Customer: Analytical Chemistry Instrument Manufacturer
Application: High-performance liquid chromatography (HPLC) pumps

Issues:

  • Compatibility with abrasive saline solutions and wide range of solvents required
  • Sealing needed on a very smooth sapphire plunger
  • Consistent friction and long life required

Solution

  • Custom Variseal® FW with extended heel, Zurcon® Z80 seal material and heavy load slantcoil spring

The specified seal, made from UHMWPE, provides excellent wear resistance and long life while the slantcoil spring imparts the force necessary to create a consistent, leak-free seal with consistent friction.

HPLC Pumps