How Rotary Lobe Technology Preserves Product Integrity

The Alfa Laval SRU rotary lobe pump has been meticulously designed for applications where maintaining product integrity is paramount. The positive displacement action creates a gentle pumping motion that minimizes shear forces on sensitive media while providing consistent performance regardless of viscosity variations. Standard tri-lobe rotors deliver excellent efficiency and flow characteristics, while optional bi-lobe configurations accommodate products containing large delicate solids that must remain intact throughout processing.

Hygienic Design Features for Food and Pharmaceutical Processing

Every component of the SRU pump that contacts process media is manufactured from W. 1.4404 (AISI 316L) stainless steel with a mechanical surface finish of Ra ≤ 0.8. This construction, combined with EPDM elastomers, ensures full compliance with stringent hygiene requirements. The pump is engineered for effective Cleaning-in-Place (CIP), with specialized rotor designs available for operating temperatures up to 70°C, 130°C, or 200°C for both process fluids and cleaning solutions. The design eliminates crevices and potential contamination points, making it ideal for applications with strict purity standards.

Modular Configuration for Process-Specific Applications

The SRU pump's universal gearbox design provides exceptional versatility, allowing for mounting with inlet and outlet ports in either vertical or horizontal orientations simply by changing the foot position. This adaptability is further enhanced through multiple connection options including industry-standard fittings like DIN11851, SMS, ISS/IDF, and RJT, as well as flanged connections to various international standards. The pump can be ordered with special features like pressure relief valves or heating/cooling saddle jackets when thermal control is required. For complete process integration, the SRU can be supplied as a full unit with baseplate, coupling guard, and motor configured for variable speed operation.

Seal Options for Different Processing Environments

Process security is ensured through multiple sealing options tailored to specific application requirements. The SRU can be equipped with single mechanical seals for standard operations, single flushed seals for applications where crystallization is a concern, or double mechanical seals for maximum containment. For particularly challenging media, packed gland options in both unflushed and flushed configurations provide an alternative sealing solution. Water consumption for flushed seals is minimal at just 0.5 l/min, helping to minimize utility costs while maintaining operational integrity.

Connection Standards for Process Integration

The SRU rotary lobe pump offers exceptional flexibility in process integration through a comprehensive range of connection options. Standard inlet and outlet ports can be specified as screwed male connections compatible with BSP, DIN11851, SMS, ISS/IDF, or RJT standards to match existing piping infrastructure. For higher pressure applications or where required by plant standards, flanged connections to EN1092-1 B1 PN16, ASA/ANSI 150, or BS10E specifications are available. This versatility ensures the pump can be seamlessly integrated into new or existing processing lines without requiring specialized adapters or transition pieces.