Asbestos rubber plate wrapped with PTFE, strength the features of anticorrossion, a widely used kind of PTFE envelop gaskets. Ⅰ,FeaturesPTFE sandwich spacer is made by asbestos rubber plate wraped with PTFE,which possesses such features as anti-corrossion,and not reaction with dense acid,alkaline,and other oxidant.Ⅱ.Specifications Nominal(Dg)insaidedia(mm)outsidedia(mm)height(mm) Nominal(Dg) ...