Working principle: when the internal piping and tank vacuum, atmospheric pressure will be the valve cover, air enters the system, balance the system pressure, eliminate the effect of vacuum.
Barometric pulse could cause stronger disordery degree and better flushing effect by comparing the transfer rates of two pressure waves and pressures caused by valve opening and barometric pulse.
The results show that at any Angle between axes of inclined swirl control valve and crank shift, flow coefficient and inclined swirl ratio increase gradually with increase of valve opening.
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9. 通过实验，得到了SPF型平衡阀的流量与开度间的关系，绘制了理想流量特性曲线。
Through experiment, achieved the relation of the flux and the opening degree of the SPF balance valve, protracted the ideal flow characteristic curve.
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10. 而在正常工艺条件下，调节阀的开度是适中的，即使小开度也是短暂的，所以调节阀可正常安全使用。
In normal conditions, the opening control valve is moderate, even a small opening is short, so the normal valve can be used safely.
Installed in a mainline it prevents upstream pressure from dropping below a preset minimum. Solenoid override of the sustaining function allows for electrical on-off operation.
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12. 按下水泵“开”按钮，泵即运转；然后打开泵的吸入阀。
Press the "Start" button, the pump running, then open the suction valve of the pump.
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13. 顶部排汽阀的开度应调控，以保持连排内的工作压力。
The top steam discharge valve discharge distance could regulate to maintain the working pressure.
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14. 流量控制阀由电动执行器调节开度，可实现远距离控制阀门的开度，以满足系统计量的要求。
The open angle of the flow control valve is adjusted by electric actuator, which can be controlled remotely to meet the requirement of system measure.
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15. 实际应用时，分两步来确定再生调节阀开度。
Two steps are involved to determine the regeneration valve opening in practical application.
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16. 开压井管线阀。
Open the kill line valve.
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17. 当关闭通道时，用阀杆的楔形头使球体涨开与阀座压紧达到密封。
When the closed channel, the wedge-shaped head with a stem to open up the ball and pressed to seal the valve seat.
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18. 软件能够实现节流阀开度调整的一次到位，大大提高了水动力调整的速度和精度。
The software can realize the adjustment of the throttle opening only once. It greatly enhances the speed and the precision of hydrodynamic adjustment.
An algorithm calculating the opening degree of the electronic valve in succession is proposed, and the application in the engineering practice proves that the algorithm has a good control result.
The respective resistance properties for branch pipe were investigated through experiments and GRNN neural network when both conveying velocity and the flow valve opening of branch pipe were changed.
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21. 并通过数学模型对节流阀的开度进行了控制。
The degrees of opening of throttle are controlled through the model of mathematics.
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22. 采用80C196KB控制柴油机微粒过滤器再生时机和再生调节阀开度。
Regeneration opportunity and regeneration valve opening of DPF are controlled by 80C196KB single chip microprocessor.
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23. 执行机构响应从DEH送来的电指令信号，以调节汽轮机各蒸汽阀开度。
Actuator can adjust the opening size of each steam valve by responding to the electro-instruction sent from DEH.
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24. 将控制器的输出作为实际输出来控制调节阀的开度，以达到给定设定目标。
The output of the controller is used as practical output to control valve opening, thus to reach the setting target.
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25. 直流换流站载频噪声干扰，是由换流站交直流换流运行时换流阀开断的暂态过程引起的。
The carder frequency noise interference in the HVDC converter station is caused by the transition of the converter valve switching.
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26. 通过在泵开和关时电磁阀所进行的开启和关闭来操作泵控制阀。
Solenoid operated pump control for controlled opening and closing on pump start-up and shut-down.
The paper investigated the flow distribution of solid phase and the respective resistance properties of branch pipes when both conveying velocity and the flow valve opening of branch pipe are changed.
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28. 采用针阀代替安全阀，实验研究了安全阀进口干度、阀开度对安全阀及下游管路中流动堵塞的影响。
To experimentally investigate it, needle valves and transparent glass tubes with flow channels similar to that of safety valves were used instead of the safety valve.
With the suction superheat kept constant meantime, the valve opening, refrigerant mass flow rates and the cooling capacity between two individual units exhibit a parabola relationship.
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30. 经理论分析计算，确定变速泵理想的转速，确定调节阀理想的开度，调节过程一次完成。
Calculation by theoretical analysis may ascertain the ideal rotate speed of variable-speed pump and ideal opening of regulating valve, completes adjust process at one time.
