日本SMC5通電磁閥和安全閥為一體，組成先導式壓力閥，該閥即是卸荷閥又是安全閥，有時又是溢流閥．卸荷時其控制油道貫穿各路換向閥，同前述卸荷油道．當各路換向閥處于中立位置時，卸荷閥的控制油道（見圖1b和圖2）貫穿各路換向閥并與油箱連通．卸荷時，大部分油液卸荷，通道短，壓力損失低．任一路閥換向工作，便切斷控制油道，油源來油就從換向閥進入執行元件工作，其工作壓力大小由導閥控制．此時系統壓力為導閥調整壓力．該種卸荷方式，即使換向閥路數增加，只是控制油道增加，卸荷壓力增加不大，始終保持較低卸荷壓力，此種卸荷方式多用于手動換向閥，卸荷可靠．
日(ri)本SMC5通電(dian)(dian)磁(ci)閥(fa)(fa)本身結構簡(jian)單(dan)，價格(ge)也(ye)低(di)(di)，比起調節(jie)閥(fa)(fa)等其它(ta)種類(lei)執行器易于安裝(zhuang)維護。更(geng)顯(xian)著的(de)是所組成(cheng)的(de)自(zi)控系統簡(jian)單(dan)得多(duo)，價格(ge)要低(di)(di)得多(duo)。由(you)于電(dian)(dian)磁(ci)閥(fa)(fa)是開(kai)關信號控制，與工控計算機(ji)連(lian)接十(shi)分方便。在當今電(dian)(dian)腦普(pu)及，價格(ge)大(da)幅(fu)下降的(de)時代，電(dian)(dian)磁(ci)閥(fa)(fa)的(de)優勢就(jiu)更(geng)加明顯(xian)。3）動作快(kuai)遞，功(gong)率微小(xiao)，外形輕巧(qiao)。電(dian)(dian)磁(ci)閥(fa)(fa)響應(ying)時間可(ke)以短至幾個毫秒(miao)(miao)，即(ji)使是先導式電(dian)(dian)磁(ci)閥(fa)(fa)也(ye)可(ke)以控制在幾十(shi)毫秒(miao)(miao)內。由(you)于自(zi)成(cheng)回(hui)路，比之其它(ta)自(zi)控閥(fa)(fa)反應(ying)更(geng)靈敏(min)。設計得當的(de)電(dian)(dian)磁(ci)閥(fa)(fa)線圈功(gong)率消耗(hao)很低(di)(di)，屬(shu)節(jie)能產品；還可(ke)做到只需觸(chu)發動作，自(zi)動保(bao)持閥(fa)(fa)位，平時一點(dian)也(ye)不耗(hao)電(dian)(dian)。電(dian)(dian)磁(ci)閥(fa)(fa)外形尺寸小(xiao)，既(ji)節(jie)省空間，又輕巧(qiao)美(mei)觀。

      VXP2140D-04-2G
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      VXP2140K-04-5DZ
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      VXP2140N-04-4G
      VXP2140N-04-5D
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      VXP2140Q-04-4TZ
      VXP2140S-03-4G
      VXP2140S-03-4T
      VXP2140S-03-9G（AC24V）
      VXP2140S-04-1D
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      VXP2140S-04-2DZ
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      VXP2140S-04-3D
      VXP2140S-04-3G
      VXP2140S-04-3T
      VXP2140S-04-4C
      VXP2140S-04-4D
      VXP2140S-04-4D1
      VXP2140S-04-4G
      VXP2140S-04-4G1
      VXP2140S-04-4G-B
      VXP2140S-04-4GS
      VXP2140S-04-4T
      VXP2140S-04-4TZ
      VXP2140S-04-4TZ-B
      VXP2140S-04-5D
      VXP2140S-04-5D1
      VXP2140S-04-5DZ
      VXP2140S-04-5G
      VXP2140S-04F-4G
      VXP2140S-04F-4T
      VXP2140S-04F-4TZ
      VXP2140T-04-4D
      VXP2142-03-4D
      VXP2142-03-5D
      VXP2142-03-5G
      VXP2142-03N-5G-B
      VXP2142-04-3DZ
      VXP2142-04-4D
      VXP2142-04-4DL
      VXP2142-04-4G
      VXP2142-04-4TL
      VXP2142-04-5D
      VXP2142-04-5DL
      VXP2142-04-5DZ
      VXP2142-04-5G