At present the use of the butterfly valves for more than soft sealed off valve, characterized by simple structure, light weight, easy maintenance, construction costs low;
目前使用的蝶阀多为软密封蝶阀，其特点是结构简单、重量轻、维修方便、成本造价低；
The valve is plate welding, structural short, light weight, simple structure and easy to maintain and use, it's a non-sealed type valve.
本阀门为钢板焊接，结构短，重量轻，结构简单，使用维修方便，为非密封型阀门。
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