VCFS Very Critical, Fire Safe Flange Insulation Gasket by Pikotek

VCFS Very Critical, Fire Safe Flange Insulation Gasket by Pikotek
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Key Features

  • Based on the roven Pikotek VCS insulating gasket platform
  • Provides Complete Flange Electrical Isolation
  • Tandem Seal Technology:
    - Primary Sealing System has 20+ years successful track record.
    -Secondary Sealing System is dual purpose fire safe and backup.
  • Passes API 6FB, 3rd Edition fire test
  • Use in conjunction with cathodic protection systems
  • Mitigates potential flange rotation
  • Provides a tighter seal under low bolt loads
  • 65,000 psi compressive strength
  • 750-800 VPM dielectric strength
  • 0.1% water absorption
  • 50,000 psi tensile strength



The VCFS Flange Insulation Gasket utilizes Pikotek’s standard VCS Flange Insulation Gasket design with its 20 plus year track record of success in sealing Very Critical Service. The FS fireproof version was created by taking a standard VCS configuration and adding a secondary sealing element that is capable of maintaining a seal while subject to a 1500ºF fire. The VCFS combines the VCS’s proven track record of electrical isolation and sealing integrity in aggressive situations with a solution that has fully passed the API 6FB, 3rd Edition fire test.

The VCFS is suitable in all services up to and including ANSI 2500# and is offered for ring type joint (RTJ) flanges from 6”- 24” and raised face flanges from 2”-24”. The VCFS* is designed for service where the cost of joint failure cannot be tolerated and the operator desires both electrical isolation and added sealing integrity in the case of a fire.

The VCFS consists of a PTFE spring-energized primary sealing element and an E-ring secondary seal, all seated in a high-strength metal core upon which an insulating laminate is permanently bonded. Due to its unique pressure activated sealing mechanism, the gasket requires far less bolt stress to seal than other gasket types. In addition, the engineered E-ring will serve as a secondary seal during normal operation and the primary sealing element during a fire.

Note: The “FS” or “Fire Safe” designation denotes only that this gasket has successfully passed the API 6FB fire test. Due to the fact that every fire is unique and many uncontrolled variables are present, no other claims regarding suitability or performance in a fire are made. Each designer, user and/or operator will need to assess their individual situation when deciding to install FS style gaskets. Patent Pending.