This paper briefly introduces the sealing principle of the screw sealing feed water pump, and deals with its frequent trip problem arising from inadequate pressure difference of seal water.

在对螺旋密封式给水泵的密封原理作简要介绍的基础上，针对其因密封水压差小而导致频繁跳泵的问题进行了讨论。

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Slurry catalyst feed pump used in gas-phase flowing bed process of PE plant is a type of single screw pump with special structure.

聚乙烯装置流化床反应器浆液催化剂加料泵是一种结构特殊的单螺杆泵。

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