SRU Rotary Lobe Pump

With its smooth, low-shear pumping action, the SRU is Alfa Laval’s core rotary lobe pump for the gentle handling of sensitive process fluids within the dairy, food and beverage, biotechnology and pharmaceutical industries.

Alfa Laval SRU rotary lobe pumps are carefully engineered to provide reliable performance, trouble-free operation and superior energy efficiency for demanding applications. It is an excellent choice for duties that require contamination-proof pumps to meet high standards of hygiene, low-shear and low-pulsation operation. This EHEDG-approved pump handles both Cleaning in Place and Sterilization in place, and can be supplied with thorough documentation to support rigorous validation requirements.

For even more demanding hygienic and ultra-clean duties, Alfa Laval offers the SX rotary lobe pump.

Consistent performance, minimal risk of contamination

SRU rotary lobe pumps are designed with features that maximize performance and minimize the risk of contamination. These include a defined compression front cover sealing, rotor nut retention design, drainable pump head and ultra-clean surface finishes.

Safeguarding product quality

Understanding of flow patterns is vital to ensure high efficiency fluid transfer with low pulsation, low shear and low noise characteristics. Alfa Laval employs Computational Fluid Dynamics (CFD) to establish exact geometry for the rotors and rotor case.

Greater flexibility and application fit

The modular design of the SRU provides greater flexibility to configure exactly the right solution for specific process requirements.

To meet different process requirements, the SRU features an R90 external shaft seal, which may be specified in various materials and configurations in order to ensure the correct shaft seal for the application. Alternatively the SRU can be fitted with Hyclean mechanical seals as well as other seal solutions.

In addition to a broad range of models and capacities available in horizontal or vertical porting, the SRU has a wide selection of options, including standard and custom seals, heating/cooling saddles and jackets, an integrated pressure relief valve and a rectangular inlet for pumping high viscosity fluids.

Robust construction – low maintenance

To deliver reliable operation and low maintenance the SRU features a robust gearbox construction with heavy-duty shafts, torque locking assemblies and taper roller bearings throughout.

Supply and delivery

The SRU range is available with twelve different pump head displacements, flow rates up to 106 m³/h, differential pressures up to 20 bar, temperatures up to 200°C and port sizes from 25 to 150 mm in diameter.

Certification, specification and standards

SRU rotary lobe pumps comply with EHEDG, 3-A, 3.1 and FDA hygienic standards and have ATEX approval for use in explosive environments. For more information, please consult the documentation provided.

Part of a broad range of hygienic pumps

M.A.L Pumps offer a comprehensive range of Alfa Laval pumps for use in hygienic applications. These include:

LKH (the premium centrifugal pump)

Solid C (Standard centrifugal pump)

MR Liquid Ring Pump (Liquid ring and CIP return pump)

SRU Rotary Lobe Pump (Tri-lobe rotary lobe pump)

SX Rotary Lobe Pump (Multi-lobe rotary lobe pump)

Optilobe (Standard tri-lobe rotary lobe pump)

SCPP (Circumferential piston pump)

For the biotech and pharmaceutical industry:

Solid C UltraPure (Standard centrifugal pump)

MR UltraPure (Liquid ring and CIP return pump)