下阀盖 bottom flange
下阀杆 Lower Stem ; Stem
水下阀操纵器 subsea valve operator
地面控制的井下阀 downhole surface-operated valve
上、下阀体 Upper Body Down Body ; Upper and lower body
地下管道阀 Culvert valves ; Culert ales ; Culvert t valves
液下控制阀 buried valve with key
按下阀门 Tap Water
井下安全阀 [油气] subsurface safety valve ; SCSSV ; SSSV ; DHSV
下阀杆上的螺纹是处在潮湿气流中的。
The threads on the lower valve stem are in the wetted gas stream.
下阀杆是被从阀座上物理地推开，而不是被弹簧举起来。
The lower stem is physically pulled away from the seat instead of being lifted away by the spring.
当上阀杆沿着它的螺纹上下运动时，通过机械连接带着下阀杆一起运动。
When the upper stem rides up and down on its threads it now moves the lower stem by a mechanical connection.
应用推荐