?根據不同的工作壓力和工作環境，在液壓系統中選用不同型號液壓泵，可以提高液壓系統的工作效率和穩定性，節省能量，提高產品質量和產品競爭力此外，液壓回流泵是一種新型節能產品由于回流泵體積小、重量輕，而效率高，因而能廣泛用于各種流體工程機械中。
這類泵的結構簡單：油封和泵內均為一體成型的金屬材料制成（根據材質不同分為鑄造精密泵、玻璃鋼精密泵等）這樣不但可以減少油封的損壞，而且由于流體工程機械中泵內的壓力表處于真空狀態，泵內無氣，泵內介質較少，相對地減小了體積和重量；油泵有真空泵、真空流量調整裝置和真空輔助裝置等部件；另外由于液體是靜止的和流動的，不需要潤滑，因此在設計、制造時都很省油。
低噪聲，無污染，有良好的耐溫性能，并能改善電機的運行特性，可在苛刻條件下工作噪音極小，不會污染工作環境效率高流量能控制在標準規格范圍內低功耗運行平穩 由于油泵的輸入油量與出口油量一致，因此可根據用戶需要靈活地調節其流量。
這種泵的主要特點是，對壓力調節范圍較大，且不受流量限制，且不需要對設備進行改造如無液流量監測系統或儀表裝置，壓力過高時只能調整油壓；壓力過低時則又需增加液量泵的主要結構是：用彈簧來保持動平衡以防止振動；泵腔里有若干個工作腔。
活塞在運動中產生著巨大的推力并將其作用于氣缸壁而產生著反作用力當活塞受到徑向力時就會有一部分被吸進氣缸內，另一部分又通過一個工作腔繼續運動，所以活塞向外產生著作用力；活塞在缸蓋內運動時，其行程相當于泵的輸出量（流量）的百分比。
90-R-055-KA-1-AB-60-D-4-S1-L-03-FAC-42-42-24-F078 90R055KA1AB60D4S1L03FAC424224F078 90-R-055-KA-1-AB-60-L-3-C6-C-03-GBA-42-42-20 90R055KA1AB60L3C6C03GBA424220 90-R-055-KA-1-AB-60-L-3-S1-D-03-GBA-35-35-24 90R055KA1AB60L3S1D03GBA353524 90-R-055-KA-1-AB-60-P-3-C6-C-03-EBC-35-35-30 90R055KA1AB60P3C6C03EBC353530 90-R-055-KA-1-AB-60-P-3-S1-C-03-GBA-35-35-24 90R055KA1AB60P3S1C03GBA353524 90-R-055-KA-1-AB-60-P-3-T1-C-03-EBC-26-26-24 90R055KA1AB60P3T1C03EBC262624 90-R-055-KA-1-AB-60-P-3-T1-C-03-GBA-26-26-24 90R055KA1AB60P3T1C03GBA262624 90-R-055-KA-1-AB-60-P-4-S1-C-03-GBA-17-17-20 90R055KA1AB60P4S1C03GBA171720 90-R-055-KA-1-AB-60-R-3-S1-C-00-GBA-26-26-24 90R055KA1AB60R3S1C00GBA262624 90-R-055-KA-1-AB-60-R-3-S1-D-03-FAC-38-38-24 90R055KA1AB60R3S1D03FAC383824 90-R-055-KA-1-AB-60-S-3-C6-C-03-GBA-35-35-24 90R055KA1AB60S3C6C03GBA353524 90-R-055-KA-1-AB-60-S-3-C6-C-04-GBA-42-42-20 90R055KA1AB60S3C6C04GBA424220 90-R-055-KA-1-AB-60-S-3-S1-C-02-GBA-35-35-24 90R055KA1AB60S3S1C02GBA353524 90-R-055-KA-1-AB-60-S-4-S1-D-03-GBA-35-35-24 90R055KA1AB60S4S1D03GBA353524 90-R-055-KA-1-AB-60-S-4-S1-D-09-GBA-35-35-24 90R055KA1AB60S4S1D09GBA353524 90-R-055-KA-1-AB-80-L-3-S1-B-03-GBA-35-35-24 90R055KA1AB80L3S1B03GBA353524 90R055-KA-1-AB-80-P-4-C6-C-04-GBA-35-35-24 90R055KA1AB80P4C6C04GBA353524 90-R-055-KA-1-AB-80-P-4-C6-C-04-GBA-35-35-24 90R055KA1AB80P4C6C04GBA353524 90-R-055-KA-1-AB-80-P-4-C6-D-03-GBA-35-35-24 90R055KA1AB80P4C6D03GBA353524 90-R-055-KA-1-AB-80-P-4-S1-C-00-GBA-14-14-24 90R055KA1AB80P4S1C00GBA141424 90-R-055-KA-1-AB-80-P-4-S1-C-03-GBA-29-29-24 90R055KA1AB80P4S1C03GBA292924 90-R-055-KA-1-AC-60-L-3-S1-D-03-GBA-42-42-24 90R055KA1AC60L3S1D03GBA424224 90-R-055-KA-1-AC-60-P-4-S1-C-03-GBA-17-17-20 90R055KA1AC60P4S1C03GBA171720 90-R-055-KA-1-BB-60-D-3-C6-L-03-GBA-38-38-22 90R055KA1BB60D3C6L03GBA383822 90-R-055-KA-1-BB-60-L-3-S1-C-03-GBA-35-35-24 