How to maintain the valve during operation?

The maintenance principles during valve operation are as follows:

①Keep the exterior and movable parts of the valve clean, and protect the integrity of the valve paint. The surface of the valve, the trapezoidal thread on the valve stem and the valve stem nut, the sliding part of the stem nut and the bracket, and the gears, worm gears and worms are prone to deposit a lot of dust, oil and medium residues, which will cause wear and corrosion to the valve. Therefore, always keep the valve clean. The general dust on the valve can be swept with brush and compressed air, and even can be brushed with copper wire, until the processing surface and mating surface show metallic luster, and the painted surface shows the natural color of paint. The steam trap should be inspected by a dedicated person at least once per shift; the flush valve and the bottom wire of the steam trap should be opened regularly for flushing, or should be disassembled and flushed regularly to prevent dirt from blocking the valve.

②Keep the lubrication of the valve, valve trapezoidal thread, sliding parts of valve stem nut and bracket, bearing position, meshing parts of gears and worm gears, and other cooperating moving parts all need good lubrication conditions to reduce mutual friction and avoid mutual wear . For parts that do not have an oil cup or nozzle and are easily damaged or lost during operation, the lubrication system should be repaired and the lubrication system should be verified.

Lubrication parts should be regularly oiled according to specific conditions. Frequently opened valves with high temperature are suitable for refueling once a week to a month; valves with infrequent openings and low temperature may have a longer refueling cycle. Lubricants: organic oil, butter, molybdenum disulfide, graphite, etc. Engine oil is not suitable for high temperature valves; butter is also not suitable, they will be lost due to high temperature melting. The high temperature valve is suitable for adding molybdenum disulfide and wiping graphite powder. Lubricating parts exposed to the outside, such as trapezoidal threads, teeth, etc., are easily contaminated with grease if grease such as butter is used, while molybdenum disulfide and graphite powder lubrication are not easy to contaminate dust and the lubrication effect is better than butter. Graphite powder is not easy Apply directly, and use a little oil or water to make a paste.

The oil-filled plug valve should be filled with oil at the specified time, otherwise it is easy to wear and leak.

③Keep the two pieces complete and in good condition. The bolts of the flange and the bracket should be complete, fully buckled, and no looseness is allowed. If the fastening nut on the handwheel is loose, it should be tightened in time to avoid abrasion of the connection or loss of the handwheel. After the handwheel is lost, it is not allowed to replace the handwheel with a trap, and it should be provided in time. The packing pressure difference is not allowed to be skewed or without pre-tightening clearance. In environments prone to contamination by rain, snow, dust, etc., a protective cover should be installed on the valve stem. The ruler on the valve should be complete and accurate. The lead seals, caps, and pneumatic accessories 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 soiling or damaging the valve. Especially non-metallic mesh doors and cast iron valves should be avoided.

See The Sample:Electric ball valve

Maintain daily maintenance of electric devices. The maintenance of electric devices is generally not less than once a month. The maintenance content includes: the appearance should be clean, no dust accumulation, the device is not contaminated by soda and oil; the sealing surface and points should be firm and tight. There is no leakage; the lubrication parts should be oiled according to the regulations, and the valve socket nuts should be greased; the electrical parts should be intact, no phase failures, automatic switches and thermal relays should not trip, and the indicator lights should display correctly.

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