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DBW10B-2-5X/315G24N9K4 間接作用式調(diào)節(jié)閥，增加了一個(gè)指揮器（先導(dǎo)閥）它起到對(duì)反饋信號(hào)的放大作用然后通過(guò)執(zhí)行機(jī)構(gòu)，驅(qū)動(dòng)主閥閥瓣運(yùn)動(dòng)達(dá)到改變閥開(kāi)度的目的。

如果是壓力調(diào)節(jié)閥，反饋信號(hào)就是閥的出口壓力，通過(guò)信號(hào)管引入執(zhí)行機(jī)構(gòu)。

如果是流量調(diào)節(jié)閥，閥的出口處就有一個(gè)孔板（或者是其他阻力裝置）由孔板兩端取出壓差信號(hào)引入執(zhí)行機(jī)構(gòu)。

如果是溫度調(diào)節(jié)閥，閥的出口就有溫度傳感器（或者溫包）通過(guò)溫度傳感器內(nèi)介質(zhì)的熱脹冷縮驅(qū)動(dòng)執(zhí)行機(jī)構(gòu)。

自力式調(diào)節(jié)閥依靠流經(jīng)閥內(nèi)介質(zhì)自身的數(shù)字壓力表、攝氏度作為能源驅(qū)動(dòng)閥門(mén)自動(dòng)工作，不需要外接電源和二次儀表。這種自力式調(diào)節(jié)閥都利用閥輸出端的反饋信號(hào)源（數(shù)字壓力表、壓差、攝氏度）通過(guò)信號(hào)源管傳遞到運(yùn)行組織驅(qū)動(dòng)閥瓣改變閥門(mén)的開(kāi)度，達(dá)到調(diào)節(jié)數(shù)字壓力表、流量、攝氏度的目的。這種調(diào)節(jié)閥又分為直接功用式和間接功用式兩種。

直接功用自力式調(diào)節(jié)閥又稱(chēng)為彈簧負(fù)載式，其結(jié)構(gòu)內(nèi)有彈性元件如：彈簧、波紋管、波紋管式的溫包等，利用彈性力與反饋信號(hào)源平衡的原理。 如果是數(shù)字壓力表自力式調(diào)節(jié)閥，反饋信號(hào)源就是閥的出口數(shù)字壓力表，通過(guò)信號(hào)源管引入運(yùn)行組織。 如果是流量自力式調(diào)節(jié)閥，閥的出口處就有一個(gè)孔板（或者是其他阻力裝置）由孔板兩端取出壓差信號(hào)源引入運(yùn)行組織。 如果是攝氏度自力式調(diào)節(jié)閥，閥的出口就有攝氏度傳感器（或者溫包）通過(guò)攝氏度傳感器內(nèi)介質(zhì)的熱脹冷縮驅(qū)動(dòng)運(yùn)行組織。(1) 取壓點(diǎn) A10VSO18DFR1/31R-PPA12N00

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