寶得（上海banshichu）德國(guó)BURKERT兩通比例閥  

BURKERT質(zhì)量流量控制器/比例閥

Massflow under control

Massflow gas measurement is independant of temperature and pressure, thus controlling a process gas can be stable and reproduceable. Massflow controllers contain a PID-controller and can be driven through norm signal or field bus. Massflow meters are without actuators and are only for measuring massflow.



Control valve strokes proportionall

Positioning valves can be combined with pneumatic, motorized, piezoelectric or solenoid actuators. The main differences between the various actuation principles are type of media separation, dynamic and force properties. Solenoid-operated positioning valves are known in practice as proportional valves and cover the nominal diameter range below 25 mm. Open and closed control loops can be developed using proportional valves. Open control loops control the valve without feedback signal, while closed control loops control the difference between the set-point and actual values. Switching solenoid valves, which are normally closed, form the basis for Bürkert proportional valves. Direct-acting proportional valves receive their feed below their seat, while servo-assisted models receive their feed above their seat.

寶得（上海banshichu）德國(guó)BURKERT兩通比例閥  BURKERT比例閥或流量/ 壓力復(fù)合控制伺服閥。并且伺服閥的控制參數(shù)，如流量增益、流量增益特性、零點(diǎn)等都可以根據(jù)控制性能*化原則進(jìn)行設(shè)置。伺服閥自身的診斷信息、關(guān)鍵控制參數(shù)（包括工作環(huán)境參數(shù)和伺服閥內(nèi)部參數(shù)）可以及時(shí)反饋給主控制器；可以遠(yuǎn)距離對(duì)伺服閥進(jìn)行監(jiān)控、診斷和遙控。在主機(jī)調(diào)試期間控制工程網(wǎng)版權(quán)所有，可以通過(guò)總線端口下載或直接由上位機(jī)設(shè)置伺服閥的控制參數(shù)，使伺服閥與控制系統(tǒng)達(dá)到*匹配，優(yōu)化控制性能。而伺服閥控制參數(shù)的下載和更新，甚至在主機(jī)運(yùn)轉(zhuǎn)時(shí)也能進(jìn)行。而在伺服閥與控制系統(tǒng)相匹配的技術(shù)應(yīng)用發(fā)展中，嵌入式技術(shù)對(duì)于伺服閥已經(jīng)成為現(xiàn)實(shí)。按照嵌入式系統(tǒng)應(yīng)定義為：“嵌入到對(duì)像體系中的計(jì)算機(jī)系統(tǒng)”。“嵌入性”、“性”與“計(jì)算機(jī)系統(tǒng)”是嵌入式系統(tǒng)的三個(gè)基本要素。它是在傳統(tǒng)的伺服閥中嵌入的微處理芯片和相應(yīng)的控制系統(tǒng)，針對(duì)客戶的具體應(yīng)用要求而構(gòu)建成具有*控制參數(shù)的伺服閥并由閥自身的控制系統(tǒng)完成相應(yīng)的控制任務(wù)（如各控制軸同步控制），再嵌入到整個(gè)的大控制系統(tǒng)中去。
寶得（上海banshichu）德國(guó)BURKERT兩通比例閥
6021 直動(dòng)式兩位兩通比例電磁閥，內(nèi)孔0.8 - 1.6 mm
6022 直動(dòng)式兩位兩通比例電磁閥，內(nèi)孔0.8 - 4.0 mm
6023 直動(dòng)式兩位兩通比例電磁閥，內(nèi)孔4.0 or 6.0 mm
6223 伺服輔助式兩位兩通大流量比例電磁閥，內(nèi)孔10.0 - 20.0 mm
BURKERT常用比例閥結(jié)構(gòu)簡(jiǎn)單、體積小、重量輕，只由少數(shù)幾個(gè)零件組成。而且只需旋轉(zhuǎn)90°即可快速啟閉，操作簡(jiǎn)單，同時(shí)該閥門具有良好的流體控制特性。蝶閥處于*開(kāi)啟位置時(shí)，蝶板厚度是介質(zhì)流經(jīng)閥體時(shí)*的阻力，因此通過(guò)該閥門所產(chǎn)生的壓力降很小，故具有較好的流量控制特性。蝶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。采用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*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陷。 如果要求蝶閥作為流量控制使用，主要的是正確選擇閥門的尺寸和類型。蝶閥的結(jié)構(gòu)原理尤其適合制作大口徑閥門。蝶閥不僅在石油、煤氣、化工、水處理等一般工業(yè)上得到廣泛應(yīng)用，而且還應(yīng)用于熱電站的冷卻水系統(tǒng)。常用的蝶閥有對(duì)夾式蝶閥和法蘭式蝶閥兩種。