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Pressure fluctuation on ACQUITY solvent manager - WKB21265

Article number: 21265

SYMPTOMS

  • Pressure fluctuations
  • Pressure dropout
  • Fails dynamic leak test and Static Leak test

Pressure trace of erratic system pressure:

clipboard_ea22c01a3ee6c9b21ba94bf72d1eb3afa.png

ENVIRONMENT

  • ACQUITY UPLC BSM
  • ACQUITY UPLC H-Class Quaternary Solvent Manager (QSM)

CAUSE

Worn plungers and seals

Residue on plunger     

 

FIX or WORKAROUND

  1. Replace high pressure seals (Part number 700002599 for H-Class pump / 700009135 for I-Class BSM) and seal wash housing seals (Part number 700002598 for H-Class pump / 700006048 for I-Class BSM) in the pump head.
  2. Replace Plunger (Part number 700002600 for H-Class pump and I-Class BSM)

Stable pressure after replacing seals and plunger:

clipboard_e5f7a5b0ef06c454594d96e04816dca25.png

 

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