90R055KA1BB60L3S1C03GBA353524 90-R-055-KA-1-BB-60-L-4-S1-C-03-GBA-35-35-24 90R055KA1BB60L4S1C03GBA353524 90-R-055-KA-1-BB-60-R-3-C6-D-00-GBA-35-35-24 90R055KA1BB60R3C6D00GBA353524 90-R-055-KA-1-BB-60-R-3-C6-D-03-GBA-26-26-24 90R055KA1BB60R3C6D03GBA262624 90-R-055-KA-1-BB-80-P-3-S1-D-00-GBA-42-42-24 90R055KA1BB80P3S1D00GBA424224 90-R-055-KA-1-BC-60-L-3-C6-C-03-GBA-35-35-24 90R055KA1BC60L3C6C03GBA353524 90-R-055-KA-1-BC-60-L-3-S1-C-03-GBA-35-35-24 90R055KA1BC60L3S1C03GBA353524 90-R-055-KA-1-BC-60-L-4-S1-C-00-GBA-26-26-24 90R055KA1BC60L4S1C00GBA262624 90-R-055-KA-1-BC-60-P-3-C6-C-03-GBA-38-38-24 90R055KA1BC60P3C6C03GBA383824 90-R-055-KA-1-BC-60-P-4-S1-C-00-GBA-26-26-24 90R055KA1BC60P4S1C00GBA262624 90-R-055-KA-1-BC-60-P-4-S1-D-03-GBA-38-38-24 90R055KA1BC60P4S1D03GBA383824 90-R-055-KA-1-BC-60-R-3-C6-C-03-GBA-35-35-24 90R055KA1BC60R3C6C03GBA353524 90-R-055-KA-1-BC-60-R-3-C6-D-02-GBA-42-42-24 90R055KA1BC60R3C6D02GBA424224 90-R-055-KA-1-BC-60-R-3-C6-D-02-GBA-42-42-24-N180 90R055KA1BC60R3C6D02GBA424224N180 90-R-055-KA-1-BC-60-R-3-C6-D-04-GBA-42-42-20 90R055KA1BC60R3C6D04GBA424220 90-R-055-KA-1-BC-60-R-3-S1-B-03-GBA-38-38-24 90R055KA1BC60R3S1B03GBA383824 90-R-055-KA-1-BC-60-R-3-S1-C-03-GBA-35-35-24 90R055KA1BC60R3S1C03GBA353524 90-R-055-KA-1-BC-60-R-3-S1-C-03-GBA-38-14-24 90R055KA1BC60R3S1C03GBA381424 90-R-055-KA-1-BC-60-R-4-S1-C-03-GBA-32-32-24 90R055KA1BC60R4S1C03GBA323224 90-R-055-KA-1-BC-60-S-3-C6-C-03-EBC-45-45-24 90R055KA1BC60S3C6C03EBC454524 90-R-055-KA-1-BC-60-S-3-C6-D-03-GBA-35-35-24 90R055KA1BC60S3C6D03GBA353524 90-R-055-KA-1-BC-60-S-3-S1-C-03-GBA-20-20-24 90R055KA1BC60S3S1C03GBA202024 90-R-055-KA-1-BC-60-S-3-S1-C-03-GBA-23-23-24 90R055KA1BC60S3S1C03GBA232324 90R055-KA-1-BC-60-S-4-C6-C-03-GBA-35-35-24 90R055KA1BC60S4C6C03GBA353524 90-R-055-KA-1-BC-60-S-4-C6-C-03-GBA-35-35-24 90R055KA1BC60S4C6C03GBA353524 90R055-KA-1-BC-60-S-4-S1-D-02-GBA-42-42-24 90R055KA1BC60S4S1D02GBA424224 90-R-055-KA-1-BC-60-S-4-S1-D-02-GBA-42-42-24 90R055KA1BC60S4S1D02GBA424224 90-R-055-KA-1-BC-80-L-3-C6-D-03-GBA-35-35-24 90R055KA1BC80L3C6D03GBA353524 90-R-055-KA-1-BC-80-P-3-S1-C-03-GBA-32-32-24 90R055KA1BC80P3S1C03GBA323224 90-R-055-KA-1-BC-80-P-4-S1-C-00-GBA-21-21-24 90R055KA1BC80P4S1C00GBA212124 90-R-055-KA-1-BC-80-P-4-S1-C-03-GBA-14-14-24 90R055KA1BC80P4S1C03GBA141424 90-R-055-KA-1-BC-80-S-3-S1-C-03-GBA-23-23-24 90R055KA1BC80S3S1C03GBA232324 90-R-055-KA-1-BC-80-S-4-S1-C-03-GBA-20-20-24 90R055KA1BC80S4S1C03GBA202024 