Durlon® iGuard™ HT/HC
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™ HT: The iGuard™ HT style isolation gasket is manufactured from 6mm (¼”) thick Nema grade G-10 glass epoxy material incorporating a spring energized PTFE sealing element to prevent cold flow in critical service applications at higher temperatures, under continuous reciprocating movement, with internal pressure surges, and requiring frequent removal and installation such as those found in offshore drilling platforms and natural gas compressor and pumping stations. This design makes the iGuard™ HT ideal for ANSI Class 150 to 2,500 and API Class 3,000 to 10,000 and comes in sizes from NPS ½” (DN 25) to NPS 24” (DN 600) or international equivalents in Type E (full face) or Type F (raised face) configurations. These kits come standard with one iGuard™ HT 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.
iGuard™ HC: The iGuard™ HC style isolation gasket is manufactured from special high-compression 6mm (¼”) thick Nema grade G-10 glass epoxy material incorporating a spring energized PTFE sealing element to prevent cold flow under high pressures. These kits come standard with one iGuard™ HC 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.
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® 8400, Durlon® 8500 or even Durlon® 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.
|Neo-Faced Phenolic G-3|
|Silicone Glass G-7|
|Epoxy Glass G-10|
|Epoxy Glass G-11|
|ASTM||Test Method||Plain Phenolic||Neo-Faced Phenolic||Hi-Temp Phenolic G-3||Silicone Glass G-7||Epoxy Glass G-10||Epoxy Glass G-10|
|D149||Dielectric Strength, volts/Mil||500||500||550||350-400||550||550|
|D695||Compressive Strength, psi||25,000||25,000||50,000||40,000||50,000||50,000+|
|D229||Water Absorption, %||1.60||1.60||0.70||0.07||0.10||0.10|
|D257||Insulation Resistance, Meg/Ohms||40,000||40,000||46,000||2,500||200,000||200,000|
|D790||Flexural Strength, psi||22,500||22,500||60,000||27,000||60,000||75,000+|
|D785||Hardness Rockwell, “M”||85||85||115||105||115||115|
|D256||IZOD Impact Strength, Ft-Lbs/in||1.2||1.2||12||8||14||12|
|D732||Shear Strength, psi||10,000||10,000||18,000||20,000||22,000||22,000|
|Operating Temperature||-54°C to 104°C||-54°C to 79°C||-54°C to 200°C||Cryogenic to 232°C||Cryogenic to 138°C||Cryogenic to 180°C|
|-65°F to 220°F||-65°F to 175°F||-65°F to 392°F||Cryogenic to 450°F||Cryogenic to 280°F||Cryogenic to 177°F|