1、S型單向閥 特點(diǎn)S型單向閥的作用是使油液只能向一個方向流動而另一個方向止流，如圖1-1所示。管式連接直通單向閥有一個方向無泄漏的封閉有五種開啟壓力板式連接插入式連接 圖1-1 S型單向閥功能說明 S型單向閥閥芯的行程受到卡圈的限制，內(nèi)裝彈簧支承開閉行程并保持閥芯處于關(guān)閉狀態(tài)。S型單向閥為錐閥式結(jié)構(gòu)，壓力損失小，有五種開啟壓力和三種連接方式，管式和板式閥結(jié)構(gòu)如圖2-1和圖2-2所示。該閥主要用于泵的出口處，作背壓閥和旁路閥用。 圖2-1 板式閥結(jié)構(gòu)圖 圖2-2 板式閥結(jié)構(gòu)圖機(jī)能符號型號意義直通式K1K2K3規(guī)格6301889301896301903規(guī)格8301890301897301904規(guī)格1

2、0301891301898301905規(guī)格15301892301899301906規(guī)格20301893301900301907規(guī)格25301894301901301908規(guī)格30301895301902301909直角式K1K2K3規(guī)格6301910301917301924規(guī)格8317701317702317703規(guī)格10301912301919301926規(guī)格15317704317705317706規(guī)格20301914301921301928規(guī)格25301915301922301929規(guī)格30301916301923301930例如：訂6通徑開啟壓力為0.05MPa的直通式插裝閥，訂貨型號為

3、S6K1-301889技術(shù)參數(shù)液壓介質(zhì)礦物質(zhì)液壓油或磷酸酯液壓油介質(zhì)溫度范圍 ()-30+80介質(zhì)粘度范圍 (mm2/S)2.8500工作壓力 (MPa)至31.5開啟壓力 (MPa)見特性曲線最大流量 (L/min)特性曲線（試驗(yàn)條件：在和下測得）外形及連接尺寸（單位：mm）管式閥外型及連接尺寸：規(guī)格681015202530D1G1/4G3/8G1/2G3/4G1G11/4G11/2M141.5M181.5M221.5M272M332M422M482H1222834.541.5536975L15858728598120132T112121416182022S19243036466065重量（

4、kg）0.10.20.30.5122.5插入式閥外型及連接尺寸：NG681015202530D1H710131722283642D2681015202530D3H811141824303844D4681015202530行程4445577L111.211.914.31818.828.528.5L29.59.511.514.51624.525L310161618233137L416.521.523.525.5304347.5L520.526.529.53440.557.563.5L628.536.539.54655.575.583.5重量kg0.050.050.050.10.20.250.3NG

5、681015202530D1H710131722283642D2681015202530D3H811141824303844行程4445577L19.59.511.514.51624.525L219182127292942L321.822.828.836.4445563L429.832.838.848.4597383L518182328334147重量kg0.050.050.050.10.20.250.3板式閥外型及連接尺寸：通徑閥固定螺釘（GB70-85）B口O型圈104-M1040-10.917.122.62204-M1050-10.928.173.53304-M1070-10.934.523.53NGB1B2L1L2L3L4H1H2108566.77842.917.8-66212010279.410160.323-93.531.53012096.812884.22842.1106.546 注意事項(xiàng)：（1）液壓系統(tǒng)用的介質(zhì)必須經(jīng)過過濾，過濾精度至少20m