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Teflon Filters
(Polytetrafluoroethylene Filters) (PTFE)

 

  • Chemically resistant


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  • Hydrophobic


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  • Low background, interference-free chemical determinations


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  • Low tare mass for accurate gravimetric results


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  • Autoclavable


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  • Meet OSHA, NIOSH, and EPA method specifications

SKC PTFE filters are strong and completely resistant to acids, bases, and all solvents. Use PTFE filters when sampling in aggressive environments. A low chemical background makes PTFE filters ideal for sampling low concentration contaminants. Naturally hydrophobic, PTFE filters feature a low tare mass for accurate gravimetric determinations SKC PTFE filters are temperature-stable to 527 F (275 C). The maximum operating temperature for Teflon filters with PMP support ring is 464 F (240 C). PTFE filters are prone to static effects. For the most accurate sampling use a static eliminator.

 

Ordering Information    

Diameter (mm) Pore Size
(µm)		 Support Pad Included Notes Qty. Cat. No.
13 5.0 No unlaminated 100 225-17-03
25 0.5 No with PTFE support 100 225-2708
25 1.0 No with laminated PTFE support 100 225-2714
25 2.0 No with laminated PTFE support 100 225-2726
25 3.0 No with PMP support ring †‡ 50 225-1711
25 5.0 No unlaminated 50 225-1728
37 0.3 No PTFE, not-sterilized *
for Anthrax and SARS, available in ready-to-use preloaded cassettes		 100 225-1722
37 0.45 Yes on polypropylene support 100 225-17-04
37 0.5 No with PTFE support and hole for Respicon™ Sampler 50 225-1762
37 1.0 Yes on polypropylene support 100 225-17-01
37 1.0 No with PTFE laminated support 50 225-2705
37 2.0 Yes with laminated PTFE support
 50 225-27-07
37 2.0 No with PMP support ring ‡ 50 225-1709
37 5.0 Yes unlaminated 50 225-17A
37 10.0 No unlaminated 100 225-1729
47 0.5 No with laminated PTFE support 50 225-2753
47 1.0 No with laminated PTFE support 50 225-2749
47 2.0 No with PMP support ring ‡ 50 225-1747
47 2.0 No with laminated PTFE support 50 225-2748
47 5.0 No unlaminated 100 225-1724
47 60.0 No unlaminated 100 225-1755
† Recommended for use with the Button Sampler
* Recommended for Anthrax and SARS
‡ The maximum operating temperature for Teflon filters with PMP support ring is 464 F (240 C)

 

Filter/Cassette Solvent Compatibility Chart (HTML)

Filter/Cassette Solvent Compatibility Chart (PDF)

Filter FAQs

 

Specialty PTFE Filters for the Respicon™ Sampler

Specialty PTFE Filters 
Diameter (mm) Pore Size
(µm)
Support Pad Included Notes Qty. Cat. No.
37 0.5 No with PTFE support and hole for the Respicon™ Sampler 50 225-1762

 


Preloaded PTFE Filters
All SKC preloaded filters are in SureSeal* leak-free cassettes

Ordering Information    
Diameter Filter and Cassette Specifications Qty. Cat. No.
25 mm PTFE, 1.0 µm with PTFE support and porous plastic pad loaded in conductive 2-pc cassette 50 225-1725
25 mm PTFE, 1.0 µm with polypropylene support pad preloaded into 2-pc goblet-style black conductive cassette 50 225-1751
25 mm PTFE, 1.0 µm with cellulose support pad preloaded into 2-pc goblet-style conductive cassette 50 225-1716
25 mm PTFE, 2.0 µm filters with 60 µm laminated support and polypropylene support pad preloaded into 2-pc goblet-style black conductive cassette 50 225-1750
37 mm PTFE, 0.3 µm, unsterilized 3-pc cassette banded, recommended for Anthrax and SARS 50 225-1723
37 mm Zefluor PTFE, 1.0 µm with 60 µm laminated PTFE support, preloaded in a 3-pc, clear styrene (traditional style) cassette, banded 50 225-1715
37 mm Zefluor PTFE, 2.0 µm with PTFE support, 2-pc opaque plastic cassette with spacer ring, banded 50 225-1713

* SureSeal leak-free cassettes require the use of a SureSeal Cassette Opener 225-13-5A

Filter/Cassette Solvent Compatibility Chart (HTML)

Filter/Cassette Solvent Compatibility Chart (PDF)

PTFE for Anthrax and SARS

NIOSH is currently using non-sterilized PTFE filters to sample for Severe Acute Respiratory Syndrome (SARS). These filters are also suitable for sampling Anthrax.

Diameter (mm)
Pore Size (µm)
Notes
Cassette Description
Qty.
Cat. No.
37 0.3 not sterilized** filters only 100 225-1722
37 0.3 not sterilized** 3-pc styrene 50 225-1723
** Sterilization is not required because analysis is very specific and does not have interferences.

Filter/Cassette Solvent Compatibility Chart (HTML)

Filter/Cassette Solvent Compatibility Chart (PDF)

 

TecTip Logo

A typical filter will have a rough side and a shiny side. The shiny side is easier to read under a microscope, therefore, expose the shiny side to the air for microscopic analysis. The rough side holds dust more effectively; expose the rough side for gravimetric analysis.

Filter FAQs

Custom Filters Available

For specific applications, SKC will manufacture filters to meet your specific requirements. Download the Custom Filter Order Form in PDF format. Complete the form and fax it to your SKC representative, or contact your SKC representative, or call the SKC Sales Department at 724-941-9701 for more information.

Custom Filters Order Forms (PDF Format)

This page was last modified April 2, 2008
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This site was last modified May 15, 2008
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