寶德burkert0290 A 20 G3/4是一種直角回轉(zhuǎn)結(jié)構(gòu),它與閥門定位器配套使用,可實現(xiàn)比例調(diào)節(jié); V型閥芯zui適用于各種調(diào)節(jié)場合,具有額定流量系數(shù)大,可調(diào)比大,密封效果好,調(diào)節(jié)性能靈敏,體積小,可豎臥安裝。適用于控制氣體、蒸汽、液體等介質(zhì)。
是一種直角回轉(zhuǎn)結(jié)構(gòu),由V型閥體、氣動執(zhí)行機構(gòu)、定位器及其他附件組成;有一個近似等百比的固有流量特性;采用雙軸承結(jié)構(gòu),啟動扭矩小,具有*的靈敏度和感應速度;*的剪切能力。There are two types of pilot direct valves with servo diaphragm and mandatory lifting device, which is to shut or open when there is no flow. When the action mode A is closed, the core will close the pilot hole with the force of spring. Through a diaphragm throttling hole, a medium pressure is formed over the diaphragm to close the valve. When connected, the core opens the pilot perforation. The closing pressure above the diaphragm is removed and the valve is opened by medium pressure. To fully open the valve, the required differential pressure must not be lower than 0.5 bar
寶德burkert0290 A 20 G3/4操作方法
1.氣動閥操作時的啟閉方向,一律應順時針關(guān)閉。
2.由于管網(wǎng)中的氣動閥,經(jīng)常是人工啟閉,啟閉轉(zhuǎn)數(shù)不宜過多,就是大口徑閥門亦應在200-600轉(zhuǎn)內(nèi)。
3.為了便于一個人的啟閉操作,在管道工壓狀況下,zui大啟閉力矩宜為240N-m。
4.氣動閥啟閉操作端應為方榫,且尺寸標準化,并面向地面,以便人們從地面上可直接操作。帶輪盤的閥門不適用于地下管網(wǎng)。
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