閥門閥體上標示的箭頭方向表示閥門的承壓方向，一般被工程裝置公司作為介質流向符號過錯裝置發生走漏乃引發管路事故；
The arrow direction marked on the valve body indicates the pressure bearing direction of the valve, which is generally used as the medium flow direction symbol by the engineering device company. The leakage of the wrong device and even pipeline accidents are caused;
承壓方向是指該閥門應用于管路工況后的封閉狀態下，閥體箭頭方向為引薦接受壓力的方向，如若過錯裝置，則或許出現閥門封閉不嚴的走漏毛病現象發生。超達的軟密封球閥一般是雙向密封的，一般不標出箭頭，金屬硬密封球閥能夠做到雙向密封，但仍是會有一個方向的密封功能仍是較好一點的，所以也會有標出箭頭，這就是指引薦閥門承壓方向，能夠先咨詢下客戶的意見。
If the valve is not closed tightly under the recommended working condition, the direction of the pressure bearing device may be the direction of the valve. If the arrow is not closed tightly under the recommended working condition, it refers to the direction of the valve. Chaoda's soft seal ball valve is generally two-way sealed, and the arrow is generally not marked. The metal hard seal ball valve can achieve two-way sealing, but there will still be one direction, and the sealing function is still better. Therefore, the arrow will also be marked, which refers to the pressure bearing direction of the valve. You can consult the customer first.
帶有標示箭頭的硬密封蝶閥在管道的不同方位，其箭頭的方向與介質流向均是不一樣的，如在泵房內水泵的出水端，則閥體的箭頭與介質流向是相反的，如在水泵的入水端，則箭頭與介質流向是共同的，如裝置于主管路上的，則箭頭一般順應介質流向等，具體要看工況及裝置方位再定。
For the hard seal butterfly valve with marked arrow, the arrow direction and medium flow direction are different in different directions of the pipeline. For example, at the outlet end of the pump in the pump room, the arrow of the valve body is opposite to the medium flow direction. For example, at the inlet end of the pump, the arrow and medium flow direction are common. If it is installed on the main pipeline, the arrow generally conforms to the medium flow direction. The specific situation depends on the working condition and device orientation.
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