4WREE6E16-2X/G24K4/V比例現(xiàn)貨

黎翔機(jī)電REXROTH德國力士樂銷售部詢價聯(lián)系人：何小姐

REXROTH德國力士樂詢價電話：15072720048

REXROTH德國力士樂詢價 QQ:3206749044

REXROTH德國力士樂詢價郵箱：736567721@qq.comDG5VH82AMUD530
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DG5V-5-2A-T-M-U-H5-20力士樂減壓閥R900582961 ZDR6DP3-4X/150YMV
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R901144763 ZDR6DP2-4X/160YMV/60　　先導(dǎo)式溢流是由先導(dǎo)閥和主閥組成。先導(dǎo)閥實(shí)際上是一個小流量直動型溢流閥，其閥芯為錐閥。主閥芯上有一阻尼孔，且上腔作用面積略大于下腔作用面積，其彈簧只在閥口關(guān)閉時起復(fù)位作用。
　　比例溢流閥是一種閉環(huán)智能控制的溢流閥，其執(zhí)行器可以根據(jù)控制器發(fā)出的模擬信號來調(diào)整閥門開度，是使系統(tǒng)的控制參數(shù)自動保持在設(shè)定的范圍內(nèi)。
　　普通溢流閥與比例溢流閥一樣，都有一個閥芯，閥芯的一端是液壓油產(chǎn)生的壓力，另一端是機(jī)械力。普通溢流閥通過調(diào)節(jié)彈簧力，來調(diào)整液壓壓力。而比例溢流閥是電磁鐵直接產(chǎn)生推力，作用在閥芯上，電磁鐵上的輸入電壓可以在0-24伏之間變化，產(chǎn)生的推力就隨之變化，從而得到連續(xù)變化的液壓壓力。
　　因?yàn)楸壤姶盆F的推力不大，所以直動式比例溢流閥的流量很小，壓力70兆帕?xí)r，流量只有1升/分鐘左右。需要大流量比例閥的時候，要把這個比例閥做先導(dǎo)閥，下面還要配一個大通徑的溢流閥。
　　二、減壓閥
　　減壓閥是利用液流流過縫隙產(chǎn)生壓力損失，使其出口壓力低于進(jìn)口壓力的壓力控制閥。
　　按調(diào)節(jié)要求不同，有定值減壓閥，定差減壓閥，定比減壓閥。其中定值減壓閥應(yīng)用最廣，又簡稱減壓閥。
　　減壓閥由壓力先導(dǎo)閥和主閥組成。出口壓力油引至主閥芯上腔和先導(dǎo)閥前腔，當(dāng)出口壓力大于減壓閥的調(diào)定壓力時，先導(dǎo)閥開啟，主閥芯上移，減壓縫隙關(guān)小，減壓閥才起減壓作用且保證出口壓力為定值。R900331577  DB10G2-4X/350Y W65
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