SN Series (SN040-SN3600)
Allweiler SN Series (SN040-SN3600) — Heavy-duty fuel oil transfer, industrial fuel systems, large capacity applications.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Establish baseline vibration signature using accelerometers (typically <0.3 inch/sec for three-screw pumps); monitor bearing temperatures (must not exceed 120°C); inspect for spindle wear or misalignment
Verify discharge pressure against specification (ALLFUEL max 40 bar, SN max 100 bar, SM max 120 bar); check pressure relief valve calibration (set 10% above operating pressure); inspect for spindle or liner wear
Monitor antifriction bearing temperature regularly and replace if service life exceeded (>2 years); inspect mechanical seals for leakage (SiC/SiC types standard); verify shaft seal integrity in dry-run conditions
Verify operating viscosity within pump specification (ALLFUEL: 1-1750 mm²/s, SN: 1-5000 mm²/s); check fluid temperature (must not exceed 150°C for most models); inspect inlet strainers for blockage
Visual inspection for fuel oil weeping at mechanical seal locations; verify torque on mounting bolts and flange fasteners; test seal integrity before extended operation; replace packing glands if external leakage observed
Type-general inspection and maintenance points for this equipment category — not model-specific.
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