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德國(guó)費(fèi)斯托FESTO調(diào)壓閥中國(guó)代理商*

     FESTO比例調(diào)節(jié)閥功效和封閉密封特性,，在大中口徑、中低壓力的應(yīng)用范疇,，電動(dòng)球閥是主導(dǎo)的閥門情勢(shì)。電動(dòng)球閥處于完整開啟地位時(shí),，蝶板厚度是介質(zhì)流經(jīng)閥體時(shí)*的阻力,，因此通過該閥門所發(fā)生的壓力降很小，故具有較好的流量把持特征。電動(dòng)球閥有彈密封和金屬的密封兩種密封型式,。彈性密封閥門,，密封圈可以鑲嵌在閥體上或附在蝶板周邊。 采取金屬密封的閥門一般比彈性密封的閥門壽命長(zhǎng),，但很難做到完整密封,。金屬密封能適應(yīng)較高的 工作溫度，彈性密封則具有受溫度限制的缺 點(diǎn),。 假如請(qǐng)求電動(dòng)球閥作為流量把持使用,，重要的是準(zhǔn)確選擇閥門的尺寸和類型。電動(dòng)球閥的構(gòu)造原理尤其合適制造大口徑閥門,。電動(dòng)球閥不僅在石油,、煤氣、化工,、水處置等一般產(chǎn)業(yè)上得到普遍運(yùn)用,，而且還利用于熱電站的冷卻水體系。
    FESTO比例調(diào)節(jié)閥自力式壓力控制閥）無需外加能源,，利用被調(diào)介質(zhì)自身能量為動(dòng)力源,，引入執(zhí)行機(jī)構(gòu)控制閥芯位置，改彎兩端的壓差和流量,，使閥前（或閥后）壓力穩(wěn)定,。具有動(dòng)作靈敏，密封性好,，壓力設(shè)定點(diǎn)波動(dòng)力小等優(yōu)點(diǎn),，自力式壓力控制閥廣泛應(yīng)用于氣體、液體及蒸汽介質(zhì)減壓穩(wěn)壓或泄壓穩(wěn)壓的自動(dòng)控制,。

德國(guó)費(fèi)斯托FESTO調(diào)壓閥中國(guó)代理商*

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