When your process demands consistent flow, high suction lift, and the ability to move viscous or abrasive fluids, the rotary piston pump delivers. Built for tough environments and engineered for accuracy, rotary piston pumps are widely used across oil & gas, chemical processing, paint, ink, and high-viscosity applications.

At MultiTorque, we provide Australian industries with robust rotary piston pumps designed for performance and built to last. Whether you need a stationary setup or a mobile pumping unit, our team has the gear and know-how to make it happen.

What Is a Rotary Piston Pump?

A rotary piston pump is a type of positive displacement pump that uses one or more pistons moving in a rotary motion to draw fluid into a chamber and then expel it through an outlet. Unlike reciprocating piston pumps, rotary piston pumps operate continuously, delivering a steady, low-pulsation flow.

They’re ideal for fluids that are too viscous or abrasive for centrifugal pumps, and they thrive in high-pressure or high-temperature environments where other pump types struggle.

How It Works

Rotary piston pumps use eccentrically mounted pistons or plungers within a cylindrical chamber. As the rotor turns, the piston slides in and out of the chamber, drawing in and expelling fluid with each rotation. Internal sealing vanes or timing gears ensure tight tolerances and high efficiency.

This design allows for:

• High suction capability

• Accurate flow control

• Low-shear handling

• Minimal pulsation compared to other positive displacement pumps

Key Benefits of Rotary Piston Pumps

• Handles Viscous Fluids: Ideal for molasses, grease, paints, inks, oils, and slurries.

• High Suction Lift: Can draw fluid from depths without priming.

• Precise Dosing: Consistent flow rates make it perfect for metering and batching.

• Durable Construction: Handles abrasives, corrosives, and high temperatures with ease.

• Low Pulsation: Smooth discharge makes it ideal for delicate processing.

• Self-Priming & Reversible: Flexible operation for tank loading, transfer, and draining.

Common Applications

Rotary piston pumps are used across industries that demand control and durability:

• Oil & Gas: Crude oil transfer, lube oil circulation, heavy fuel handling.

• Paint & Coatings: Transfers paints, varnishes, solvents, and adhesives.

• Food Processing: Molasses, syrups, honey, chocolate, and vegetable fats.

• Chemical Plants: Aggressive or high-viscosity chemicals, resins, and polymers.

• Pharmaceuticals: Gels, creams, and high-viscosity actives where clean handling is critical.

• Agriculture: Dosing of thick nutrient solutions and supplements.

Technical Specs & Configurations

• Flow Rates: From 5 L/min to 1,200+ L/min depending on size and rotor speed.

• Pressure Range: Typically up to 20 bar (290 psi).

• Viscosity Handling: From 10 cP up to 1,000,000+ cP with proper configuration.

• Material Options:

  • Pump body: Stainless steel, cast iron, or bronze.

  • Seals: Mechanical, lip, or packed—depending on chemical compatibility.

  • Pistons: Coated for wear resistance or designed for CIP (Clean-in-Place).

• Mounting Options: Skid-based, wall-mounted, or fully mobile trailer units.

Maintenance & Longevity

Rotary piston pumps are built to last—but ongoing inspection is key:

• Monitor piston seals and internal vanes for wear.

• Flush the system when switching between fluids.

• Lubricate according to spec to avoid seal damage or dry runs.

• Use OEM parts to preserve tolerances and certifications.

With the right care, these pumps can run for tens of thousands of hours with minimal servicing.

Why Choose MultiTorque?

MultiTorque is your go-to Australian supplier for industrial pumping solutions. We’ve been in the game for 15+ years and know exactly how to configure, install, and maintain rotary piston pumps for your operation—whether you’re transferring fuel oil, molasses, or epoxy resin.

We offer:

• Expert product selection

• On-site servicing

• Mobile pump trailers

• Fast access to spares and parts

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Need a rotary piston pump tailored to your process? Call MultiTorque today on 1300 726 525 or email sales@multitorque.com.

🔗 Visit us at: https://www.multitorque.com.au
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