美國(guó)派克PARKER比例伺服閥D1FPE50FA9NS00XG204

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D31FHE02C1NB0048升級(jí)成D31FCE02DC1NB70

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D81FHE02H4NS0048升級(jí)D91FCE02HC4NS70

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D31FHE01C4NB0047新型號(hào)是D31FCE01DC4NB70

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D91FHE01E1NE0047停產(chǎn) D91FCE01EC1NE70替代流量稍大

D41FHB31C4NE0O  新型號(hào)D41FCB31CC4NE70  

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D41FHB31F4NE00  新型號(hào)D41FCB31FC4NE70 

D41FHE01C4NE0048新型號(hào)D41FCE01CC4NE70

D1FBE32CC0NK7019C16 導(dǎo)閥

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D41FHE01C2NB0048升級(jí)D41FCE01CC2NB70 新型號(hào)

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比例閥是一種新型的液壓控制裝置。在普通壓力閥、流量閥和方向閥上，用比例電磁鐵替代原有的控制部分，按輸入的電氣信號(hào)連續(xù)地、按比例地對(duì)油流的壓力、流量或方向進(jìn)行遠(yuǎn)距離控制。比例閥一般都具有壓力補(bǔ)償性能，輸出壓力和流量可以不受負(fù)載變化的影響。