关于某种闸阀的一段描述？ pressure seal valve & through conduit gate valve： psb valve are designed for high temperature, high pressure and special working conditions such as power plant. excellent sealing together with minimum maintainace are popular by customers. it’s covered with different sizes and rating from 1500lb-2500lb with rf&bw ends. through conduit gate valve is mainly used for oil&gas pipelines services with its features of dbb structure. it has two types that with through conduit and without slab gate valve. 压力自密封阀门和 直通式闸阀 ：psb阀门是专门为高温、高压以及诸如电厂这样的特殊工况而设计的，因其极好的密封性和很少需要进行维护的特性而大受客户欢迎。psb阀门的种类涵盖了1500lb-2500lb范围的磅级以及各种口径的 突面法兰/raised face 及对焊端阀门。含有双阻断双泄放功能的 直通式闸阀 主要被用于石油及天然气 的长输管道。它有两种形式，带直通闸板和不带平板的闸阀。 查看更多
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