Spiral wound gasket for the semi-metallic resilient gasket in the best gaskets, V-shaped or W-shaped by a thin strip with a variety of fillers (graphite, asbestos, PTFE) alternately entwined, its structure can be based on the density Different locking force required to produce and use both inside and outside steel ring to control the maximum compaction degree, gasket contact surface of flange sealing surface less precision. Especially suitable for uneven loads, easy to relax the engaging force, temperature and pressure changes periodically, where there is an impact or vibration. Are valves, pumps, heat exchangers, towers, manholes, hand holes and other static sealing flange connections originals widely used in petrochemical, machinery, electric power, metallurgy, shipbuilding, medicine, atomic energy and space sectors. Main use: Suitable for large diameter pressure vessel (such as heat exchangers, reactors, etc.) flange sealing a metal strip material A. 0.15mm ~ 0.25mm thickness using the 08F, 0Cr13, 0Cr18Ni19Ti, 0Cr18Ni9Ti, 00Cr18Ni10 , 0Cr18Ni12Mo2Ti, 00Cr17Ni14Mo2 such as cold-rolled steel strip, or negotiated by both parties. B. preformed metal strip is V-shaped or W-shaped narrow, the surface should be smooth. Clean, there should be rough, cracks, scratches. Defects such as pits and rust C. Stainless steel hardness value HV ≤ 200 D. General strip width is 3.2mm, 4.5mm.8mm 2. nonmetallic material A nonmetallic filled with special asbestos tape, flexible graphite tape, Teflon tape, non-asbestos fiber tape, ceramic fiber and mica, etc. . With a thickness of 0.3-1.0mm. B. Special asbestos LOI must be ≤ 25% C. metal straps ≤ 100PPM D. chloride ion content of various media and various non-metallic belt recommended temperature and pressure E. General of the strip width is 3.2mm , 4.5mm.8mm temperature: temperature graphite spiral wound gasket asbestos spiral wound gasket -200-850 ℃ temperature -200-500 ℃