Metal spiral wound gasket (basic) using high-quality SUS304, SUS316 ("V" shaped or "W" shape) and other metal alloys with graphite, asbestos, PTFE, non-asbestos and other soft materials overlapping spiral wound made at the beginning and end of the way with the spot metal straps. Metal spiral wound gasket (basic) using high-quality SUS304, SUS316 ("V" shaped or "W" shape) and other metal alloys with graphite, asbestos, PTFE, non-asbestos and other soft materials overlapping spiral wound made at the beginning and end of the way with the spot metal straps. 1 A. metal band with a thickness of 0.15mm ~ 0.25mm of 08F0Cr13, 0Cr18Ni19Ti, 0Cr18Ni9Ti, 00Cr18Ni10, 0Cr18Ni12Mo2Ti, 00Cr17Ni14Mo2 such as cold-rolled steel strip, or determined by the supply and demand sides negotiated. B. preformed metal strip is V-shaped or W-shaped narrow band, the surface should be smooth. Clean, there should be rough. Cracks. Scratched. C. defects such as pits and rust stainless steel hardness values ??HV ≤ 200 2. Non- A non-metallic metal band filled with a special asbestos, flexible graphite tape, Teflon tape, non-asbestos fiber tape, and mica, etc. With a thickness of 0.3-1.0mm. B. Special asbestos LOI must be ≤ 25% C. The chloride ion content of non-metallic belt recommended temperature and pressure ≤ 100PPM D. various types of media and a variety of non-metallic belt