Valco Filters for GC - Frit or Screen?

filters

Screens have much higher flow capacity (Cv), but frits are the best choice for maximum filtration or if your application requires Hastelloy C or titanium. However, since they are thicker than screens, frits allow more mixing, and the downside of their superior filtration is that they clog more often than screens.

Note: The difference in thickness also means that frits and screens cannot be used interchangeably in the same fitting body:

  • A frit must always be replaced with a frit
  • A screen must always be replaced with a screen

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Frits and screens have significantly different thicknesses, so they cannot be used interchangeably in the same filter body.