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東莞艾科工業(yè)自動(dòng)化設(shè)備有限公司專(zhuān)業(yè)進(jìn)口美國(guó)FAIRCHILD減壓閥,調(diào)節(jié)器,控制閥,傳感器,等產(chǎn)品,我司在美國(guó),德國(guó)設(shè)有自己的公司,直接廠家訂貨,一手貨源,價(jià)格美麗,貨期短,質(zhì)量有保證,我司從06年成立以來(lái),擁有良好的市場(chǎng)信譽(yù),*的技術(shù)及服務(wù)團(tuán)隊(duì),歡迎您詢(xún)價(jià)采購(gòu)
美國(guó)廠價(jià)直銷(xiāo)FAIRCHILD減壓閥的出口壓力是用來(lái)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(dāng)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(kāi)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(guò)松或磨損過(guò)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(lái),即流經(jīng)阻尼孔的流量由先導(dǎo)流量和泄漏量?jī)刹糠謽?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(guò)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(dāng)減壓閥出口壓力調(diào)定后,如果出口流量為零時(shí),出口壓力會(huì)因主閥芯配合過(guò)松或磨損過(guò)大而升高。
美國(guó)廠價(jià)直銷(xiāo)FAIRCHILD減壓閥飛兆4000A型號(hào)是一款無(wú)泄漏高流量精密壓力調(diào)節(jié)器,專(zhuān)為要求高性能,低功耗和精確過(guò)程控制的應(yīng)用而設(shè)計(jì)。4000A型氣動(dòng)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(wú)論供應(yīng)壓力變化或條件如何,都能保持所需的設(shè)定點(diǎn)??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(dá)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(dāng)減壓閥的輸出壓力較高或通徑較大時(shí),用調(diào)壓彈簧直接調(diào)壓,則彈簧剛度必然過(guò)大,流量變化時(shí),輸出壓力波動(dòng)較大,閥的結(jié)構(gòu)尺寸也將增大。為了克服這些缺點(diǎn),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(dòng)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(dòng)式減壓閥供給的。若把小型直動(dòng)式減壓閥裝在閥體內(nèi)部,則稱(chēng)為內(nèi)部先導(dǎo)式減壓閥;若將小型直動(dòng)式減壓閥裝在主閥體外部,則稱(chēng)為外部先導(dǎo)式減壓閥
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