设计特点Design features
1、低平台设计，可加装支架，连接执行器
Bracket can be added to connect the actuator.
2、防吹出阀杆设计Blow-out proof stem
3、弹簧加载的浮动阀座设计
Design of spring loaded floating valve seat.
4、单向密封设计One way seal design
标准规范Standard specification
设计标准 Design:GB/T 21385
面间距离Face to Face:GB/T 12221
法兰标准Flange:HG/T 20592
试验标准Inspection: GB/T 26480
