The spiral wound gasket is made of the metallic moire belt by the pressure casing and the nonmetallic belt that aer superimposing in turn and producing by twining spiral. It can be added by the fortified ring in the case. Because it has multichannel sealing to be able to endurein the high temperture and corosion on the power plant, avation, petroleum and chemical industry and vale, It is cope of application in the steam, hydrogen. Nature gas. And the solution of the petrol. Acid, aldali, salt and so on.