Keep valves clean
Keep the outside and moving parts of the valve clean to protect the integrity of the valve paint. Due to the trapezoidal threads on the valve surface, the stem and the stem nut, the sliding parts of the stem nut and the bracket, as well as gears, worm gears and other components, it is easy to deposit a lot of dirt such as dirt, oil and media residues, which will cause wear and corrosion to the valve.
Therefore, the valve should be cleaned frequently. The general dust on the valve should be brushed with compressed air and blown with compressed air. It can even be washed with a copper wire brush until the processed surface and the mating surface show metallic luster and the painted surface shows the true color of the paint. The steam trap should have a special person in charge. Check at least once in a shift; periodically open the flush valve and the bottom of the steam trap for flushing, or remove it regularly to prevent dirt from clogging the valve.
Regularly fill the valve parts
Keep the valve lubricated. The trapezoidal thread of the valve, the sliding position of the stem nut and the bracket, the engaging position of the bearing position, the gear and the worm gear stem, and other coordinated moving parts all need good lubrication conditions to reduce friction and avoid mutual wear. For the parts that do not have oil cups or oil nipples and are easily damaged or lost during operation, the lubrication system should be repaired and the oil circuit should be cleared.
Lubricate the parts regularly according to the specific situation. Frequently opened, high-temperature valves are suitable for refueling at intervals of one week to one month; infrequently opened, low-temperature valves may have longer refueling intervals. Lubricants organic oil, butter, molybdenum disulfide and graphite. The high temperature valve is suitable for adding molybdenum disulfide and wiping graphite powder. Exposed lubricating parts, such as trapezoidal threads and interdental parts, are easily contaminated with grease if grease such as butter is used, while molybdenum disulfide and graphite powder lubrication is less prone to contamination with dust and has a better lubrication effect than butter.
Keep parts intact
Keep both pieces complete and intact. Flange and bracket bolts should be complete and fully buckled, and no loosening is allowed. If the fastening nut on the hand wheel is loose, it should be tightened in time to avoid wearing the connection or losing the hand wheel. After the hand wheel is lost, it is not allowed to replace the hand wheel with a trap. The differential pressure of the packing must not be skewed or have no pre-tensioning gap. In the environment prone to pollution by rain, snow, dust, etc., the valve stem should be installed with a protective cover. The scale on the valve should be kept complete and accurate. Valve seals, caps, pneumatic accessories, etc. should be complete. The insulation jacket shall be free of dents and cracks.
In addition, it is not allowed to knock, support heavy objects or stand on the valve, so as not to stain the valve and damage the valve. Especially non-metal mesh doors and cast iron valves.
Routine maintenance electric device
Maintain daily maintenance of electric devices. The maintenance of electric devices is generally not less than once a month. Maintenance contents include: the appearance should be clean, no dust deposits, the device is not contaminated by soda, oil, and the sealing surface and points should be firm and tight. There is no leakage phenomenon; the lubricating part should be filled with oil according to regulations, and the valve nut should be filled with grease; the electrical part should be intact without phase failure, the automatic switch and thermal relay should not be tripped, and the indicator light is displayed correctly.