螺旋上升的伤口缸

Spiral wound gasket Special features 1.Permanent elasticity in hot-cold cycles. 2.To some degree usable in worn-out, damaged,and deformed flanges. 3.Usable under rough conditions. 4.Approximately 10% spring-back of thickness in the installed state. Can be manufactured to order in nuclear grade according to the Burgmann quality assurance manual and verified with certificates. Materials 1.Gasketing tape:graphite,PTFE 2.Metal spiral:standard grades 1.4541(AISI 321), 1.4571(AISI 316Ti). other materials on request 3.Inner ring: corresponds to material of the metal spiral 4.Outer ring:generally galvanized steel, coating steel. Operating limits Temperature:-200 500oC(Higher temperatures in an inert environment dependent on steelgrade---please enquire) Pressure:up to 400bar(Class 2500) for flanges according to DIN and ASME. (higher pressure on request) Helium tightness to 1.7*10-9mbar.l/s. Resistant to almost all(aggressive) media(pH 0-14).