Skip to main content
Waters

Alliance 2695 pressure drops - WKB31221

Article number: 31221

SYMPTOMS

  • System pressure drops during isocratic analysis; delta 200 psi
  • Dry prime and wet prime do not solve the issue
  • Sonicating check valves does not solve the issue

ENVIRONMENT

  • Alliance 2695
  • Alliance e2695
  • Alliance 2795
  • Alliance 2690
  • Alliance 2790

CAUSE

Check valve obstruction

FIX or WORKAROUND

  1. Replace check valves. Use the correct type:   
    • PerformancePLUS CV Cartridges, R/S, 1/8-in (700000254)
    • Check Valve Cartridges, R/S, 1/16-in (WAT270941)
    • PerformancePLUS CV Cartridge, Ceramic, 1/8-in (700002399)
    • Check Valve, Ceramic (700002333)
    • For 2790/2795, also replace Check Valve Cartridge, Ceramic, 1/16-in (700002761)
  2. Confirm that no more pressure drops are present.

ADDITIONAL INFORMATION

 

Not able to find a solution? Click here to request help.