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●　反向環流型（HQ）

●　Reverse Circulation Type(HQ Type)

用于飽和蒸汽壓特性曲線陡峭的液體。該類液體在冷卻電機後如果再返回到葉輪進口部位非常容易汽化。HQ型的反向環流通過電機後，從尾部回到進口罐氣化區域。反向環流管內設置調節閥等方式進行節流，保持電機內液體所需要的壓力，同時具有排空管線作用。

Designed for fluids with steep vapor pressure curves which would tend to vapourize if returned to impeller eye after absorbing motor to the vapor zone of the suction vessel.The return line can be adjusted by the throttled valve and the motor chamber pressure highter than the vapour pressure,meanwhile,the line could drain remainder liquid in the reverse line.