又大又硬又黄又刺激的免费视频-国产成人女人毛片视频在线-久久婷婷五月综合色一区二区-91在线一区二区-亚洲精品男人的天堂-香蕉久久久久久-欧美一区二区三区久久-亚洲精品午夜精品-仙踪林少妇高潮在线观看-日韩在线三区-无码精品久久一区二区三区-国产成人午夜在线视频a站-欧美一级淫片-精品av国产一二三四区-日韩一区二区三区在线观看视频

After entering winter, the temperature drops rapidly, the valve often appears the situation of freezing.If left untreated at this point, the pipeline is vulnerable to failure.If it is in some high-risk conditions, accidents may occur.Therefore, the anti-freeze treatment of the valve is very important.

Before the temperature drops, it is necessary to carry out a comprehensive insulation work on the valve device to make "winter preparation".

Get the tools you need: thermal cotton, wire, pliers, box cutter, and a valid gas alarm in the gas area.

Use a box cutter to cut the appropriate insulation cotton to the size of the valve.Use pliers to cut the wire for binding.When wrapping the insulated cotton, tear the insulated cotton slightly so that it goes around the valve handle to better wrap the body.After wrapping the insulation cotton, secure it with wire.

If freezing phenomenon is found during the use of the valve, do not use a wrench or other heavy objects to hit the valve.The correct procedure is to close the valve and defrost it with steam or hot water before opening it.

If the valve is not used for a long time, the medium in the pipe should be completely removed to prevent the pipe and valve from freezing.It is the duty and responsibility of every enterprise to ensure production safety.Valve antifreeze this matter, can be big or small, we must not because of a moment of negligence, caused an irreversible situation.