進口派克液壓馬達TE0045FS110AAABTG0170AS010BBBD能控制液壓系統(tǒng)在達到調(diào)定壓力時保持恒定狀態(tài)。用於過載保護的溢流閥稱為安全閥。當系統(tǒng)發(fā)生故障，壓力升高到可能造成破壞的限定值時，閥口會打開而溢流，以*保*系統(tǒng)的安全。(2)減壓閥：能控制分支回路得到比主回路油壓低的穩(wěn)定壓力。減壓閥按它所控制的壓力功能不同TE0050AM260AAAB
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，又可分為定值減壓閥(輸出壓力為恒定值)、定差減壓閥(輸入與輸出壓力差為定值)和定比減壓閥(輸入與輸出壓力間保持一定的比例)。(3)順序閥：能使一個執(zhí)行元件(如液壓缸、液壓馬達等)動作以后，再按順序使其他執(zhí)行元件動作。油泵產(chǎn)生的壓力先推動液壓缸1運動，同時通過順序閥的進油口作用在面積A 上，當液壓缸1運動完全成后，壓力升高，作用在面積A 的向上推力大於彈簧的調(diào)定值后，閥芯上升使進油口與出油口相通，使液壓缸2運動。流量控制閥利用調(diào)節(jié)閥芯和閥體間的節(jié)流口面積和它所產(chǎn)生的局部阻力對流量進行調(diào)節(jié)，從而控制執(zhí)行元件的運動速度。
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