90-R-055-KA-1-BC-80-S-4-S1-C-03-GBA-38-38-24 90R055KA1BC80S4S1C03GBA383824 90-R-055-KA-1-CD-60-D-4-C6-L-03-FAC-42-42-24-F078 90R055KA1CD60D4C6L03FAC424224F078 90-R-055-KA-1-CD-60-L-3-S1-C-03-GBA-23-23-24 90R055KA1CD60L3S1C03GBA232324 90-R-055-KA-1-CD-60-L-3-S1-C-03-GBA-35-35-24 90R055KA1CD60L3S1C03GBA353524 90-R-055-KA-1-CD-60-P-3-C6-C-03-GBA-35-35-24 90R055KA1CD60P3C6C03GBA353524 90-R-055-KA-1-CD-60-P-3-S1-C-03-GBA-35-35-20 90R055KA1CD60P3S1C03GBA353520 90-R-055-KA-1-CD-60-P-4-C6-C-03-GBA-26-26-24 90R055KA1CD60P4C6C03GBA262624 90-R-055-KA-1-CD-60-P-4-C6-C-03-GBA-38-38-24 90R055KA1CD60P4C6C03GBA383824 90-R-055-KA-1-CD-60-P-4-S1-C-03-GBA-38-38-24 90R055KA1CD60P4S1C03GBA383824 90-R-055-KA-1-CD-60-R-3-S1-C-03-GBA-20-20-24 90R055KA1CD60R3S1C03GBA202024 90-R-055-KA-1-CD-60-S-3-C6-D-03-GBA-35-35-24 90R055KA1CD60S3C6D03GBA353524 90-R-055-KA-1-CD-60-S-3-S1-C-00-GBA-20-20-24 90R055KA1CD60S3S1C00GBA202024 90-R-055-KA-1-CD-60-S-3-S1-C-03-EBC-23-23-24 90R055KA1CD60S3S1C03EBC232324 90-R-055-KA-1-CD-60-S-3-S1-C-03-GBA-20-20-24 90R055KA1CD60S3S1C03GBA202024 90-R-055-KA-1-CD-60-S-3-S1-C-03-GBA-23-23-24 90R055KA1CD60S3S1C03GBA232324 90-R-055-KA-1-CD-60-S-3-S1-D-03-GBA-35-35-24 90R055KA1CD60S3S1D03GBA353524 90-R-055-KA-1-CD-60-S-4-C6-D-00-GBA-38-38-24 90R055KA1CD60S4C6D00GBA383824 90-R-055-KA-1-CD-80-L-3-S1-B-03-GBA-35-35-24 90R055KA1CD80L3S1B03GBA353524 90-R-055-KA-1-CD-80-L-4-S1-C-00-GBA-14-14-24 90R055KA1CD80L4S1C00GBA141424 90-R-055-KA-1-CD-80-L-4-S1-C-03-GBA-20-20-24 90R055KA1CD80L4S1C03GBA202024 90-R-055-KA-1-CD-80-L-4-S1-D-03-GBA-26-26-24 90R055KA1CD80L4S1D03GBA262624 90-R-055-KA-1-CD-80-P-3-C6-C-03-GBA-32-32-24 90R055KA1CD80P3C6C03GBA323224 90-R-055-KA-1-CD-80-P-3-C6-C-03-GBA-42-42-24 90R055KA1CD80P3C6C03GBA424224 90-R-055-KA-1-CD-80-P-3-C6-D-04-GBA-42-42-24 90R055KA1CD80P3C6D04GBA424224 90-R-055-KA-1-CD-80-P-3-S1-C-00-GBA-40-40-24 90R055KA1CD80P3S1C00GBA404024 90-R-055-KA-1-CD-80-P-3-S1-C-00-GBA-42-42-24 90R055KA1CD80P3S1C00GBA424224 90-R-055-KA-1-CD-80-P-3-S1-C-03-GBA-42-42-24 90R055KA1CD80P3S1C03GBA424224 90-R-055-KA-1-CD-80-P-3-S1-D-00-GBA-29-23-24 90R055KA1CD80P3S1D00GBA292324 90-R-055-KA-1-CD-80-P-3-S1-D-00-GBA-29-29-24 90R055KA1CD80P3S1D00GBA292924 90-R-055-KA-1-CD-80-P-3-S1-D-00-GBA-38-38-24 90R055KA1CD80P3S1D00GBA383824 90-R-055-KA-1-CD-80-P-3-S1-D-00-GBA-42-42-24 90R055KA1CD80P3S1D00GBA424224 90-R-055-KA-1-CD-80-P-4-S1-C-00-GBA-14-14-24 90R055KA1CD80P4S1C00GBA141424 90-R-055-KA-1-CD-80-P-4-S1-C-02-GBA-26-26-20 90R055KA1CD80P4S1C02GBA262620。
