闸阀和截止阀(金属与金属连接)阀座不具备不透气关闭的性能。

Gate and globe metal to met seats cannot provide bubble tight shut-off.

本闸阀暗转在介质为水的管路上，作为启闭设备使用。

These gate valves are ideal for closing and opening the flow in water pipelines.

所有压力密封闸阀都可以配置实心硬楔形闸板。订购时请指定型号55006。

All pressure seal gate valves are available with a solid wedge. Specify figure number 55006.

论述球铁高压燃气闸阀的概况、设计要点、壳体浇铸工艺性的改进和试验方法。

The general description, main points of design, technological improvements in valve body casting and test methods of the said valve are discussed.