下阀杆上的螺纹是处在潮湿气流中的。
The threads on the lower valve stem are in the wetted gas stream.
下阀芯起开关作用。
请勿操作和阀芯下满负荷连续超过一分钟。
Don't operate and spool under full load over one minute continuously.
注意不要在排出阀关闭的状态下长期运转。
Do not let pump run for long in the circumstance of discharge valve closed.
选择和安装好调节阀，使调节阀在一个高水平状态下运行将是一个很关键的问题。
It's a key problem to choose and fix the control valve well and make it run in high level condition.
我们最好检查一下旁阀。
耳轴设计：在压力下上下支持阀球。
Trunnion Design: Upper and lower supports retain ball under pressure.
安全阀必须安装在当它不在压力条件下的系统中。
The safety valve must be fitted to the system when it is not under pressure.
安全阀必须安装在当它不在压力条件下的系统中。
The safety valve must be fitted to the system when it is not under pressure.
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