Priming Ejector
DESMI Priming Ejector — Auxiliary priming system - compressed air powered pump priming for non-self-priming pumps.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Inspect mechanical shaft seal for visible leaks; check seal seat for flatness, cracks, and rubber parts for elasticity loss; measure clearance in seal chamber (typical max 0.4-0.5 mm radius)
Remove and visually inspect impeller for cavitation erosion, wear ring thickness, and dimensional changes; check exchangeable wear plates for scoring or material loss; verify impeller clearances meet specification
Monitor for cavitation noise during operation; inspect impeller inlet surfaces for pitting and erosion patterns; verify suction conditions meet NPSHreq at operating point; check inlet pressure exceeds NPSH requirement
Replace all sealing rubber rings during pump overhaul; inspect bearing clearances; verify bearing housing bolts for tightness; check for discoloration or hardening of rubber components indicating age/heat damage
For Modular S/SA/NSA: verify diffuser passages are clear and not clogged; check priming valve/check valve operation; inspect wear plate for cracks affecting diffuser principle function; test air-liquid mixture handling capability
Type-general inspection and maintenance points for this equipment category — not model-specific.
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