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1·Second check must be drip tight when pressure is applied to downstream side of valve.

当阀门下游一侧出现压力时，第二止回阀必须是无滴漏。

2·The valve bonnet may now be removed. There may be slight leakage as the backseat does not provide a drip-tight seal.

现在可以拆卸阀盖。如果后座无法提供无滴漏密封，则会有轻微的泄漏。

3·The valve bonnet may now be removed. There may be slight leakage, as the metal-to-metal backseating does not provide a drip-tight seal.

现在可以拆卸阀门的阀盖。当金属-对-金属后座无法提供无滴漏密封时，可能会有点泄漏。

4·Open piping attached to a filled tank will not start to drip-leak following installation and test of a Chemtrol Tru-Bloc shut-off valve.

在Chemtrol Tru-Bloc关闭阀安装和测试后，连接到满储的储罐的管道开口将不会开始滴漏。