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Engineering Knowledge Centre

Better inputs lead to better process decisions.

Practical, field-oriented engineering guidance for hygienic and industrial process systems — heat transfer, hygienic pumps, valves, tank cleaning, steam and pharmaceutical water. Written to improve design, service and procurement decisions before equipment selection.

Preventive Maintenance
Equipment lifecycle support

Spares

Plan the right spares before maintenance begins. Explore common service components, understand what determines compatibility and ask DFT to help identify the correct replacement for your installed equipment.

SRU Rotary Lobe Pump

Identify service components for your Alfa Laval SRU rotary lobe pump using the exploded reference and selection checklist below.

01

SRU Rotary Lobe Pump service selection

Exploded SRU rotary lobe pump drawing showing the pump head, rotors, gearbox, shafts and bearing assemblies
DFT-supplied SRU reference · Select to enlarge. Drawing numbers identify positions, not catalogue part codes. The checklist below is not a position-by-position parts list.
SRU Rotary Lobe Pump service selection component listing
Pos.ComponentSelection notes
—Mechanical seals and O-ringsIdentify seal arrangement, face materials and elastomers
—Rotorcase cover sealMatch pump size and cleaning duty
—Rotors and retention componentsConfirm installed rotor configuration
—Shafts and bearingsIdentify against the equipment-specific drawing
—Gearbox lip sealsConfirm location and installed configuration
—Timing gearsSpecialist assessment required; not a universal replacement kit

Confirm components against the installed model and serial number before ordering.

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Selection & service guidance

Seal selection

Confirm the shaft-seal arrangement, face materials and elastomers. A service kit must match the installed pump and process duty.

Pump head and gearbox

Rotors, shafts, bearings and timing gears require model-specific identification. Timing and running clearances must follow the applicable manual; arrange qualified service for internal repairs.

What to send DFT

Share the model, serial number, nameplate photograph, seal details and observed symptoms. Include the pumped product, cleaning conditions and maintenance window.

Safe maintenance planning

Isolate power, depressurise and allow the pump to cool before service. Follow the equipment-specific manual and site safety procedures.

Ask DFT about this Manufacturer reference (opens in a new tab)

Spares support from DFT

Prepare for planned maintenance

Build a critical-spares list around your installed equipment, service history and operational priorities. Review quantities and lead times before a shutdown.

Match the complete configuration

A similar appearance does not confirm compatibility. Model, serial number, size, materials and operating conditions help identify a suitable replacement.

Resolve the cause of wear

Leakage or repeated component failure can indicate an operating or installation problem. Combine replacement with inspection and a review of the equipment duty.

Extending performance: Alfa Laval 360° Service Portfolio. Start-up, Maintenance, Support, Improvements and Monitoring; outcomes: Uptime, Availability and Optimization.

Alfa Laval 360° Service & Maintenance

DFT-designed cover · Video on YouTube (opens in a new tab)