The stem seal of a feed water control valve uses expanded graphite packing in order to produce friction and to economize on energy for the control valve working.

电站锅炉给水调节阀的阀杆密封采用柔性石墨填料，既降低了摩擦力，又为调节阀的运行节约了能源。

youdao

This paper focuses on effects of the valve characteristics and the transfer pipe delay on dynamic performance for boiler drum level, under varying valve opening of the feed water control valve.

本文着重探讨当给水调节伐门开度变化时，伐门特性以及管路传输迟延对锅炉汽包水位动态特性的影响。

youdao

The system employs the variable speed regulation of electrically driven feed pump and the regulator valve to fulfill the control of water level.

该系统采用电动给水泵变速调节和调节阀共同完成水位控制。

youdao