Stainless Steel Screw Submersible Pump

The stainless steel screw submersible pump is a high-efficiency conveying device that uses a screw (screw rotor) as the core conveying element and integrates the motor and pump body into a sealed unit for operation submerged in liquid. Unlike traditional centrifugal submersible pumps, it relies on the rotation of the screw within the pump chamber to form continuous sealed cavities, achieving smooth axial transport of the medium. It is particularly suitable for high-head, low-flow applications and situations requiring high water flow stability.

Working Principle

The stainless steel screw submersible pump utilizes a positive displacement conveying principle:

Starting Phase
After the submersible motor is energized, it drives the screw rotor to rotate, and the pump body operates completely submerged in the liquid.

Conveying Process
Multiple continuous sealed cavities are formed between the screw and the stator. As the screw rotates, these sealed cavities move axially upwards, smoothly pushing the liquid to the outlet.

Continuous Water Discharge
The entire conveying process is free from significant pulsation, with stable flow and uniform pressure, making it particularly suitable for long-distance or high-head conveying.

Core Structural Components

Stainless Steel Pump Body
The pump casing and main flow-through components are usually made of 304 or 316 stainless steel, possessing excellent corrosion resistance and mechanical strength.

Screw Rotor and Stator
The screw is mostly made of high-strength stainless steel, and the stator lining is made of wear-resistant rubber or engineering elastic material, ensuring sealing and service life.

Submersible Motor
The motor and pump body are integrated, with good insulation performance and heat dissipation capabilities, suitable for long-term underwater operation.

Sealing and Bearing System
A multi-stage mechanical seal structure is adopted to prevent liquid from entering the motor cavity, ensuring safe and reliable operation.

Main Features and Advantages

High Head, Stable Water Discharge
The positive displacement conveying method ensures that the flow rate does not change significantly with the head, making it particularly suitable for deep well water lifting.

Strong Corrosion Resistance and Rust Prevention
The all-stainless steel flow-through structure is suitable for weak acid, weak alkali, and applications requiring high water quality.

Low Noise, Low Vibration
The helical conveying process is smooth, without violent hydraulic impact, resulting in quiet operation.

High Efficiency, Low Energy Consumption
Under low-flow, high-head conditions, it has a greater energy efficiency advantage than traditional multi-stage centrifugal pumps. Typical Application Areas

Deep well water extraction and supply systems

Rural and urban domestic water supply

Garden irrigation and sprinkler systems

Seawater aquaculture and transportation of mildly corrosive media

Water supply for industrial equipment

Selection and Usage Recommendations

Suitable for clean water or media with low sand content; not recommended for transporting large amounts of sediment or solid impurities.

Select the appropriate model based on well depth, required head, and flow rate.

During prolonged operation, ensure adequate motor cooling and avoid dry running.

For corrosive media, it is recommended to use 316 stainless steel material.