德國力士樂(lè )R901224247 DA6VP2A50/350FSM壓力切斷閥

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產(chǎn)品簡(jiǎn)介：

力士樂(lè )REXROTH先導式壓力截止閥

DA6V

規格 6

組件系列 5X

大工作壓力 350 bar

大流量 40 l/min

重量   2.2kg

安裝位置   任意

溫度范圍   -30 … +80℃

粘度范圍   10 … 800mm2/s

建議粘度范圍  20 … 60mm2/s

用于底板安裝

油口安裝面符合 ISO 5781-03-04-0-00（不符合標準，且不帶孔）

底板（單獨訂購）

作為插裝閥

調整類(lèi)型：六角套筒和保護帽

4 個(gè)壓力等級

可調式切換壓差（公稱(chēng)值的 10 % 至 50 %）

DA6V 型壓力閥是一種可無(wú)級調節切換壓差的先導式壓力截止閥。此類(lèi)閥主要由擰入式插裝閥的先導控制級和主級、單向閥和殼

體組成。

通過(guò)油口 B 將 P 中的泵流量引入系統的蓄能器中。如果油口 B 中執行機構的壓力超過(guò)設定頂部切換壓力，則先導控制閥將打開(kāi)

并將通過(guò)油口 A (Y) 啟動(dòng)先導油排放。單向閥將關(guān)閉油口 B 至 P 的連接，且泵流量將切換到卸壓油路（從 P 到T）。

型號 DA6VP

將泵流量從 P 至 B（泵 → 執行機構）切換為 P 至 T（泵 → 油箱）。

泵通過(guò)單向閥向液壓系統（P 至 B）供油。通道 B 中的壓力通過(guò)控制油路和孔作用于擰入式插裝閥 的先導控制。同時(shí)，通道 P 

中的壓力通過(guò)孔施加于主控制閥芯的彈簧負載側。當在擰入式插裝閥 中通過(guò)調節主軸設置的頂部截止壓力到達液壓系統（通道 

B）時(shí)，擰入式插裝閥 的先導控制將打開(kāi)從主閥芯的彈簧負載側到控制油路的連接和通過(guò)油口 A (Y) 進(jìn)入油箱的外部連接。由于

存在孔，在主閥芯處產(chǎn)生了壓降。主閥芯將升離閥座，打開(kāi) P 至 T 的連接。單向閥關(guān)閉 B 至 P 的連接，而擰入式插裝閥 的先

導控制在 B 中執行機構壓力的作用下保持在打開(kāi)位置。

將泵流量從 P 至 T（泵 → 油箱）切換為 P 至 B（泵 → 執行機構）。

如果根據在調節主軸處設定的較低底部壓力值，B 中的執行機構壓力與截止壓力相比較有所下降，則擰入式插裝閥 的先導控制

將設置回其初始位置。

這樣，壓力將主閥芯的彈簧負載側累積。從而通過(guò)彈簧關(guān)閉從 P 到 T 的連接，并且泵將通過(guò)單向閥向液壓系統，即從 P 到 B 進(jìn)

行供油。

型號 DA6VA

在此閥型號中，泵壓力口不是在 P 中，而是在 A 中設計的。閥門(mén)將泵流量從 A 引至 P 或從 A 引至 T。泄油口位于 B (Y) 中。

切換過(guò)程與型號“VP”（此閥型號支持油路塊連接）相對應。

注意！

僅限間接壓力限制功能：

泵壓力（至油箱）的壓力限制功能不是直接提供的，而是僅通過(guò)執行機構通道中的單向閥和控制油路間接提供。

設置切換壓差：

出廠(chǎng)時(shí)，閥門(mén)被設置為切換壓差約為公稱(chēng)壓力的 10 % 至 12 %?？梢栽O置為公稱(chēng)壓力的 50 %。

交付時(shí)，調節主軸被設置為小可調節頂部切換壓力，即將調節主軸擰出到限位止擋。

通過(guò)擰入調節主軸，可增大頂部切換壓力。

通過(guò)擰入調節主軸，可增大底部切換壓力而切換壓差將減小。通過(guò)擰出調節主軸，可減小底部切換壓力而切換壓差將增加。

通過(guò)鎖緊螺釘和鎖緊螺母 確保壓力調節。

應用注意事項：

在壓力截止閥和液壓蓄能器之間建立一個(gè)低流阻的短連接。

注意！

僅可使用合適的蓄能器安全設備操作蓄能器！

泵壓力（至油箱）的壓力限制功能不是直接提供的，而是僅通過(guò)執行機構通道中的單向閥和控制油路間接提供。

注意： 切換壓差出廠(chǎng)設置

出廠(chǎng)時(shí)，閥門(mén)被設置為切換壓差約為公稱(chēng)壓力的 10 % 至 12 %，并且是在已卸壓狀態(tài)（調節主軸擰出到限位止擋，請參閱產(chǎn)

品說(shuō)明）下提供的。

調節是在公稱(chēng)壓力、泵流量約為 10 l/min、執行機構流量約為 2 l/min 的條件下實(shí)現的。

不同的系統條件（尤其是泵流量和執行機構流量很高時(shí)）可能導致較高的切換壓力。在這里，通過(guò)此閥可以選擇性地調節系統

切換壓差。

德國力士樂(lè )REXROTH壓力切斷閥訂貨號和型號：

力士樂(lè )REXROTH先導式壓力切斷閥DA 6 V

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