定位阀 meaning in English

normal value
normal valve

Position seating eliminates stress and potential binding due to thermal expansion of the stem
定位阀座消除了由于阀杆的热膨胀导致的应力和可能的弯曲。
Internal stops provide positive over travel protection for power actuated valves and act as a reference to position the discs in the open and closed positions
内置的止动装置为动力执行机构提供行程保护，并且作为参考坐标在开启和关闭位置定位阀瓣。
Gate valves are offered in two designs : parallel disc and flexible wedge . parallel disc are position seated ; flexible wedge are torque seated when closing
我们提供的闸阀的结构形式具有两种：平行阀瓣和弹性楔形闸板。平行阀瓣为定位阀座密封；弹性楔形闸板在关闭时则是扭矩阀座密封。