The surface of the valve, the trapezoidal thread on the valve rod and the valve rod nut, the sliding parts of the valve rod nut and the support, as well as the gears, worm gears and other components, are easy to accumulate a lot of dirt such as dust, oil and medium residues, which will cause wear and corrosion to the valve.

因此經常保持閥門外部和活動部位的清潔，保護閥門油漆的完整，顯然是十分重要的。閥門上的灰塵適用于毛刷拂掃和壓縮空氣吹掃；梯形螺紋和齒間的贓物適用于抹布擦洗；閥門上的油污和殘留適用于蒸汽吹掃，甚至用銅絲刷洗，直至加工面、配合面顯出金屬光澤，油漆面顯出油漆本色為止。疏水閥應有專人負責，每班至少檢查一次，定期打開沖洗閥和疏水閥底的堵頭進行沖洗，或定期拆卸沖洗，以免贓物堵塞閥門。

Therefore, it is obviously very important to keep the exterior and moving parts of the valve clean and protect the integrity of the valve paint. The dust on the valve is suitable for brush brushing and compressed air purging; Dirt between trapezoidal threads and teeth is suitable for wiping with rags; The oil stains and residues on the valve are suitable for steam purging, or even brushing with copper wire until the machined surface and mating surface show metallic luster, and the paint surface shows the natural color of paint. The drain valve shall be in the charge of a specially assigned person, and shall be inspected at least once per shift. The flushing valve and the plug at the bottom of the drain valve shall be opened regularly for flushing, or the valve shall be removed and flushed regularly to prevent dirt from blocking the valve.

潤滑劑有機油、黃油、二硫化鉬和石墨等。高溫閥門不適于用機油、黃油，它們會因高溫熔化而流失，而適于注入二硫化鉬和抹擦石墨粉劑。

Lubricants include engine oil, butter, molybdenum disulfide and graphite. High temperature valves are not suitable for oil and butter, which will be lost due to high temperature melting, but suitable for injecting molybdenum disulfide and wiping graphite powder.

對裸露在外的需要潤滑的部位，如梯形螺紋、齒輪等部位，若采用黃油等油脂，容易沾染灰塵，而采用二硫化鉬和石墨粉潤滑，則不容易沾染灰塵，潤滑效果比黃好。石墨粉不容易直接涂抹，可用少許機油或水調合成膏狀使用。注油密封的旋塞閥應按照規定時間注油，否則容易磨損和泄漏。

For exposed parts requiring lubrication, such as trapezoidal threads, gears, etc., if grease such as grease is used, it is easy to be contaminated with dust, while molybdenum disulfide and graphite powder are used for lubrication, it is not easy to be contaminated with dust, and the lubrication effect is better than that of yellow. Graphite powder is not easy to apply directly. It can be mixed with a little oil or water to form a paste. The plug valve for oil sealing shall be filled with oil at the specified time, otherwise it is easy to wear and leak.

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