QH型切换阀是两个弹簧式安全阀并联，具有同一进口。
The QH type safety valves are composed of two spring loaded safety valves paralleling. There is only one inlet.
设计的切换阀可使试样及空气定量注入，并能准确间隔试样带。
A new valve is designed to inject the sample and the bubbles into the carrier stream quantitatively.
检查位于燃油输送泵前的三通燃油切换阀，并转换到MDO侧。
Check 3-way fuel oil selection valve located before fuel oil pump unit and change the 3-way valve to MDO/MGO side.
另一个三通切换阀的通口与 排渣管连通；膜分离组件侧壁设提取液出液口；
An extract liquid outlet is arranged on the side wall of the membrane separating component, and an upper port of the membrane separating component is communicated with a cover of the storage tank.
除了需要常规自动进样器的六通切换阀，还设计了一个直接进样阀（DIV）用于自动进样器。
In addition to a six-way valve used in conventional autosamplers, a direct injection valve (DIV) was de- signed and used in the autosampler.
柱切换是指利用多通路切换阀改变进样阀与色谱柱、色谱柱与色谱柱、色谱柱与检测器之间的连接关系的技术。
The technique of column-switching could alter the connections between injection valve and column, column and column, column and detector.
本发明提供了用于切换阀的电动驱动系统，该切换阀具有这样的驱动系统，并且本发明提供了包括该切换阀和该驱动系统的再生式热氧化器。
Electric drive for a switching valve, the switching valve having such a drive, and a regenerative thermal oxidizer including the switching valve and drive system.
提出了伺服阀的位置控制和颤振的控制关系上采用可切换的双通道控制形式的设计思想。
In dealing with the relationship of the servo valve position control and the adaptive control, the Double-loop control is adopted.
该阀具有很高的切换速度和频率，可以用来作为大流量高速开关阀的先导控制阀，也可以在小流量回路中直接作为控制阀使用。
It has the higher switching speed and frequency and can be used as the pilot valve for a larger flow rate valve, or as a direct control valve for small flow rate hydraulic loop.
结果表明：适当降低流过蓄热体的气体流速，缩短四通换向阀的切换时间，可降低烟气的出口温度，提高系统的余热回收率。
Result shows that decreasing fluid rate and shortening switching time can decrease the temperature of the exhaust gas and increase the recovery rate of waste heat.
通过大量实验，优化了分析过程的色谱最佳条件，找准了六通阀的切换时间；
Through many experiments, the chromatographic optimum conditions in the analyzing procedure and the precision switching time of the six-port valve were defined.
首次提出了一种称为低温阀切换式脉冲管制冷机的新型制冷装置。
A new type of refrigerator called pulse tube refrigerator with low temperature switching valve is suggested for applications such as gas separation and liquefaction.
经过DCS与变频控制技术的结合应用与研究，实现了生产过程控制中调频电机与调节阀的无扰动切换。
Integrating application and research technology of DCS and frequency inverter, realize switchover without interference between control valve and frequency-inverter motor in producing process control.
对该汽油机采用的可变进气系统的歧管直径和长度、控制阀开关的切换转速等结构参数进行了优化设计。
Structure parameters of its variable intake system, such as diameter and length of intake manifold, switching speed of control valve switch, etc. , are optimized.
介绍了高温空气发生器的工作原理与特点，提出了采用可编程序控制器(PLC)控制四通阀周期切换的控制方案。
The principle and characteristics of the high temperature air generator is introduced. The PLC control project of periodical shift of the cross valve is expounded.
高温空气成份几乎不受四通阀切换瞬间发生器内滞留烟气的影响。
The air component isn't influenced by the residual fume at the switching moment.
微电脑自动控制电动排渣阀，根据杂质含量可任意设置过滤周期和排渣时间，全自动操作，同时还设置了备用的手动切换功能。
The filtration cycle and slag discharge time of dumping dregs valve is controlled by microcomputer automatically according to impurity content, and it has reserve manual switching function.
由于这种阀在柱子切换方面限制太死，所以采用了另一种阀。
Because of the severe limitations of this valve in respect of column switching, it was replaced by another kind of valve.
试验项目包括旁通阀控制试验、主给水阀控制试验和旁通阀与主给水阀的切换试验。
Items of the tests are following: control test with the bypass valve, control test with the major feedwater valve and change-over test between bypass valve and major feedwater valve.
在每次测量前需要手动标定X - Y记录仪的坐标以及切换测试项目间的油路，测试曲线绘制完成后也需要手动计算电液伺服阀的各项性能参数。
Before the test, the coordinates of the X-Y recorder are demarcated and the shifts of the test oil circuit are done manually. The parameters of the characteristics are also computed manually.
根据汽轮机阀切换动作原理，延长了阀切换时间，减小阀切换时的机组负荷晃动现象。
According to the valve switching principle, the switching time was prolonged to decrease the unit load hunting.
工作状态切换后可以停止通电，电机磁极与步进电机磁转子自保持可保证工作状态稳定，降低了阀自身的能耗。
The self-holding of a motor pole and the magnet rotor of the step motor can ensure the stable working situation, which reduces the energy consumption of the valve.
切换机构上可根据使用介质、温度、压力的不同，配以不同型号的安全阀，以适应不同的工况条件。
According to the medium, temperature and pressure, the switching mechanism may be equipped with various types of safety valves so as to adapt the various working conditions.
通过旋转阀芯使水流在泡沫和水线两档之间随意切换。
The stream can be shifted freely between foam chamber and water line chamber by rotary valve core.
通过旋转阀芯使水流在泡沫和水线两档之间随意切换。
The stream can be shifted freely between foam chamber and water line chamber by rotary valve core.
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