01. Keep the valve clean and intact

Keep the exterior and moving parts of the valve clean and protect the integrity of the valve paint. The surface of the valve, trapezoidal threads on the valve stem and stem nut, sliding parts between the valve stem nut and the bracket, as well as gears, worm gears, and other components are prone to accumulate a lot of dust, oil, and medium residue, which can cause wear and corrosion to the valve. Therefore, the valve should be kept clean regularly.

Generally, dust on valves can be brushed with a brush or blown with compressed air, and even washed with a copper wire brush until the processing surface and mating surface show a metallic luster, and the paint surface shows its natural color. The steam trap should be under the responsibility of a dedicated person and inspected at least once per shift; Regularly open the flushing valve and steam trap bottom plug for flushing, or disassemble them regularly for flushing to prevent dirt from blocking the valve.

02. Keep the valve well lubricated

Good lubrication conditions are required to maintain the lubrication of the valve, the trapezoidal thread of the valve, the sliding parts of the valve stem nut and bracket, the bearing position, the meshing parts of the gear and worm gear, and other cooperating moving parts, in order to reduce friction and avoid mutual wear. For parts without oil cups or nozzles that are prone to damage or loss during operation, the lubrication system should be repaired and equipped, and the clearance of the oil circuit should be verified.

Lubricating parts should be regularly oiled according to specific conditions. Valves that are frequently opened and have high temperatures are suitable for refueling every week to a month; Valves that are not frequently opened and have low temperatures can have longer refueling cycles.

Lubricants include engine oil, butter, molybdenum disulfide, and graphite. Engine oil is not suitable for high-temperature valves; Butter is also not very suitable as it will melt at high temperatures and be lost. High temperature valves are suitable for adding molybdenum disulfide and graphite powder for wiping. The exposed lubrication parts, such as trapezoidal threads, interdental areas, etc., are prone to dust if grease such as butter is used. However, using molybdenum disulfide and graphite powder for lubrication is less prone to dust and has a better lubrication effect than butter. Graphite powder is not easy to apply directly and can be mixed with a small amount of engine oil or water to form a paste for use.

The oil sealed plug valve should be filled with oil according to the specified time, otherwise it is prone to wear and leakage.

03. Keep both items complete and in good condition

Keep both items complete and in good condition. The bolts of flanges and brackets should be complete and fully fastened, and no looseness is allowed. If the fastening nut on the handwheel is loose, it should be tightened in a timely manner to avoid wear on the connection or loss of the handwheel. After the handwheel is lost, it is not allowed to replace it with a movable board, and it should be promptly equipped.

The filling pressure difference is not allowed to be skewed or have no pre tightening gap. In environments prone to pollution from rain, snow, dust, and other pollutants, the valve stem should be equipped with a protective cover. The scale on the valve should be kept complete and accurate. The lead seal, cap, pneumatic accessories, etc. of the valve should be complete and intact. The insulation jacket should be free of dents and cracks.

In addition, it is not allowed to knock, support heavy objects or stand on the valve to avoid dirtying and damaging the valve. Especially non-metallic mesh doors and cast iron valves should be avoided.