仪表阀是一种管路附件。它是用来改变通路断面和介质流动方向，控制输送介质流动的一种装置。
此外，所有安全卸压阀、支线和仪表管线应进行干燥和吹扫处理。
Also all safety relief valve line branch line and tubing line for instrument will be dried and purged.
安全壳喷淋系统内有两台喷淋泵，喷嘴，喷淋添加箱，许多安全壳隔离阀和相关的管道仪表等。
The containment spray system consists of two pumps, spray ring headers, a spray additive tank, a number of motor operated isolation valves and all necessary piping, instruments etc.
针对反应堆的特殊要求，主氦循环风机的设计包括总体结构、叶轮型式、冷却系统、轴承、测量仪表、电气贯穿件和隔断阀。
The design of the helium circulator involves the overall construction, the impeller type, the cooling system, the bearings, the instrumentation, the electrical penetrations, and the shutoff valve.
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