德國力士樂R901224247 DA6VP2A50/350FSM壓力切斷閥

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產(chǎn)品簡介：

力士樂REXROTH先導(dǎo)式壓力截止閥

DA6V

規(guī)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(biāo)準(zhǔn)，且不帶孔）

底板（單獨(dú)訂購）

作為插裝閥

調(diào)整類型：六角套筒和保護(hù)帽

4 個(gè)壓力等級(jí)

可調(diào)式切換壓差（公稱值的 10 % 至 50 %）

DA6V 型壓力閥是一種可無級(jí)調(diào)節(jié)切換壓差的先導(dǎo)式壓力截止閥。此類閥主要由擰入式插裝閥的先導(dǎo)控制級(jí)和主級(jí)、單向閥和殼

體組成。

通過油口 B 將 P 中的泵流量引入系統(tǒng)的蓄能器中。如果油口 B 中執(zhí)行機(jī)構(gòu)的壓力超過設(shè)定頂部切換壓力，則先導(dǎo)控制閥將打開

并將通過油口 A (Y) 啟動(dòng)先導(dǎo)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(hào) DA6VP

將泵流量從 P 至 B（泵 → 執(zhí)行機(jī)構(gòu)）切換為 P 至 T（泵 → 油箱）。

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

中的壓力通過孔施加于主控制閥芯的彈簧負(fù)載側(cè)。當(dāng)在擰入式插裝閥 中通過調(diào)節(jié)主軸設(shè)置的頂部截止壓力到達(dá)液壓系統(tǒng)（通道 

B）時(shí)，擰入式插裝閥 的先導(dǎo)控制將打開從主閥芯的彈簧負(fù)載側(cè)到控制油路的連接和通過油口 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 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(dǎo)控制在 B 中執(zhí)行機(jī)構(gòu)壓力的作用下保持在打開位置。

將泵流量從 P 至 T（泵 → 油箱）切換為 P 至 B（泵 → 執(zhí)行機(jī)構(gòu)）。

如果根據(jù)在調(diào)節(jié)主軸處設(shè)定的較低底部壓力值，B 中的執(zhí)行機(jī)構(gòu)壓力與截止壓力相比較有所下降，則擰入式插裝閥 的先導(dǎo)控制

將設(shè)置回其初始位置。

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

行供油。

型號(hào) DA6VA

在此閥型號(hào)中，泵壓力口不是在 P 中，而是在 A 中設(shè)計(jì)的。閥門將泵流量從 A 引至 P 或從 A 引至 T。泄油口位于 B (Y) 中。

切換過程與型號(hào)“VP”（此閥型號(hào)支持油路塊連接）相對(duì)應(yīng)。

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，而是僅通過執(zhí)行機(jī)構(gòu)通道中的單向閥和控制油路間接提供。

設(shè)置切換壓差：

出廠時(shí)，閥門被設(shè)置為切換壓差約為公稱壓力的 10 % 至 12 %。可以設(shè)置為公稱壓力的 50 %。

交付時(shí)，調(diào)節(jié)主軸被設(shè)置為小可調(diào)節(jié)頂部切換壓力，即將調(diào)節(jié)主軸擰出到限位止擋。

通過擰入調(diào)節(jié)主軸，可增大頂部切換壓力。

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

通過鎖緊螺釘和鎖緊螺母 確保壓力調(diào)節(jié)。

應(yīng)用注意事項(xiàng)：

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(shè)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，而是僅通過執(zhí)行機(jī)構(gòu)通道中的單向閥和控制油路間接提供。

注意： 切換壓差出廠設(shè)置

出廠時(shí)，閥門被設(shè)置為切換壓差約為公稱壓力的 10 % 至 12 %，并且是在已卸壓狀態(tài)（調(diào)節(jié)主軸擰出到限位止擋，請(qǐng)參閱產(chǎn)

品說明）下提供的。

調(diào)節(jié)是在公稱壓力、泵流量約為 10 l/min、執(zhí)行機(jī)構(gòu)流量約為 2 l/min 的條件下實(shí)現(xiàn)的。

不同的系統(tǒng)條件（尤其是泵流量和執(zhí)行機(jī)構(gòu)流量很高時(shí)）可能導(dǎo)致較高的切換壓力。在這里，通過此閥可以選擇性地調(diào)節(jié)系統(tǒng)

切換壓差。

德國力士樂REXROTH壓力切斷閥訂貨號(hào)和型號(hào)：

力士樂REXROTH先導(dǎo)式壓力切斷閥DA 6 V

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R901184186 DA6VP2B5X/350FSV

R901224244 DA6VP2B5X/50FSM

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力士樂REXROTH先導(dǎo)式壓力切斷閥DA

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