The stem rises and lowers as the valve is opened and closed.
当阀门开启或关闭时，阀杆上升或下降。
The lower stem is encased in a spring which forces the stem away from the seat when the valve is opened.
下阀杆包裹在一个弹簧内部，当阀门开启时，弹簧迫使阀杆离开阀座。
Open valve to balance set point as recorded in Step 9.1.
按照步骤9.1的记录将阀门开启到平衡设置点上。
Simulation Study on Hydraulics Characteristic of High Head Lock during Valve Opening Process Based on Dynamic Mesh Technology
高水头船闸阀门开启过程水力特性仿真研究
delayed-action time of discharge
喷射滞后时间灭火器的控制阀门开启或达到相应的开启状态时起
Stand clear of the regulator and valve outlet, while opening the valve.
开启阀门时，躲开调整器和阀门排气口。
The stem position provides indication that valve is opened or closed.
阀杆的高低能够指示阀门处于开启或关闭状态。
Open the valve fully to its memory setting and, on a piece of paper, record the valve setting.
将阀门完全开启到它的记忆设置上，在一张纸上，记录阀门设置。
The metal diaphragms act as the seal at the top of the valve. The primary improvement in this generation of valves is the elimination of the spring used to open the valve.
金属横膈膜在阀门的顶部作为密封。这一代阀门的主要的改进是取消了用于开启阀门的弹簧。
When valve is filled, open the downstream shutoff slowly and fill the water supply system.
阀门注满后，慢慢开启下游关闭阀对水供应系统注水。
Controlled closing of the valve, opens the mainline check valve, gradually increasing line pressure.
阀门受到控制的关闭操作，开启主管线止回阀，逐渐增加管线压力。
The stem position indicates to the observer if the valve is opened or closed.
阀杆位置的高低,指明了阀门处于开启或关闭状态。
Disc, the trim part of butterfly valves, rotates with the stem to open/close and modulate the valve.
蝶阀是随阀杆一起转动的蝶板作启闭件，用以实现阀门的开启，关闭与调节。
An acetylene cylinder valve should not be opened more than approximately1 1 /2 turns.
乙炔钢瓶阀门不能开启得超过大约11/2圈。
The valve may be padlocked in full open or full closed position.
可以把阀门锁定在完全开启或完全关闭的位置。
Small open torque, seat almost without attrition and long serving life.
开启力矩小，密封副无摩擦转动，阀门使用寿命长。
The line pressure required to open the valve is a function of the disc/piston weight and the size of the port diameter.
开启阀门所需要的管道压力取决于阀瓣／活塞的重量和阀门端口直径的综合作用。
Discharges deep well air and debris by being in an open position on pump start-up.
当泵启动时，阀门处于开启状态，排放深井气体和碎片。