Durlon® iGuard™ 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™ HC: The iGuard™ HC style isolation gasket is manufactured from special high-compression 6mm (1/4”) thick Nema grade G-10 glass epoxy material incorporating a spring energized PTFE sealing element to prevent cold flow under high pressures. This kit comes 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. Maximum pressure class – 2,500# ANSI, 10,000# API.
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||Properties||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||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 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 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|