The price of vacuum pneumatic butterfly valve. Is the No. 2 port open or closed- Shanghai Dongfeng Pump Valve Factory - 上海花千坊_上海龙凤花坛_夜上海最新论坛

The price of vacuum pneumatic butterfly valve. Is the No. 2 port open or closed?

The price of vacuum pneumatic butterfly valve. Is the No. 2 port open or closed?

Precautions for application of closed water experiment
Application methods and precautions of water shutoff
1. Check whether the appearance is clean, whether there is dirt attached, and whether it is intact. Fill a small amount of air to check whether there is an air leak in the parts and the center. If it is sure that it is normal, it can enter the pipeline and stop blocking operation.
2. Inspection of pipeline: before plugging, check whether the inner wall of the pipeline can be smooth and lubricated, and whether there are sharp objects such as protruding burrs, glass, stones, etc. If there are any, remove them immediately to avoid puncturing. After being put into the pipeline, place them to a certain extent, and do not twist them, so as to avoid gas explosion.
3. Inflate, stop inflation with a pump, and inflate until it fits the pipe wall. Do not inflate consciously to avoid damage.
4. After use, the external surface shall be cleaned immediately, and it can be put into a dry and cool place in front of the surface without attachment after inspection.
5. Storage and maintenance are the same as "pipe plugging"

 Pneumatic butterfly valve

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