Specification of HL 404 Spiral Wound Gasket with Inner Ring and Outer Ring
features:
Spiral wound gasket has an outer ring and the inner ring of solid .However been incorporated to improve performance gaskets and external guide ring accurately Center flange gasket on the face. Ring sections are added to prevent possible gasket burst into the pipes during installation, to protect the sealing element from the extreme temperatures and the media, filling the void between the flanges to prevent erosion flange, and to reduce the possibility of failure. The inner ring is usually made of the same alloy with winding. DIN 2699 standards (Germany) set in the ring in all of spiral wound gaskets. the inner ring is required for gaskets with PTFE filler in accordance with ASME B16.20 standards, and are considered important for graphite filler. This profile is typically used in raised and flat face flanges. The external ring provides additional radial strength to prevent gasket explosions and acts as a compression stop. This profile is typically 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 temperatures and more severe media applications.
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