Expeller seal combined with packing: this seal type, which is designed according to reliabilistic method by our company, has high performance and reduce leakage of seal to minimum.

• 对某些不允许稀释、不允许加轴封水的特殊工况，单级泵不加轴封水也能正常工作，并可达到无泄漏的效果，只不过会降低付叶轮、减压盖、轴套等零件的使用寿命。