Sigma® 500 is a biaxially orientated PTFE material reinforced with hollow glass fibres, designed for sealing tasks requiring low bolt loads. It performs well on delicate, worn, or damaged flanges thanks to its non-stick surface. This gasket material is compatible with a wide range of chemicals across the pH spectrum from 0 to 14, excluding molten alkali metals, fluorine gas, and hydrogen fluoride.
Approved for potable water use under WRAS standards and compliant with FDA and EC food contact regulations.
We offer precision machining to produce standard flange gasket tables, bespoke gaskets, or picture frame gaskets tailored to your needs. For assistance with gasket measurements, please refer to our guide on How to Measure a Gasket. A detailed comparison between our Novus™ and Sigma® gasket materials is available here.
Should you require alternatives, we can supply GYLON® 3504 and Klinger® Top-Chem 2003 gasket materials. Sigma® 500 sheets are available through Henry Gallacher as a trusted supplier.
Applications
Ideal for sealing in chemical environments with pH values from 0 to 14, excluding molten alkali metals, fluorine, and hydrogen fluoride.
Key Features
- Operating temperature range from -250°C to +260°C.
- Maximum pressure rating of 85 bar.
- Suitable for both standard and low bolt load irregular flanges.
- Effective on glass-lined, ceramic plastic coated, or uneven and distorted flanges.
- Complies with FDA regulations.
- WRAS / WRC approved for potable water applications.
Standards
- TA-LUFT approved (1206528).
- DVGW DIN 3533-6 tested.
- Tested in accordance with EC Regulation No. 10/2011.
- WRAS approved for potable water use.
- Meets FDA regulatory requirements.
Availability