Valves requiring processing in the Clean Room should first be assembled prior to cleaning, subjected to cracking and reseat pressure, and flow tested in the flow outside the clean environment.

• 要求在绝对无尘室处理的阀门首先必须在清洗前进行组装，经过裂化及复位施压，然后在清洁环境下的流体中作流动测试。