Defender™ FS

DefenderwithCaptions

The Defenderâ„¢ FS (Fire Safe) sealing/isolating gasket is designed to withstand the rigorous API standard 6FB (Third Edition) test and therefore provides a solution for those who want to electrically isolate their flange while also requiring protection against the potential introduction of fire in and around the flange.
The objective of the test is to monitor the total leakage for the duration of the burn/cool-down cycle and during re-pressurization. Leakage is determined by the total water level drop through a visual sight gauge during the burn/cool-down cycles, by manually catching the water in a calibrated container during re-pressurization.
The results concluded that the Defenderâ„¢ FS Gasket is able to maintain its fire safe characteristics throughout the entirety of the test. During the 30 minute burn and 30 minute cool down period, the measured leakage was 0 ml/min versus the allowable rate of 22.765 ml/min. The leakage rate during the re-pressurization cycle was 5 ml/min versus the allowable rate of 22.765 ml/min.
Based on years of technological experience with Kammpro® core design, the Defender™ FS sealing/isolating gasket not only meets but exceeds the pressure-containing capabilities in standard 6FB (Third Edition) as outlined by API.

  • Tested and certified to API 6FB (Third Edition).
  • Two integral robust sealing elements for sealing and isolating in an engineered fire safe design.
  • Serves as a sealing/isolation for fire safe applications.
  • Incorporates industry proven Kammpro®: sealing technology.
  • Patent Pending Design.

Applications

  • Defender FS gaskets were engineered for fire safe, extreme, high reliability sealing and electrical isolation, critical service applications, high pressure flanges: 2500# or API 10K.
  • Critical/Extreme service.
  • High Ph service.
  • H2S/CO2 service.
  • Locations where end users prefer an integral seal element and high volatile fluids are present.

Sizes

  • 1/2" through 24" diameter (Consult Factory)
  • Available as "F" Type Gasket

Industries (Oil, Gas, Offshore)

  • Production Fields
  • Petroleum Marketing Facilities
  • LNG/SNG Systems
  • Pipeline and Distribution Piping
  • Refineries
  • Tank Farms
  • Offshore Platforms

Gasket/Retainer Material Specifications

ASTM

TEST METHOD

G10S

G11S

D149

Dielectric Strength Volts/Mil Short Time

750-800

550

D695

Compressive Strength (psi)

65,000

63,000

D570

Water Absorption (%)

0.05

0.10

D790

Flexural Strength (psi)

65,000

60,000

D256

IZOD Impact Strength (Ft-lbs/Inch

14.0

12.0

D638

Tensile Strength (psi)

50,000

42,000

D732

Bond Strength (lb)

2,600

2,200

 

Operating Temperature

Cryogenic to 302°F (150°C)

-100°F (-73°C) to 392°F ( 200°C)

NOTE: The operating temperature for gaskets and flange isolation kits is based off the gasket retainer temperature. Seal element temperature does not dictate the minimum and maximum gasket operating temperature. Performance suitability and material compatibility shall be determined by the user. The Defenderâ„¢ FS is an engineered fire safe gasket that has passed API 6FB fire test (Third Edition). No other claims regarding suitability/compatibility for a particular application or performance in a fire are made.


Seal Element Materials

Sealing Element

Operating Temperature

Mica (Hi-Temp)

1,832°F (1,000°C)

Biaxial Oriented PTFE

-450°F (-268°C) to 500°F (260°C)

Kammprofile PTFE Coating

-58°F (-50°C) to 350°F (176°C)



Configurations for Gasket Type and Sleeve and Washer Sets

Type "F" Gasket
Fits within the bolt hole circle of the flange and extends to the I.D. of the bolt circle providing good protection against shorting out of the corrosion mitigation hardware.

    
 


double washer set

Double Washer Set
One isolation sleeve, two steel washers and two insulating washers for each stud/bolt.


Suggested Sleeve/Washer Set

FD = G10 Sleeves, Steel HC Washers and Steel HC Washers - Double Washer Set

 

TF = Nomex Sleeves, Steel HC Washers and Steel HC Washers