Liquid or slurry never touches stem threads.
液体或泥浆绝对不会接触阀杆螺纹。
"In the fully open "back seated"position, the stem threads are protected from the circulation of flow media."
在完全开启的"后阀座"状态下,阀杆螺纹能够避免与流体介质接触。
Non-rising-inside screw stems are used in bronze and iron gate valves.
暗杆－内螺纹结构用于青铜和铸铁闸阀。
Care should be taken for clearance as the stem rises so that threads are not damaged.
当阀杆上升时,要留心阀杆的上方有足够的空间,防止螺纹受到损坏。
Stub acme thread on stem provides rapid open-close operation.
阀杆上的短梯形螺纹适用于快速启闭操作。
Rising stem-outside screw and yoke is preferred in iron multi-turn valves.
明杆－外螺纹和支架结构是铸铁多回转阀门的首选结构。
Non-rotating Stem with precision Acme threads and burnished finish. Valve suitable for horizontal installation.
不旋转阀杆具有精密梯形螺纹和经过抛光的表面光泽度。
Non-rotating stem with precision Acme threads and burnished finish. Double Acme for faster operation.
不旋转的阀杆具有精密的梯形螺纹和抛光光洁度。双梯形螺纹使得操作更加快速。
inside screw lift check valve
内螺纹升降式止回阀
Apply pipe dope sparingly on pipe threads, never on valve threads.
在管道螺纹上涂敷螺纹油，但是不要在阀门螺纹上涂螺纹油。
Discussions on joint studs(thread)intensity calculation for body and bonnet
阀体与阀盖连接螺柱(螺纹)强度计算方法的探讨
grout anchored deformed bar
灌浆锚定的螺纹钢杆
double pin sucker rod
两头阳螺纹的抽油杆
Secondly there is error between thethread roll angles of thread rolling die and drill rod.
滚丝轮螺纹和钻杆螺纹的螺旋角有误差。
Rising stem-inside screw is the most common and preferred design for bronze multi-turn valves.
明杆－内螺纹结构对于青铜多回转阀门来说是最通用、首选的结构形式。
"Face-to-face, centre-to-face, end-to-end and centre-to end dimensions of valves--Mals screw valves"
GB/T15188.4-1994阀门的结构长度外螺纹连接阀门
" Face-to-face, centre-to-face, end-to-end and centre-to-end dimensions of valves--Female screw valves"
GB/T15188.3-1994阀门的结构长度内螺纹连接阀门
The top of retainer must drop just below threads in the valve body.
护圈上方必须放置在阀门阀体螺纹以下。