The Blackmer® S Series Triple Screw Pumps are a type of positive displacement rotary pump designed specifically for handling clean, lubricating fluids without solid components. These pumps consist of a male drive spindle, two female secondary spindles, and a casing that houses the three screws. The rotating screws and the casing form a sealed chamber that moves fluid in a continuous axial direction from the suction side to the discharge side. The smooth and constant flow is ensured by the rotation of the male drive screw.

These pumps are well-suited for various industries, including chemical process, general industrial, energy, transportation, and commercial marine markets. They are known for their reliability, low noise levels, ease of maintenance, self-priming capabilities, and eco-friendly operation. Additionally, they can handle differential pressures up to 100 bar (1,450 psi), with flow rates ranging from 2 to 2,600 L/min (0.5 to 685 gpm). The S Series pumps can also work at temperatures up to 150°C (302°F) and viscosities between 3 and 5,000 mm²/s (cSt).

S Series 3N Triple Screw Pumps:

These pumps are designed for low-pressure balanced self-priming applications and are primarily used for lubricating oils, hydraulic oils, fuel oils, and low-viscosity diesel oils. Key features include:

• Low pressure fluctuation and stable flow
• Strong self-priming capability with reverse rotation
• Low noise and vibration
• Compact design for easy installation and maintenance

S Series 3M Triple Screw Pumps:

The 3M series is designed for medium- and high-pressure applications. Like the 3N series, they are low-pressure balanced and self-priming, suitable for a variety of fluids, including fuels, hydraulic oils, and lubricating oils. Their key features include:

• Low pressure fluctuation and stable flow
• High efficiency, strong self-priming, and reverse rotation capability
• Low noise and vibration
• Compact design for easy installation and maintenance

S Series 3PF Triple Screw Pumps:

The 3PF series pumps are also low-pressure balanced self-priming and are used for medium- and high-pressure applications. These pumps are typically used in fuel systems, industrial lubricating oil systems, fuel furnace systems, and hydraulic transmission systems. Features include:

• Low pressure fluctuation and stable flow
• Strong self-priming capability and reverse rotation
• Low noise and vibration
• Compact construction for ease of installation and maintenance

These pumps excel in a wide variety of fluid handling tasks, providing an efficient and reliable solution for demanding applications.