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D381X-16Q溝槽渦輪信號蝶閥

若彈性座封閘閥埋設較深，操作機構及顯示盤(pán)離地面距離≥1.5m時(shí)，應設有加長(cháng)桿設施，且固定穩牢，以便人們從地面上觀(guān)察及操作。也就是說(shuō)，管網(wǎng)中的閥門(mén)啟閉操作，不宜下井作業(yè)。

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D381X-16Q溝槽渦輪信號蝶閥

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3.1彈性座封閘閥操作時(shí)的啟閉方向，一律應順時(shí)針關(guān)閉。
3.2由于管網(wǎng)中的氣動(dòng)閥，經(jīng)常是人工啟閉，啟閉轉數不宜過(guò)多，就是大口徑閥門(mén)亦應在200－600轉內。
3.3為了便于一個(gè)人的啟閉操作，在管道工壓狀況下，最大啟閉力矩宜為240N-m。
3.4暗桿閘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(pán)的閥門(mén)不適用于地下管網(wǎng)。
3.5暗桿閘閥啟閉程度的顯示盤(pán)
①暗桿閘閥啟閉程度的刻度線(xiàn)，應鑄造在變速箱蓋上或轉換方向后的顯示盤(pán)的外殼上，一律面向地面，刻度線(xiàn)刷上熒光粉，以示醒目；
②指示盤(pán)針的材質(zhì)在管理較好的情況下可用不銹鋼板，否則為刷漆的鋼板，切勿使用鋁皮制作；
③指示盤(pán)針醒目，固定牢靠，一旦啟閉調節準確后，應以鉚釘鎖定。
3.6若彈性座封閘閥埋設較深，操作機構及顯示盤(pán)離地面距離≥1.5m時(shí)，應設有加長(cháng)桿設施，且固定穩牢，以便人們從地面上觀(guān)察及操作。也就是說(shuō)，管網(wǎng)中的閥門(mén)啟閉操作，不宜下井作業(yè)。

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