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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. Sigma range materials contain non-stick properties that aid in an easy removal process after their usage to dramatically reduce the downtime on shutdown.
Style
Material / Use
Details

Sigma 500

  • Biaxially orientated PTFE
  • containing hollow glass
  • microspheres
  • COLOR: 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
  • COLOR: 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 sulfate
  • COLOR: 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
  • COLOR: 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 sealability and prevent blow-out
  • FDA compliant

Sigma 600

  • Biaxially orientated PTFE
  • COLOR: White
  • Max Temperature: 500°F (260°C)
  • Max Pressure: 1235 psig (8.5 MPa)
  • ASME m: 1.4
  • ASME y: 1595 psi (11 MPa)
  • pH Range: 0–14

For further specifications please call (201) 635-1910