如果手動蝶閥無法打開或空轉，可能是以下幾個原因：

　　If the manual butterfly valve cannot be opened or runs idle, there may be several reasons:

　　一、閥桿受到堵塞或損壞：

　　1、 The valve stem is blocked or damaged:

　　檢查閥桿是否正常工作，如果發現閥桿無法轉動或移動，則可能是因為其受到堵塞或損壞。使用潤滑劑嘗試移動閥桿，如果不行，需要更換閥桿或尋找其他方法解決問題。

　　Check if the valve stem is working properly. If it is found that the valve stem cannot rotate or move, it may be due to blockage or damage. Try moving the valve stem with lubricant. If it doesn't work, replace the valve stem or find other ways to solve the problem.

　　二、手柄松動或損壞：

　　2、 Loose or damaged handle:

　　檢查手柄是否正確安裝，如果手柄松動或損壞，可能會導致閥門無法打開。嘗試重新安裝手柄或更換損壞的手柄以解決問題。

　　Check if the handle is installed correctly. If the handle is loose or damaged, it may cause the valve to fail to open. Try reinstalling the handle or replacing the damaged handle to solve the problem.

　　三、蝶板銷釘損壞：

　　3、 Butterfly plate pin damage:

　　檢查蝶板銷釘是否正確安裝，如果蝶板銷釘損壞或松動，則會導致閥門無法打開。嘗試重新安裝或更換損壞的蝶板銷釘來解決問題。

　　Check if the butterfly plate pin is installed correctly. If the butterfly plate pin is damaged or loose, it will cause the valve to fail to open. Try reinstalling or replacing the damaged butterfly plate pin to solve the problem.

　　如果以上方法都不能解決問題，可能需要請專業人士檢查并維修閥門。注意在維修閥門時，必須遵循安全規范，避免發生事故。本文由 上海良工閥濟南銷售處   友情奉獻.更多有關的知識請點擊  http://m.wjyfs.com/   真誠的態度.為您提供為全面的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

　　If none of the above methods can solve the problem, it may be necessary to have a professional inspect and repair the valve. Attention must be paid to following safety regulations when repairing valves to avoid accidents. This article is a friendly contribution from the Jinan sales office of Shanghai Lianggong Valve For more related knowledge, please click http://m.wjyfs.com/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.