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電動機功率	11kW	外形尺寸	14mm
應用領域	化工,農業(yè),能源,建材,電子	重量	14kg

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。

注意事項。

(1)必須保證液控單向閥有足夠的控制壓力，絕對不允許控制壓力失壓。應注意控制壓力是否滿足反向開啟的要求。如果液控單向閥的控制引自主系統(tǒng)時，則要分析主系統(tǒng)壓力的變化對控制油路壓力的影響，以免出現(xiàn)液控單向閥的誤動作。

(2)根據(jù)液控單向閥在液壓系統(tǒng)中的位置或反向出油腔后的液流阻力（背壓）大小，合理選擇液控單向閥的結構（簡式或復式）及泄油方式（內泄或外泄）。對于內泄式液控單向閥來說，當反向油出口壓力超過一定值時，液控部分將失去控制作用，故內泄式液控單向閥一般用于反向出油腔無背壓或背壓較小的場合；而外泄式液控單向閥可用于反向出油腔背壓較高的場合，以降低最小的控制壓力，節(jié)省控制功率。系統(tǒng)若采用內卸式，則柱塞缸將斷續(xù)下降發(fā)出振動和噪聲。

節(jié)流口堵塞原因：

1、油液中的機械雜質或因氧化析出的膠質、瀝青、碳渣等污物堆積在節(jié)流縫隙處。

2、由于油液老化或受到擠壓后產生帶電的極化分子，而節(jié)流縫隙的金屬表面上存在電位差，故極化分子被吸附到縫隙表面，形成牢固的邊界吸附層，吸附層厚度一般為5~8微米，因而影響了節(jié)流縫隙的大小。以上堆積、吸附物增長到一定厚度時，會被液流沖刷掉，隨后又重新附在閥口上。這樣周而復始，就形成了流量的脈動。

3、閥口壓差較大時，因閥口溫度高，液體受擠壓的程度增強，金屬表面也更易受摩擦作用而形成電位差，因此壓差大時容易產生堵塞現(xiàn)象。

減輕節(jié)流口堵塞的措施：

1、選擇水力半徑大的薄刃節(jié)流口。

2、精密過濾并定期更換油液。

3、適當減小節(jié)流口前后的壓差。

4、采用電位差較小的金屬材料、選用抗氧化穩(wěn)定性好的油液、減小節(jié)流口表面粗糙度。

型號提供：

REXROTH R900348007 S10/A0.0/12

力士樂管式單向閥S10A1. R900420531

REXROTH R900420531 S10A1.0/
REXROTH R900497659 S10A1.0/12

力士樂管式單向閥S10A1. R900420531

REXROTH R900490600 S15A0.0/12
REXROTH R900420537 S15A1.0/
REXROTH R900455137 S15A1.0/12
REXROTH R900486216 S15A5.0/12
REXROTH R900343034 S20A0.0/12

REXROTH R900470782 S20A1.0/12

REXROTH R900353560 S20A2.0/12
REXROTH R900470822 S20A3.0/12
REXROTH R900347261 S20A5.0/12
REXROTH R900344017 S25A0.0/12
REXROTH R900420511 S25A1.0/
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REXROTH R900354272 S25A5.0/12
REXROTH R900415457 S30A0.0/12
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REXROTH R900342882 S30A2.0/12
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REXROTH R900488016 S8A1.0/12
REXROTH R900348007 S10A0.0//12
REXROTH R900420531 S10A1.0/
REXROTH R900497659 S10A1.0//12
REXROTH R900424731 S10A1.0//5
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REXROTH R900490600 S15A0.0//12
REXROTH R900420537 S15A1.0/
REXROTH R900455137 S15A1.0//12
REXROTH R900427399 S15A1.0//5
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REXROTH R900486216 S15A5.0//12
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REXROTH R900344017 S25A0.0//12
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REXROTH R900455138 S25A1.0//12
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REXROTH R900420503 S30A2.0//5
REXROTH R900470823 S30A3.0//12
REXROTH R900347681 S30A5.0//12
REXROTH R900422882 S6A1.0//5
REXROTH R900488016 S8A1.0//12
REXROTH R900348007 S10A0.0//12
REXROTH R900420531 S10A1.0/
REXROTH R900497659 S10A1.0//12
REXROTH R900356466 S10A2.0//12
REXROTH R900497660 S10A3.0//12
REXROTH R900470821 S10A5.0//12
REXROTH R900490600 S15A0.0//12
REXROTH R900420537 S15A1.0/
REXROTH R900455137 S15A1.0//12
REXROTH R900343481 S15A2.0//12
REXROTH R900490601 S15A3.0//12
REXROTH R900486216 S15A5.0//12
REXROTH R900343034 S20A0.0//12
REXROTH R900470782 S20A1.0//12
REXROTH R900353560 S20A2.0//12
REXROTH R900470822 S20A3.0//12
REXROTH R900347261 S20A5.0//12
REXROTH R900344017 S25A0.0//12
REXROTH R900420511 S25A1.0/
REXROTH R900455138 S25A1.0//12
REXROTH R900347547 S25A2.0//12
REXROTH R900340147 S25A3.0//12
REXROTH R900354272 S25A5.0//12
REXROTH R900415457 S30A0.0//12
REXROTH R900420519 S30A1.0/
REXROTH R900492887 S30A1.0//12
REXROTH R900342882 S30A2.0//12
REXROTH R900470823 S30A3.0//12
REXROTH R900347681 S30A5.0//12
REXROTH R900488016 S8A1.0//12

力士樂單向閥R900459203 Z2FS16-8-3X/S

力士樂單向閥R900457256 Z2FS16-8-3X/S2

力士樂單向閥R901413310 Z2FS16-8-3X/S2J3

力士樂單向閥R901413311 Z2FS16-8-3X/S2J3V

力士樂單向閥R900473688 Z2FS16-8-3X/S2V

力士樂單向閥R901413313 Z2FS16-8-3X/SJ3

力士樂單向閥R901413315 Z2FS16-8-3X/SJ3V

力士樂單向閥R900470529 Z2FS16-8-3X/SV

力士樂單向閥R900073409 Z2FS16-8-3X/SV=LB

力士樂單向閥R900426851 Z2FS16A8-3X/S

力士樂單向閥R900348227 Z2FS16A8-3X/S2

力士樂單向閥R900591255 Z2FS16A8-3X/S2V

力士樂單向閥R900498950 Z2FS16B8-3X/S

力士樂單向閥R900481621 Z2FS6-2-4X/1Q

力士樂單向閥R900481623 Z2FS6-2-4X/1QV

力士樂單向閥R900481622 Z2FS6-2-4X/2Q

力士樂單向閥R901435983 Z2FS6-2-4X/2QJ3V/60

力士樂單向閥R900481624 Z2FS6-2-4X/2QV

力士樂單向閥R900727967 Z2FS6-2-4X/2QV/60

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