sludge transfer.
Bilge pumping: Critical equipment for vessel safety.
Seawater circulation & cooling: Requires corrosion-resistant materials.
Marine-grade submersible pumps: Built with stainless steel or marine alloys, offering strong corrosion and salt-spray resistance.
High efficiency: No suction loss; superior energy performance.
Quiet operation: Liquid environment provides natural sound insulation.
Self-priming capability: No priming required; instant startup.
Cavitation-free: Fully submerged design eliminates cavitation risks.
Wide fluid compatibility: Suitable for clean water, sewage, sludge, and high-viscosity fluids.
Clean water → Clean water pump
Sewage or solids-laden fluid → Sewage pump
High-density slurry → Slurry pump
Deep wells → Borehole pump
Estimate daily flow demand and required lift according to the application.
Stainless steel: Corrosion resistance
Cast iron: Wear resistance and cost-effective
Corrosion-resistant alloys: For seawater and chemical media
Ensure compatibility with the power supply (single-phase or three-phase) to avoid motor failure.
Deep wells or mines require long-shaft or multi-stage designs
Seawater requires anti-corrosion materials
Construction sites require wear-resistant structures
Select a pump whose rated flow, head, and efficiency curve match the application to avoid overload or underload operation.