Sigma

Developed for processes ranging from cryogenic temperatures to 500ºF (260ºC), and suitable for sealing virtually every chemical medium across the entire pH range (0-14), SIGMA pairs the outstanding chemical resistance of PTFE with enhanced dimensional stability to improve overall material stress retention. The non-stick properties of the SIGMA range materials offer excellent removal after usage to dramatically reduce the downtime on shutdown.
 
Sigma 500

Biaxially orientated PTFE containing hollow glass microspheres
Colour: Blue

  • Enhanced compressibility for low bolt loads
  • Improved flexibility over conventional calendered and graphite sheets
  • Moderate concentrations of acids & caustics, chlorine and hydrogen peroxide
  • can be used for all concentrations of sulfuric acid
  • WRAS approved for hot and cold potable water services
 
Sigma 511

Biaxially orientated PTFE containing silica
Colour: Fawn

  • Standard compressibility
  • Strong acids (except hydrofluoric) to general chemicals
  • can be used for all concentrations of sulfuric acid
  • Not suitable for molten alkali metals, fluorine gas or hydrogen fluoride
  • WRAS approved for hot and cold potable water services
 
Sigma 533

Biaxially orientated PTFE containing barium sulphate
Colour: Off White (Pigment Free)

  • Standard compressibility
  • Ideal for sealing food, pharmaceutical and other non-contamination applications
  • Strong alkaline solutions to other general chemicals
  • Aqueous hydrofluoric acid below 49%
  • Not suitable for sealing molten alkali metals or fluorine gas
 
Sigma 588

Biaxially orientated PTFE
Colour: Off White (Pigment Free)

  • Highly conformable surface layers designed for glass-lined, FRP, ceramic, plastic and low bolt load applications
  • Modified PTFE inner core design to maximize saleability and prevent blow-out
  • FDA compliant
 
Sigma 600

100% Pure PTFE
Colour: White

  • Designed to replace older conventional gasket technologies
  • Uniform tensile strength make it a replacement material for both metallic and non metallic flange applications
  • Suitable for use with hydrogen fluoride
  • Complies with FDA requirements
 
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