Durlon® iGuard™ 7910

Durlon® iGuard™ flange Isolation and sealing systems consist of all the necessary components to seal and electrically isolate between flanges, from general service to severe service applications. Gaskets are available in Raised Face (Type F), Full Face (Type E), and RTJ (Type D) flanges from NPS 1/2” (DN15) to NPS 144” (DN 3600) or equivalent, to meet all international piping sizes.

iGuard™ 7910: The iGuard™ 7910 style isolation gasket is manufactured from aramid/inorganic fiber material specifically developed to meet the requirement of NSF/ANSI 61 (Certification for water treatment products that are manufactured, distributed, or sold in North America) for potable water application 23°C (73°F) to commercial hot 82°C (180°F). This kit comes standard with one 3mm (1/8”) thick genuine iGuard™ 7910 gasket, two isolating Nema grade G-10 washers, two SAE zinc plated steel backup washers, and one Nema grade G-10 sleeve tube for every bolt/stud. Maximum pressure class – 300#ANSI.

Industries

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Durlon® iGuard™ flange Isolation Kits are available for the following applications: Oil & Gas, Pulp & Paper, Petro Chemical, Refining, Water & Wastewater, Food & Beverage, Marine, Aerospace and LNG.

The standard iGuard™ kit consists of a gasket, isolating washers and isolating bolt/stud sleeves. The gasket/carrier can be constructed of plain phenolic, neoface phenolic, epoxy glass (G-3, G-10 or G-11), epoxy glass (G-10) bonded to 316SS core, Durlon® 7910, 8400, 8500 or 9000. In gaskets with phenolic or glass carrier rings, the double-ogre sealing element provides a reliable concentrated unit load on the flanges using the lowest torquing conditions possible. For other styles, a spring energized PTFE sealing element is used.

CarrierSealing Element
NitrileEPDMVitonPTFE
Plain Phenolic
Neo-Faced Phenolic G-3
Silicone Glass G-7
Epoxy Glass G-10
Epoxy Glass G-11
Durlon® 7910
Durlon® 8400
Durlon® 8500
Durlon® 9000
ASTM Properties 7910 8400 8500 9000 Mylar Plain Phenolic Nitrile Phenolic Virgin PTFE Teflon Hi-Temp Phenolic G-3 Silicone Glass G-7 Epoxy Glass G-10 Epoxy Glass G-11 Critical Service CS
D149 Dielectric Strength, volts/Mil 279 371 297 406 400 500 500 285 550 350-400 550 550 488
D695 Compressive Strength, psi 25,000 25,000 3,500 50,000 40,000 50,000 50,000+ 80,000
D229 Water Absorption, % 1.60 1.60 <.01 0.70 0.07 0.10 0.10 0.08
D257 Insulation Resistance, MegOhms 3.1 x 10^7 4.2 x 10^7 0.1 40,000 40,000 >10^18 46,000 2,500 200,000 200,000 200,000
D790 Flexural Strength, psi 22,500 22,500 72,000 60,000 27,000 60,000 75,000+ 77,000
D256 IZOD Impact Strength, Ft-Lbs/in 1.2 1.2 3.5 12 8 14 12 9.1
D229 Operating Temp °F -100 to 500 -100 to 554 -100 to 548 -350 to 500 100 to +490 -65 to +250 -65 to +175 -350 to +500 -200 to +340 -200 to +430 Cryogenic to +284 Cryogenic to +356 Cryogenic to +500
D229 Operating Temp °C -73 to 260 -73 to 290 -73 to 287 -212 to 260 -75 to 255 -54 to +104 -54 to +79 -212 to +260 -129 to +171 -129 to +221 Cryogenic to +140 Cryogenic to +180 Cryogenic to +260