Medium pressure increases toward the valve seat surface and obliquecone sealing surface squeeze is tightening, sealing the better.
正向介质压力增大时阀板斜圆锥表面与阀座密封面挤压越紧，密封效果越好。
2
Medium pressure increases toward the valve seat surface and obliquecone sealing surface squeezed more tightly, sealing the better.
正向介质压力增大时阀板斜圆锥表面与阀座密封面挤压越紧，密封效果越好。
3
The casing comprises a vertically arranged shell taking the shape of a circular obliquecone table, an assorted upper cover and a discharge hole thereof.