Why choose a circumferential piston pump for hygienic processes

The Alfa Laval DuraCirc is a circumferential piston pump purpose-built for CIP applications across the dairy, food, beverage, and home and personal care industries. Unlike conventional rotary lobe pumps, its twin-wing piston rotor design delivers high volumetric efficiency, enabling optimised pump selection that lowers capital costs while improving process yield. The result is a pump that handles low-viscosity fluids at medium to high discharge pressures with exceptional energy efficiency and consistent output.

Durable construction with 316L stainless steel

Every product-wetted steel component — including the rotor case, front cover, and rotor nuts — is manufactured from W. 1.4404 (316L) stainless steel. The rotors themselves are made from a special non-galling alloy that resists wear and seizure, even under demanding operating conditions. Shafts are duplex 1.4460 (329) stainless steel, providing superior strength and corrosion resistance. The gearbox, base plate, and coupling guard are also stainless steel, giving the DuraCirc an all-stainless exterior that stands up to washdown environments and aggressive cleaning chemicals.

EHEDG and 3-A certified hygienic design

The DuraCirc carries both EHEDG and 3-A certifications, confirming verified CIP cleanability and compliance with the most demanding hygienic design standards. Profiled, defined compression elastomers and an optimised shaft seal location eliminate potential harbourage points for bacteria. This design reduces both cross-contamination risk and the time needed for CIP cycles, cutting cleaning costs while maintaining product integrity and process yield.

Front-loading seal for fast maintenance

Service speed directly affects uptime. The DuraCirc features a truly front-loading single mechanical seal that can be inspected or replaced from the front of the pump without disconnecting any pipework. Full component interchangeability, a single lubricant requirement, and a robust bearing arrangement with increased-diameter duplex shafts all contribute to faster, simpler maintenance. The heavy-duty bearing positioning minimises the risk of pump head contact, further reducing service frequency and supporting continuous process operation.

High inlet pressure ratings across the range

The DuraCirc range spans models from the compact DuraCirc 32 through to the large-capacity DuraCirc 74, with port sizes from 25 mm to 150 mm. Maximum inlet pressures range from 13 bar on the DuraCirc 43 up to 40 bar on the DuraCirc 72, giving engineers flexibility to match the pump precisely to process requirements. The maximum process and CIP temperature across all models is 150 °C, making the DuraCirc suitable for high-temperature cleaning and pasteurisation circuits.

Uni-Fit retrofit port option

The DuraCirc Uni-Fit port option is designed for straightforward replacement of the Alfa Laval SCPP range and other major brands. It matches existing pipework dimensions, so engineers can upgrade to DuraCirc performance without modifying their process lines. This reduces installation time and cost while delivering immediate improvements in efficiency, hygiene, and reliability.

Extended warranty and total cost of ownership

Alfa Laval backs the DuraCirc with an extended 3-year warranty covering all non-wear parts, provided genuine Alfa Laval spare parts are used. Combined with its robust gearcase design, long-life bearings, and easy-access seal arrangement, the DuraCirc is engineered to deliver a low total cost of ownership over its service life. Fewer unplanned stops, shorter maintenance windows, and reduced CIP chemical consumption all contribute to measurable savings in daily operations.