Twin screw pump

1. Product Overview

Twin-screw pumps are positive displacement pumps that use two intermeshing screws rotating in opposite directions to move fluid along the pump axis. A key feature is that the screws do not directly contact each other; instead, they are synchronized by external timing gears, which ensures long service life and continuous operation capability.

2. Characteristic Technical Specifications

3. Key Advantages in the Petroleum Industry

Customers often choose twin-screw pumps over gear or centrifugal pumps because:

• Non-pulsating flow: Provides smooth, steady fuel delivery without pipeline vibration.
• Excellent self-priming ability: Strong vacuum suction allows fuel to be drawn from underground tanks without priming.
• Handles diverse fluids: Capable of pumping gasoline, diesel, heavy fuel oil (FO), and even mixtures of oil, gas, and water without air lock or damage.
• Exceptional mechanical durability: Since the screws do not touch, wear is minimal, reducing maintenance costs.
• Quiet operation: Much lower noise compared to other industrial pumps.

4. Specialized Construction

• Timing gears: Located outside the pump chamber, maintaining precise clearance between screws and preventing friction.
• Integrated safety valve: Protects pump and pipeline from overpressure at discharge.
• Heating jacket (optional): Allows circulation of steam or hot water to liquefy heavy oils (such as Mazut/FO) before pumping.

5. Practical Applications

• Fuel terminals: Transfer of petroleum products between ships and storage tanks.
• Refineries: Transporting petroleum products between processing units.
• Boiler feed systems: Supplying heavy fuel oil to large burners.
• Asphalt production: Pumping molten bitumen at high temperatures.