上海韋米機電設備有限公司

Z2S6A1-64力士樂單向閥德國進口力士樂REXROTH單向閥

單向閥Check Valve [1] 

單向閥又稱止回閥或逆止閥。用于液壓系統(tǒng)中防止油流反向流動,或者用于氣動系統(tǒng)中防止壓縮空氣逆向流動。

單向閥有直通式和直角式兩種。直通式單向閥用螺紋連接安裝在管路上。直角式單向閥有螺紋連接、板式連接和法蘭連接三種形式。液控單向閥也稱閉鎖閥或保壓閥，它與單向閥相同，用以防止油液反向流動。但在液壓回路中需要油流反向流動時又可利用控制油壓，打開單向閥，使油流在兩個方向都可流動。液控單向閥采用錐形閥芯，因此密封性能好。在要求封閉油路時，可用此閥作為油路的單向鎖緊而起保壓作用。液控單向閥控制油的泄漏方式有內泄式和外泄式二種。在油流反向出口無背壓的油路中可用內泄式；否則需用外泄式，以降低控制油壓力。

單向閥

安裝位置

單向閥就是止回閥 旋啟式止回閥安裝位置不受限制，通常安裝于水平管路，但也可以安裝于垂直管路或傾斜管路上。

注意事項

安裝止回閥時，應特別注意介質流動方向，應使介質正常流動方向與閥體上指示的箭頭方向相一致，否則就會截斷介質的正常流動。底閥應安裝在水泵吸水管路的底端。

止回閥關閉時，會在管路中產(chǎn)生水錘壓力，嚴重時會導致閥門、管路或設備的損壞，尤其對于大口管路或高壓管路，故應引起止回閥選用者的高度注意。

止回閥只供防止各類管路或設備上流體介質逆流的單向啟閉閥。

Z2S 型單向閥是疊加式先導式單向閥。

它用于一個或兩個執(zhí)行元件接口的無泄漏截止，既是是在長時間停機的情況下。

在 A? 到 A? 或 B? 到 B? 方向上自由流動，在相反方向上流動被阻塞。

例如，如果流體以 A? 到 A? 方向通過閥門，則控制閥芯 (1) 被推向 B 側，打開球座閥 (2)，然后將閥體 (3) 推離閥座�，F(xiàn)在，液壓油可以從 B? 向 B? 流動。

為了使球座閥 (2) 能夠安全關閉，控制閥芯 (1) 必須進行液壓釋放（參見油路示例）。

Z2S6A1-64力士樂單向閥德國進口力士樂REXROTH單向閥型號

力士樂REXROTH疊加式液控單向閥Z2S 6

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力士樂REXROTH單向閥，先導式Z2S 32

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