德國REXROTH比例放大器對簡化工程機械操作、提高效率和作業精度以及實現智能化作業都有著極其重要意義，其性能進步提高和應用范疇日益拓寬必將使工程機械技巧到較大程度提高。

德國REXROTH比例放大器輸入電壓信號產生相應動作，使工作閥閥芯產生位移，閥口尺寸發生改變并以此完成與輸入電壓成比例壓力、流量輸出元件。閥芯位移也可以以機械、液壓或電形式進行反饋。電液比例閥形式種類多樣、容易組成使用電氣及計算機把持各種電液系統、把持精度高、安裝使用機動以及抗污染能力強等多方面優點，應用領域日益拓寬。近年研發生產插裝式比例閥和比例多路閥充分考慮到工程機械使用特點，先導把持、負載傳感和壓力補償等功效。它出現對移動式液壓機械整體技巧提升重要意義。特別是電控先導操作、無線遙控和有線遙控操作等方面展現了其良應用前景。

型號：

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