Filters & Frits

It is good practice to filter your solvents to prevent pump damage. Our 316 stainless steel filters provide that protection.

• Large surface areas prevent pump cavitation
• Disposable 2 µm, 10 µm, and 20 µm pore sizes available
• General use and prep filters for higher flow applications

Why Use An Inlet Solvent Filter?

• To filter out particulate matter from the solvent that may otherwise damage expensive hardware. (Use a 10 µm or 20 µm version for this purpose. The A-309 and A-230A filters have an added “Bottom of the Bottle™” feature to help draw solvent to within 1/8” of the bottom of your solvent bottle.)
• To prevent particulates originating from the sparging system from entering the mobile phase reservoir and to help disperse the sparging gas efficiently. (Use a 2 µm filter for this purpose.)
• To hold your tubing in place at the bottom of the bottle. (Most stainless steel filter options work best for this purpose.)

Note: It is usually a good idea to change the inlet filter as part of your semi-annual or annual preventative maintenance program.

Ordering informations

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Stainless Steel Bottom-of-the-BottleSolvent Filters

• Draws solvent from within 1/8” of the bottom of the bottle
• Replaceable stainless steel filter cups
• Versions for 1/8” and 3/16” OD tubing
• Materials of construction: PEEK, ETFE, and 316 Stainless Steel

Patented Stainless Steel Bottom-of-the-Bottle Solvent Filter Assemblies feature a 2 µm or 10 µm replaceable stainless steel filter cup and a design that allows solvent to be drawn from within 1/8” of the bottom of your solvent bottle. The filter cups are inexpensive and easy to replace, making this an economical, trouble-free choice.

All-PEEK Bottom-of-the-Bottle Solvent Filters

• Most recommended filtering unit 100%
• PEEK polymer construction
• Easy operation — no fittings required

Ordering informations

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It is specifically designed to help prevent particulate contamination from clogging sensitive equipment. It is ideally suited for placement along the flow path line between the pump and injection valve/autosampler.

• Specially engineered for inline filtration
• Versions include Micro, Standard, and Semi-Preparative
• Bio-inert and stainless steel options offered
• Variety of porosities, application appropriate

Standard Inline Solvent Filters

• For 1/16” OD tubing
• Versions for Standard HPLC (6,000 psi/414 bar) and UHPLC (25,000 psi/1,725 bar)
• Replacement frits availableVersions for Standard HPLC (6,000 psi/414 bar) and UHPLC (25,000 psi/1,725 bar)
• Help prevent particulate contamination from clogging sensitive equipment
• Ideally suited for placement along the flow path line between the pump and injection valve/autosampler

Biocompatible Standard Inline

• Filters 0.5 µm and 2 µm versions available
• Features 100% PEEK flow path

Ordering informations

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Precolumn Filters offer secure protection for analytical columns in HPLC and UHPLC. All versions feature a 10-32 coned ports for 1/16” OD tubing.

Standard Precolumn Filters

• Economical protection for larger columns and injections
• Traditional versions connect tubing on both sides
• Direct-connect versions attach to the inlet port of most standard columns
• All versions feature 10-32 coned ports for 1/16” OD tubing

These are designed to protect columns by filtering out particulate matter originating from the sample or from rotor seal wear.

• Assemblies that begin with the letter “A” are traditional versions for standard HPLC
• Assemblies that begin with “VHP” are direct-connect versions for UHPLC applications
• Versions that begin with “9085” are direct-connect for standard HPLC and must be used with polymer fittings

Biocompatible Precolumn Filters

• Pre-assembled with either 0.5 µm or 2 µm porosity frits
• Great column protection
• Feature PEEK bodies and PCTFE-surrounded PEEK frits

The bodies of these filters are manufactured from biocompatible PEEK polymer and are pressure rated to 5,000 psi (345 bar). These filters are designed for use with 1/16” OD tubing, which can be connected to these filters using standard Fingertight fittings.

Ordering informations

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Stainless Steel Frits

Analytical-scale 316 Stainless Steel Frits are available in 0.5 µm or 2 µm porosity— the most common HPLC filtration ratings. Each frit includes a PCTFE or PEEK polymer sealing ring. Choose the larger diameter faces and/or larger porosity frits for faster flow rates. Choose frits with a smaller diameter face and/or smaller porosity for applications sensitive to extra flow path volume.

0.5 µm Stainless Steel Frits

2 µm Stainless Steel Frits

PEEK Frits

PEEK Frits offer exceptionally uniform porosity. This property ensures longer filtration life and consistent frit-to-frit swept volumes. The PEEK polymer frit discs are biocompatible and inert to most solvents, making them well-suited for bioanalytical applications. PEEK’s robust properties make these products suitable for low and high pressure applications.

Disc rings, included on all PEEK frits, are made of PCTFE and are slightly thicker than the frit disc, providing enhanced sealing and excellent chemical resistance. PCTFE surrounded PEEK frits can be used up to 80 ºC.

• Inert, biocompatible, and metal-free
• Uniform porosity, longer filtration life
• Sealing rings manufactured from PCTFE

0.5 µm PEEK Frits

2 µm PEEK Frits

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