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單向閥是氣流只能一個(gè)方向流動(dòng)而不能反向流動(dòng)的方向控制閥,。其工作原理與液壓?jiǎn)蜗蜷y（*力士樂(lè)液控單向閥）一樣。壓縮空氣從P口進(jìn)入,，克服彈簧力和摩擦力使單向閥閥口開(kāi)啟,，壓縮空氣從P流至A；當(dāng)P口無(wú)壓縮空氣時(shí),，在彈簧力和A口(腔)余氣力作用下,；閥口處于關(guān)閉狀 態(tài)，使從A至P氣流不通,。單向閥應(yīng)用于不允許氣流反向流動(dòng)的場(chǎng)合,，如空壓機(jī)向氣罐充氣 時(shí)，在空壓機(jī)與氣罐之間設(shè)置一單向閥，當(dāng)空壓機(jī)停止工作時(shí),，可防止氣罐中的壓縮空氣回流 到空壓機(jī),。單向閥還常與節(jié)流閥、順序閥等組合成單向節(jié)流閥,、單向順序閥使用,。
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我司主要經(jīng)營(yíng)銷售的品牌有：北京華德HUADE,，*力士樂(lè)液控單向閥，日本不二越NACHI,，日本大金DAIKIN,，中國(guó)臺(tái)灣KOMPASS朝田，中國(guó)臺(tái)灣峰昌WINmost,，中國(guó)臺(tái)灣北部精機(jī)Northman,，中國(guó)臺(tái)灣久岡Jeougang，中國(guó)臺(tái)灣登勝JANUS,，中國(guó)臺(tái)灣油田YUTIEN,，中國(guó)臺(tái)灣臺(tái)肯TWOWAY，德國(guó)力士樂(lè)等
REXROTH液控單向閥產(chǎn)品部分型號(hào)：
R900459915,，SV10PA3-4X/
R900462117,，SV10GA1-4X/V/12
R900463364，SV10PA1-4X/V
R900464707,，SV10PB3-4X/
R900464954,，SV10GB2-4X/
R900465776，SV10GA1-4X/V
R900466324,，SV10PA3-4X/V
R900467724,，SV10PB1-4X/
R900469459，SV52PA3-1X/
R900470546,，SV62FA1-1X/V/12
R900477368,，SV10GA2-4X/V/12
R900481097，SV10GA1-4X//12
R900481120,，SV10GA2-4X/V
R900483368,，SV10GA1-4X/
R900483369，SV10PA1-4X/
R900500094,，SV20PA1-4X/V
R900500292,，SV20GA1-4X/V
R900500892，SV30PA1-4X/V
R900501333,，SV15GB1-4X/
R900501468,，SV20PB3-4X/
R900501701，SV20PB1-4X/
R900501802，SV20PB2-4X/
R900502112,，SV30PA2-4X/V
R900502240,，SV30PB1-4X/
R900502332，SV25GA1-4X//12
R900503632,，SV15GA1-4X//12
R900508425,，SV20GA1-4X//12
R900511197，SV20GA4-4X/
力士樂(lè)柱塞泵A10VSO71DR31R-PPA12N00
A10VSO71DR31R-PPA12K01
A10VSO71DFR131R-PPA12N00
A10VSO71DFR131R-PPA12N00
A10VSO71DFR131R-PPA12K02
A10VSO71DFR31R-PPA12N00
A10VSO71DFR31R-PPA12K27
A10VSO71DFLR31R-PPA12N00
A10VSO71DG31R-PPA12N00
A10VSO71DRG31R-PPA12N00
A10VSO71DFE131R-PPA12N00
A10VSO71FHD31R-PPA12N00
A10VSO71ED31R-PPA12N00
