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Alfa Laval DuraCirc Aseptic Circumferential Piston Pump for Pharmaceutical Processing

The Alfa Laval DuraCirc Aseptic Pump is an advanced circumferential piston pump (CPP) designed for aseptic applications in the food, beverage, pharmaceutical and personal care industries.

Built for high volumetric efficiency, superior hygiene and robust performance, the DuraCirc pump balances durability, reliability and easy maintenance. With a unique design that minimizes product contamination risks, it is EHEDG & 3-A certified, making it an industry-leading solution for aseptic processing.

Pharmaceutical Processing Focus

The Alfa Laval DuraCirc Aseptic Pump is specifically engineered for pharmaceutical processing, including sterile transfer, aseptic circulation and CIP/SIP systems in regulated production environments. It is widely used in API manufacturing, vaccine production and sterile formulation processes where contamination control is critical.

Applications of the Alfa Laval DuraCirc Pump

The DuraCirc Aseptic Pump is ideal for industries requiring hygienic and high-pressure processing, including:

Primary Application – Pharmaceutical Processing

Sterile fluid transfer
Aseptic circulation loops
API production
Vaccine and injectable manufacturing

CIP and SIP systems in pharmaceutical plants

Secondary Applications

Food and beverage processing
Personal care and cosmetic production
Hygienic chemical processing

Key Benefits of the DuraCirc Pump

1. Supreme Performance & High Efficiency

Close pump head clearances maximize volumetric efficiency & process yield.
Supports medium to high discharge pressures, ensuring stable operation in demanding applications.
Advanced port and pump-head geometry significantly reduce cavitation risks, enhancing product integrity.

2. Superior Hygienic Design

Certified for EHEDG, 3-A and FDA-compliant applications.
Profiled, FDA-compliant elastomers eliminate crevices and dead zones, preventing contamination.
All stainless-steel exterior for enhanced corrosion resistance & washdown protection.

3. Robust & Reliable Construction

Heavy-duty bearings reduce shaft movement, ensuring long-lasting durability.
Stainless steel gear case & duplex shafts provide rigid, vibration-free performance.
Optimized shaft seal location ensures extended service life.

4. Simplified Service & Maintenance

Front-loading mechanical seals allow quick, in-situ replacement without disassembling the pump.
Modular seal design enables easy conversion without re-machining or additional flush housings.
Uni-Fit Retrofit Port allows easy replacement of existing piston pumps from other brands.

Designed as an aseptic circumferential piston pump for pharmaceutical processing, the DuraCirc ensures contamination-free operation in high-purity and sterile environments.

Technical Specifications

Pump Type: Circumferential Piston Pump (CPP)
Flow Rate: Up to 103 m³/h (453 gpm)
Operating Pressure: Up to 25 bar (363 psi)
Materials: Stainless Steel AISI 316L, FDA-compliant elastomers
Seal Type: Double mechanical seal, prepared for sterile flushing
Certifications: EHEDG, 3-A, FDA, USP Class VI

The DuraCirc Pump construction features two rotors, housed within a pumping chamber, known as a rotorcase, with each rotor located on a shaft held rigidly within a gearcase. The two rotors are timed via timing gears in the gearcase, which along with shimming, ensures no rotor or rotor case contact. Rotor/shaft drive is typically provided via geared electric motor.

Due to the close internal running clearance within the pumping chamber, the rotation of the rotors continuously generates a partial vacuum in the suction port of the pump as the rotors unmesh. This results in a localized pressure drop, which allows fluid to enter the pump. The fluid is then transported around the channel by the rotor wings and the pressure generated as the rotor wings re-mash forces the fluid out of the discharge port of the pump.

Duracirc Pump Working principle

The rotor pistons rotate around the circumference of the channel in the Duracirc Pump casing. This continuously generates a partial vacuum at the suction port as the rotors unmesh, causing fluid to enter the pump. The fluid is transported around the channel by the rotor pistons and is displaced as the rotor pistons re-mesh, generating pressure at the discharge port. The direction of the flow is reversible.

Comparison: DuraCirc vs. Traditional Circumferential Piston Pumps

Feature	Alfa Laval DuraCirc	Traditional CPP
Efficiency	Higher volumetric efficiency	Moderate efficiency
Hygienic Certification	EHEDG, 3-A, FDA compliant	Some may lack full certification
Maintenance	Quick, front-loading seal replacement	Requires disassembly for seal changes
Flexibility	Uni-Fit Retrofit Port for easy upgrades	Limited adaptability