東莞艾科工業(yè)自動化設(shè)備有限公司專業(yè)進口美國FAIRCHILD減壓閥，調(diào)節(jié)器，控制閥，傳感器，等產(chǎn)品，我司在美國，德國設(shè)有自己的公司，直接廠家訂貨，一手貨源，價格美麗，貨期短，質(zhì)量有保證，我司從06年成立以來，擁有良好的市場信譽，*的技術(shù)及服務(wù)團隊，歡迎您詢價采購
美國廠價直銷FAIRCHILD減壓閥的出口壓力是用來控制電液換向閥或外控順序閥等的控制油液壓力大小的，當電液換向閥或外控順序閥換向或工作后，減壓閥出油口流量變?yōu)榱?，但壓力還需保持原先調(diào)定的壓力。這種情況下，因閥出口流量為零，流經(jīng)減壓口的流量只有先導(dǎo)流量。由于先導(dǎo)流量很少，一般在2L/min之內(nèi)，因此主閥減壓口基本上接近全關(guān)位置（開度極?。?，先導(dǎo)流量由三角槽或斜錐面處流出，如果主閥芯配合過松或磨損過大，則泄漏量增加。按流量連續(xù)性定理，這部分泄漏量也必須從主閥芯阻尼孔流來，即流經(jīng)阻尼孔的流量由先導(dǎo)流量和泄漏量兩部分構(gòu)成，而阻尼孔面積和主閥彈簧腔油液壓力未變（彈簧腔油液壓力由已調(diào)好的調(diào)壓彈簧預(yù)壓縮量確定），為使通過阻尼孔的流量增加，必然引起主閥下腔油液壓力的升高。因此，當減壓閥出口壓力調(diào)定后，如果出口流量為零時，出口壓力會因主閥芯配合過松或磨損過大而升高。
美國廠價直銷FAIRCHILD減壓閥飛兆4000A型號是一款無泄漏高流量精密壓力調(diào)節(jié)器，專為要求高性能，低功耗和精確過程控制的應(yīng)用而設(shè)計。4000A型氣動調(diào)節(jié)器具有小于0.5“水柱的控制靈敏度，zui小消耗量和高流量能力，可提供始終如一且可靠的精度精度，從而無論供應(yīng)壓力變化或條件如何，都能保持所需的設(shè)定點?？商幚?50 psi，17 BAR的zui大供應(yīng)壓力，并提供0.5-10 psi，0.03-0.7 BAR，3-70 kPa至5-250 psi，0.35-17 BAR，35-1700 kPa的五（5） 。4000A型的流量可達150 SCFM，255 m3 / hr。
按結(jié)構(gòu)形式可分為薄膜式、彈簧薄膜式、活塞式、杠桿式和波紋管式；按閥座數(shù)目可人為單座式和雙座式；按閥瓣的位置不同可分為正作用式和反作用式。先導(dǎo)式減壓閥當減壓閥的輸出壓力較高或通徑較大時，用調(diào)壓彈簧直接調(diào)壓，則彈簧剛度必然過大，流量變化時，輸出壓力波動較大，閥的結(jié)構(gòu)尺寸也將增大。為了克服這些缺點，可采用先導(dǎo)式減壓閥。先導(dǎo)式減壓閥的工作原理與直動式的基本相同。先導(dǎo)式減壓閥所用的調(diào)壓氣體，是由小型的直動式減壓閥供給的。若把小型直動式減壓閥裝在閥體內(nèi)部，則稱為內(nèi)部先導(dǎo)式減壓閥；若將小型直動式減壓閥裝在主閥體外部，則稱為外部先導(dǎo)式減壓閥
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