Do random factors in the quality of stainless steel butterfly valves with the development of basic construction in China, national large-scale implementation project construction, the electric power, petroleum, chemical industry, urban supply and drainage system the number of valves, such as more and more, especially the dosage of the butterfly Industrial Valves is very big. Metal hard seal butterfly valves are produced in our country, from the seal structure can be divided into two categories, one is elastic hard seal structure, the second is multi-level hard seal butterfly valve. Elastic diameter generally below DN500, hard seal butterfly Industrial Valves production of large diameter USES a multi-level structure. Below DN500 butterfly valve dosage the biggest, so users more problems when use it, in this, the problems are generalizations, and guide the correct installation and use of the user to purchase stainless steel butterfly valves do sampling or all of the test is necessary, do sampling observation about the quality of the products is: one is to control the quality of products, the second is to reduce unnecessary maintenance and update after installing the Industrial Valves, install a high success rate at a time. But the user is in when sampling test of hard seal butterfly valve, some didn't pay attention to the places, caused to you that the quality of the produce, doubt or unqualified to refuse. Because of where is it? Screws on the pressure ring according to the diameter size has four, six, eight and 12, the bolt diameter does not exceed the largest M10. This a few screws mostly fixed resilient seated with, can't take all the media pressure, stainless steel butterfly valves installed in the pipeline outer flange bolt after compaction effect, can withstand all the dielectric strength. Due to structural reasons, there was a leak detection operations have different acceptance, users on the grounds that the unqualified notice factory is often the case, after communication products can be passed, and no problems in use. Therefore, matters which should be paid attention to under the validity for the user to better understand and use elastic hard seal butterfly valve for the communication.
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