valve seating

Pumping Efficiency Affected by the Seating Time of Valve Ball

阀球入座时间对抽油泵泵效的影响

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keep the valve seating from being worn by means of metal-plane sealing. good sealability and long service life.

采用金属平面密封使阀座无磨损，具有良好的密封性能和使用寿命。

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Butterfly Check Valve seating may be affected by normal system turbulence.

正常系统湍流可能会影响到蝶式止回阀的阀座.

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Transitional process of an electromagnetic valve actuation ( EVA) is studied with experimental method to reduce valve seating velocity.

以一个发动机电磁气门驱动（EVA）装置为对象，采用试验方法研究EVA过渡过程。

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The flat bottom gate provides full perimeter seating against the seat, eliminating pocket in the bottom of the seat that can trap process media and prevent the valve from fully closing.

平坦的闸板底部与阀座之间能够实现全周长阀座密封，避免阀座出现可能淤积流体介质、妨碍阀门完全关闭的底部洞隙。

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The seating performance evaluating indicators were proposed. The control of valve seating velocity and holding force was investigated.

提出了气门落座特性的评价指标，研究了气门落座速度和落座保持的控制方法。

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A Study on A Measuring System for Needle Valve Seating Time Lag in Electromagnetic Injector

电磁式喷油器针阀落座滞后时间测量系统的研究

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The influence of engine speeds and valve gaps on the valve seating force has been examined.

讨论了转速与气门间隙对落座力的影响。

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Back seating helps minimize outboard leakage when the valve is in the open position.

当阀门处在开启位置时,反向固定有助于将外部泄漏减到最小.

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Under the valve spring preload and seating impact force, the deformation at the site of contact accumulated more and more big, eventually leading to the valve seat fatigue failure.

气门座圈在预紧力和落座冲击力的共同作用下，在接触部位变形累计越来越大，最终导致气门座疲劳破坏。

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This paper describes the principle of measuring needle valve seating time in electromagnetic injector, then presents the constitution and measuring procedure of a measuring system for needle valve seating time lag in electromagnetic injector and analyses the measuring error in the system.

阐述了电磁式喷油器针阀落座时刻的检测原理，介绍了一种电磁式喷油器针阀落座滞后时间测量系统的组成和测量过程，并对系统的测量误差进行了分析。

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Its design features include a double check valve assembly to assure positive, dependable seating protection.

这种结构特点在于包括一个双止回阀总成,确保积极 、 可靠的密封保护.

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The electromagnetic valvetrain is known as a novel fully flexibly variable valvetrain with simple structure, quick system response, and excellent valve seating performance.

作为一种新型的全可变配气机构，电磁驱动配气机构具有结构简单、响应速度快、落座特性好和调节灵活等优点。

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