How to carry out equipment maintenance after the plant stops operating

1) The pump comes with a manufacturer’s maintenance manual, or you can consult the manufacturer’s after-sales service department directly； 2) For regular valves, generally check the appearance for any damage or defects ； Apply sealant where it is necessary inside ； If discharge is required, open the plug to carry out discharge ； Check whether the handwheel or actuator is operating properly, whether the switches are in the correct position, and whether the mechanical indications match the actual condition ； Check for any air leaks and replace the packing ； Disassemble and replace components in those that are severely corroded or internally eroded ； For special valves, it is necessary to consult the manufacturer to take into account any special requirements regarding replacement and maintenance ； 3) Container: Check appearance and side wall thickness ； Whether the internal components are deformed or contaminated, and whether they need to be replaced or cleaned ； Do the instruments installed on the container need to be tested, and do the safety devices require re-calibration? ； Hope this helps a bit! !