Sealing Isolation

DEFENDER™

The DEFENDER™ sealing/isolating gasket system is designed for extreme, high reliability sealing and electrical isolation critical service applications. Manufactured with a 316 stainless steel core retainer and laminated on both sides with high strength laminates, the DEFENDER™ gasket is resistant to deforming under load and is used when electrical isolation and corrosion control are required on pipes containing gas, natural gas, oil and other hydrocarbon based medias up to 392ºF (200ºC). Available for flat face, raised face and ring type joint flanges, the DEFENDER gasket is an engineered solution for trouble-free operation that eliminates costly leaks and provides a solution for fugitive emissions.

  • Gasket Type: E or F
  • Seal Element: Spring-Energized PTFE or Viton O-Ring
  • Gasket Retainer: G10, G11
  • Core Options: 316SS, Inconel 625/825, Duplex 2205/2507, Hastelloy
  • Pressure Class: Up to ANSI 2500#, API 10K or PN420 
  • Offered as Tandem Seal for subsea and 10K applications
  • Tested to Shell Certification Standards
  • Size Range: 1/2” to 60” (including corresponding API and DN diameters)
  • Temperature Range (°F): Cryogenic-303°F (G10), -100-392°F (G11)
  • Temperature Range (°C): Cryogenic-186°C (G10), -73-200°C (G11)