單向閥又稱止回閥或逆止閥。用于液壓系統中防止油流反向流動,或者用于氣動系統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。

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。

. Suitable for the following brands: Sweden Atlas Copco (Atlas? Science ko), American SULLAIR (SULLAIR), Ingersoll Rand (Ingersoll Rand), deng fu GD CompAir GardnerDenver (JiaDu Denver), Britain (CompAir) FS (fu sheng), Taiwan, Japan HITACHI (HITACHI), KOBELCO BOGE steel (god), Germany (bloomberg), KAESER (Kaiser), bully, xiangyang, liuzhou LiUTEHCH (fidelity), quincy, fox love, bolaite, schneider risheng, superior performance, seiko is force and can be complex, fly and insulted thestandard, tin, wind pressure, and d, ai can, waves, mountains, jaguar, guinness, poly, des, ShenHangJian, han chung, red rings, kettle... Air compressor, such as

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Check Valve Check Valve

Check valves or as a one-way check valve. Used to prevent the reverse flow of oil flow in hydraulic system, or used in pneumatic system prevent the reverse flow of compressed air.

Check valve have straight-through and right Angle type two kinds. Straight-through one-way valve with screw thread connection installed in the pipeline. Right Angle type check valve has a threaded