SN Series Three Screw Pump

SN Series Three Screw Pump

The SN Series Three Screw Pump is a highly efficient positive displacement pump designed for the continuous and stable transportation of lubricating and non-corrosive liquids. With advanced three-screw transmission technology, the pump provides smooth flow, low pulsation, low noise, and reliable performance, making it widely used in petroleum, marine, power generation, metallurgy, hydraulic systems, and industrial lubrication applications.

The pump consists of one driving screw and two driven screws precisely meshing inside the pump casing. During operation, the rotating screws form sealed chambers that continuously move liquid from the suction side to the discharge side, ensuring stable pressure output and gentle fluid handling. The SN Series Three Screw Pump is especially suitable for transporting lubricating oils, fuel oils, hydraulic oils, heavy oils, and similar media with lubricating properties.

Product Features

Stable and Pulse-Free Flow
The three-screw structure ensures continuous, smooth, and low-pulsation liquid delivery, effectively reducing vibration and protecting connected systems.

High Efficiency and Energy Saving
Precision screw machining and optimized hydraulic design improve volumetric efficiency while reducing energy consumption during operation.

Low Noise and Low Vibration
The balanced screw rotation and compact internal structure allow quiet and stable operation, making the pump suitable for industrial environments requiring low noise levels.

Excellent Self-Priming Capability
The pump has strong suction performance and can quickly achieve self-priming without additional auxiliary devices.

Long Service Life
Manufactured with high-quality materials and advanced processing technology, the pump offers excellent wear resistance, operational stability, and long-term durability.

Compact Structure and Easy Maintenance
The compact design allows convenient installation and simplified maintenance, reducing downtime and operating costs.

Wide Operating Range
Suitable for different viscosities, pressures, and temperatures, meeting various industrial fluid transfer requirements.

Working Principle

The SN Series Three Screw Pump operates through one actively driven central screw and two driven screws rotating in synchronized motion within the pump housing. As the screws rotate, sealed cavities are created and move continuously along the screw axis, transporting the liquid smoothly from the inlet to the outlet. The fluid flows axially without turbulence, ensuring stable pressure and low shear force.

Main Applications

The SN Series Three Screw Pump is widely applied in:

• Lubricating oil circulation systems

• Fuel oil transfer systems

• Hydraulic transmission systems

• Marine engineering and shipbuilding industries

• Power plant fuel supply systems

• Metallurgical and heavy industrial equipment

• Petrochemical processing systems

• Industrial boiler fuel transportation

• Mechanical lubrication systems

Suitable Media

The pump is suitable for transporting:

• Lubricating oil

• Hydraulic oil

• Fuel oil

• Diesel oil

• Heavy oil

• Crude oil with lubricating properties

• Industrial oil mixtures

• Non-corrosive viscous liquids

Product Advantages

Compared with gear pumps and centrifugal pumps, the SN Series Three Screw Pump offers smoother flow, lower noise, higher pressure stability, and stronger adaptability to medium viscosity changes. Its reliable operation and efficient performance make it an ideal solution for industrial lubrication and oil transfer systems.

Customization Service

Customized pump solutions are available according to customer requirements, including:

• Different flow rates and pressure specifications

• Cast iron, stainless steel, and alloy steel materials

• Explosion-proof motor configurations

• High-temperature resistant designs

• Various sealing methods

• Horizontal or vertical installation structures

The SN Series Three Screw Pump combines durability, operational efficiency, and reliable fluid handling performance, providing dependable solutions for modern industrial fluid transportation systems.