The invention provides a spirally wound
gasket which comprises a supporting ring which is arranged in the inner circle, a positioning ring which is arranged in the outer circle and a sealing layer which is arranged between the supporting ring and the positioning ring. The sealing layer comprises a plurality of
layers of sealing structures which are arranged between the supporting ring and the positioning ring in a stacked mode, a teflon sealing layer which is close to the inner circle and a
graphite sealing layer which is close to the outer circle. Due to the fact that the teflon sealing layer has good acid-base resistance properties, when the teflon sealing layer is used in a pipeline of
medicine liquid in
chemical engineering,
pharmacy and the like in a
medium term or a long term, the delivery pipeline can be easily cleaned, the teflon sealing layer is arranged in the inner layer, and safety of the
medicine liquid in the delivery pipeline is guaranteed. Meanwhile, due to the fact that the
graphite sealing layer has a heat resisting
advantage, the
graphite sealing layer is arranged on the outer portion of the
gasket to improve the heat resisting performance of the whole prepared spirally wound
gasket, the acid-base resistance properties are guaranteed, and meanwhile the property that the inner portion of the delivery pipeline is easy to clean is guaranteed.