Replacement Frits

Chrom Tech supplies a comprehensive range of IDEX frits engineered for reliable particle retention and long service life in HPLC and UHPLC systems. Available in PEEK, stainless steel, UHMWPE, and titanium, these precision-manufactured frit discs provide consistent porosity, dependable sealing, and extended filtration performance across analytical and bioanalytical workflows.

IDEX frits are offered in multiple diameters, with or without polymer sealing rings, and in porosities ranging from 0.5 Âµm to 20 Âµm. Many designs incorporate polymer support rings for improved sealing and stability, with select models featuring color-coded rings to simplify porosity identification during installation or replacement. Uniform pore structure ensures predictable flow behavior and long filtration life while helping protect downstream columns and components.

Stainless Steel Frits

Analytical-scale 316 stainless steel frits are available in the most common HPLC porosities—0.5 Âµm and 2 Âµm. Each frit includes a PCTFE or PEEK polymer sealing ring to support secure installation and consistent performance under pressure. Larger diameter faces and higher porosity options support increased flow rates, while smaller faces and finer porosities are ideal for applications sensitive to added swept volume.

PEEK Frits

PEEK frits deliver exceptionally uniform porosity, providing consistent frit-to-frit swept volumes and extended filtration life. These biocompatible polymer frits are inert to most solvents, making them well suited for bioanalytical and sensitive LC applications. PEEK’s mechanical strength supports both low- and high-pressure environments while maintaining stable flow paths and reliable particulate capture.

Chrom Tech stocks a wide assortment of IDEX frits in common sizes and porosities for fast shipment, helping you restore filtration performance quickly and maintain consistent chromatographic results.

IDEX Frit Categories

Choose PEEK or stainless steel frits to match your system pressure, chemical compatibility, and particulate protection requirements.

Key Definitions â–¶
HPLC Frit
A porous filtration disc installed within fittings, filters, or column hardware to retain particulates while allowing mobile phase to flow through, protecting downstream chromatography components.
Porosity
The micron rating of a frit that defines particle retention size. Common HPLC frit porosities range from 0.5 Âµm to 20 Âµm, balancing filtration efficiency with flow resistance.
PEEK Frit
A polymer-based frit offering uniform porosity, chemical inertness, and biocompatibility. PEEK frits provide consistent swept volume and are well suited for bioanalytical and solvent-sensitive applications.
Stainless Steel Frit
A high-strength metallic frit typically manufactured from 316 stainless steel, designed for high-pressure HPLC environments and supplied with polymer sealing rings for secure installation.
Sealing Ring
A polymer support ring integrated with many frit designs to improve sealing, simplify installation, and maintain consistent flow paths—often color coded to identify porosity at a glance.
Frequently Asked Questions â–¶
What porosity frit should I use for HPLC?
The most common HPLC frit porosities are 0.5 Âµm and 2 Âµm. Use 0.5 Âµm for finer particulate protection and sensitive applications, and 2 Âµm when higher flow rates and lower backpressure are preferred.
When should I replace an HPLC frit?
Replace frits when you see increased system pressure, reduced flow, or inconsistent chromatography. Regular replacement helps protect columns and maintain stable system performance.
What is the difference between PEEK and stainless steel frits?
Stainless steel frits are designed for high-pressure analytical systems, while PEEK frits offer chemical inertness and biocompatibility for bioanalytical workflows. Both provide uniform porosity, but PEEK is preferred for sensitive or metal-free applications.
Do polymer sealing rings affect flow performance?
No. Polymer sealing rings are designed to improve sealing and stability without disrupting flow paths. They also help maintain consistent swept volume and simplify installation.
Are IDEX frits interchangeable across different fittings and filters?
Frit compatibility depends on diameter, thickness, and housing design. Always match frit dimensions and material to your specific filter or fitting to ensure proper sealing and performance.