This paper calculates, analyses and determines the pressure point of maximum of ouput power and saving-energy efficiency of differential pressure and Limited pressure variable displacement pump.
本文计算、分析、确定了限压式变量系和差压式变量泵输出功率最大值和节能效率最大值的压力点；
The way to ensure water flow of air cooled heat pump chiller was introduced. The application of differential pressure flow switches in air cooled heat pump modular chiller was studied.
分析了模块式风冷热泵冷热水机组水流量保证的方法，研究了压差式流量开关在模块式风冷热泵冷热水机组中的应用。
In this article, the factors that affect the max. permissible differential pressure of Roots vacuum pump are discussed. The methods of increasing it are discussed together.
文章分析了影响提高罗茨真空泵最大允许压差因素，提出了解决方法。
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