SM Series Three Screw Pump

SM Series Three Screw Pump

The SM Series Three Screw Pump is a high-performance positive displacement pump specially designed for the efficient transportation of lubricating liquids and viscous media. Featuring advanced three-screw rotor technology, the pump delivers stable flow, low pulsation, high pressure capability, and quiet operation, making it widely used in petroleum, marine engineering, power plants, metallurgy, chemical industries, hydraulic systems, and industrial lubrication applications.

The pump adopts one driving screw and two driven screws arranged in precise synchronization inside the pump housing. During operation, sealed cavities are continuously formed along the screw axis, enabling smooth and uninterrupted liquid transfer from the suction port to the discharge port. This design ensures stable pressure output, low vibration, and excellent operational reliability.

Product Features

Smooth and Continuous Liquid Delivery
The three-screw structure provides stable, pulse-free fluid transportation, reducing pipeline vibration and improving overall system stability.

High Pressure and High Efficiency
The optimized screw profile and precision manufacturing process allow the pump to maintain high efficiency and stable performance under high-pressure working conditions.

Low Noise and Low Vibration
The balanced rotating structure significantly reduces operational noise and vibration, creating a quieter and safer working environment.

Excellent Self-Priming Ability
The pump offers strong suction capability and can achieve rapid self-priming without additional auxiliary systems.

Strong Wear Resistance and Long Service Life
Manufactured from high-quality materials with advanced heat treatment and machining technology, the pump provides excellent durability and long-term operational stability.

Compact Structure and Convenient Maintenance
The compact integrated design simplifies installation and maintenance, helping reduce maintenance costs and downtime.

Wide Viscosity Adaptability
Suitable for transporting low-viscosity to high-viscosity lubricating liquids under different temperature conditions.

Working Principle

The SM Series Three Screw Pump operates through a central driving screw that rotates two driven screws inside a precision-machined pump casing. As the screws rotate, enclosed chambers are formed and move axially from the suction side to the discharge side. The liquid is transported continuously and smoothly with minimal turbulence and shear, ensuring stable pressure and efficient fluid transfer.

Main Applications

The SM Series Three Screw Pump is widely used in:

• Lubricating oil supply systems

• Hydraulic transmission systems

• Fuel oil conveying systems

• Marine fuel and lubrication systems

• Power plant oil transportation

• Metallurgical equipment lubrication

• Petrochemical processing systems

• Industrial machinery lubrication circulation

• Heavy oil and diesel transfer systems

Suitable Media

The pump is suitable for transporting:

• Lubricating oil

• Hydraulic oil

• Fuel oil

• Diesel oil

• Heavy oil

• Gear oil

• Industrial lubricants

• Non-corrosive viscous liquids with lubricating properties

Product Advantages

Compared with conventional gear pumps and centrifugal pumps, the SM Series Three Screw Pump provides superior flow stability, lower noise, stronger pressure adaptability, and better efficiency when handling viscous lubricating media. Its reliable operation and long service life make it an ideal choice for industrial fluid transportation systems.

Customization Options

Customized solutions are available according to different industrial requirements, including:

• Various flow capacities and pressure ratings

• Stainless steel, cast iron, and alloy steel materials

• Explosion-proof motor configurations

• High-temperature resistant structures

• Different sealing systems

• Horizontal and vertical installation types

The SM Series Three Screw Pump combines advanced engineering, durable construction, and reliable fluid handling performance, providing efficient and dependable solutions for modern industrial lubrication and oil transfer applications.