spiral wound gasket with inner & outer ring antileak of spiral wound gasket includes: antileak ga 01101 basic type spiral wound gasket antileak ga 01102 spiral wound gasket with inner ring antileak ga 01103 spiral wound gasket with outer ring antileak ga 01104 spiral wound gasket with inner and outer ring antileak ga 01105 spiral wound gasket for heat exchanger antileak ga 01106 special shape spiral wound gasket antileak ga 01104 spiral wound gasket with inner & outer ring is identical to the antileak ga 01101, however an inner ring has been inserted to enhance gasket performance and an external guide ring accurately centers gasket on flange face. the inner ring is added to prevent the possibility of the gasket imploding into the pipe during installation, to protect the sealing element from extreme temperatures and mediums, fill the void between flanges to prevent erosion of the flange, and to reduce the possibility of failure. the inner ring is normally made of the same alloy as the winding. the din 2699 standard (german) specifies inner rings in all spiral wound gaskets. inner rings are required for gasket with ptfe filler according to asme b16.20 standards, and considered important for graphite fillers. this profile is normally used in raised and flat faced flanges. the external ring a provides additional radial strength to prevent gasket blowout and acts as a compression stop. this profile is normally used in raised and flat faced flanged. the outer ring is often made of carbon steel (painted or zinc plated to prevent corrosion) but can be made of alloys for higher temperature and more severe medium applications. style construction flange hoop material filler inner & outer material size (mm) thickness (mm) material code v w ga 01101 basic type tongue and groove 304 304l 316 316l 321 ta mon400 inconel etc. asbestos graphite ptfe mica ceramic asb fg ptfe mica cer carbon steel 304，321 316 ta mon400 inconel Φ16-3000 3.2 4.5 4.8 5.5 7.5 ga 01102 with inner ring male and female ga 01103 with outer ring raised face flat face ga 01104 with inner, outer ring raised face flat face ga 01105 for heat exchanger heat exchanger please log on our website for more details of antileak ga 01104 spiral wound gasket with inner and outer ring and other products.