The design and lectotype of circulating pump, automatic return water switch valve, expansion tank and atmospheric connection pipe in atmospheric hot water heating boiler room are discussed.
对常压热水供热锅炉房的循环泵、回水自动启闭阀、膨胀水箱、大气连通管的设计选型进行了探讨。
Discussion on calculation of hydraulic power in fixing pipe with time-delay and self-closing valve;
装设延时自闭阀管道的水力计算探讨
automatically shutting pressure of needle valve
针形阀自动关闭压力
A SELF-HOLDING ELECTROMAGNETIC VALVE WITH THE FUNCTION OF SELF-CLOSEDOWN WHEN POWER CUTTING AND ZERO CONSUMPTION;
具有断电自关闭功能的零功耗自保持电磁阀
Development and use efficiency of blocking valve in vacuum consumable electrode arc furnace
真空自耗电极电弧炉闭锁阀研制与使用功效
Characteristics of vertical time-lapse self-closing flush valve: they are time-lapse, self-closing, beeline of water route.
立式延时自闭冲洗阀特点：延时自闭、水流路径成“一”字型，有手柄式、按钮式、脚踏式。
Self-closing connect valve can be installed at apron, high and low point draining outlet of depot pipeling.
自闭式接头阀可安装在机坪、库管线的高低点排放出口。
The valve will shut off automatically for safety if any abnormal pressure-reverse happens.
如若阀压管路内介质出现异常反压现象时，本阀将自动关闭，保护管网系统安全。
After draining, close drain valve.
排泄完毕，关闭排泄阀。
Gate valves serve as efficient stop valves with flow in either direction.
闸阀可作为流体双向有效的关闭阀。
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。
Valve Disadvantages: The valve is difficult to close and requires the operator to double close the valve.
阀门的缺点：阀门难以关闭，要求操作者二次关闭阀门。
Characteristics of cross-joint flush valve: they are time-lapse, self-closing, beeline of water route.
卧式冲洗阀特点：延时自闭、可以适应各种水流路径成,有手柄式、按钮式、脚踏式。
Finally, when the other sides of the spacer bars almost move to the press pulley, which will move up and automatically stop its gluing operation.
等间隔框另一侧快要到达压轮时，压轮抬起，离开打胶头时，胶阀自动关闭，停止打胶。
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。
Slowly open upstream shutoff and allow the backflow preventer to fill slowly.
慢慢开启上游关闭阀，让防回流阀慢慢注水。
Analysis on Flow Force of the Hydraulic Poppet Valve with the Moving Cone Based on CFD;
基于CFD的液压锥阀阀芯启闭过程的液动力分析
A Method to Accelevate the Closing Process of The Main Valve Opening of Pilot Relief Valve;
加快先导式溢流阀主阀口关闭过程的方法
The Static Design of Closed-loop System for High-speed Switch Valve Controlled Hydraulic Valve
高速开关阀控换向阀闭环系统的静态设计