Spiral Wound Gaskets

Components:

• Metallic strip - holds the filler
• Filler - flows under pressure filling the imperfections and creating sealability for the gasket.
• Guide ring-holds the filler and metallic strip in the proper position.

Materials used:

• Metallic strip - 0.006" thick, Stainless Steel 304, 304L, 316, and 316L. 'L' specifies low carbon content. Other materials are available upon request.
• Filler types -

  • Flexible graphite - temperature depending on applications:
    • Steam and hydrocarbons - 1200° F.
    • Oxygen service(if sealing element is totally enclosed) 930°F
    • Oxidizing services - +600° F
    • Gasket must be enclosed.
    • Oxidizing agents are nitric acid and sulfuric acids, chromium, chlorine acids and liquid alkaline metals.
    • Fire safe.
  • PTFE - higher chemical resistance is required - 500°F maximum.
  • MICA graphite - asbestos replacement - 660° F maximum.
    • Do not use in refineries, chemical plants or any flamable media
• Guide ring - carbon steel and electro-plated, standard thickness 0.125" (1/8")
  

  • Inner ring - used in high pressure applications to avoid over compression. Not standard on spiral wounds gaskets. The inner ring is made of the same type of materials as the guide ring.


Information required for ordering -

• Thickness - Standard IS 0.125"(1/8")
• Flange Size- 0.5", 0.75", 1.0", 1.5", 2.0", 2.5", 3.0", 3.5", 4.0", 5", 6", 8", 10", 12" up to 60"
• Pressure class - 150LB, 300LB, 600LB, 900LB, 1200LB.
• Type of filler
• Material used for metallic strip
• Inner Ring?(is one required)

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