Lubricating parts should be refueled on a regular basis. Often open, the temperature of the valve is suitable for refueling once a week intervals; infrequently open, the valve temperature is not high fuel cycle can be longer. Lubricants organic oils, butter, molybdenum disulfide and graphite. High temperature valve is not suitable for use with oil, butter, they will be lost due to high temperature melting, and suitable for injection of molybdenum disulfide and wiping graphite powder. Lubricated parts exposed to the outside, such as trapezoidal thread, gear and other parts, if the use of grease such as butter, easy to contaminate dust, and the use of molybdenum disulfide and graphite powder lubrication, it is not easy to contaminate the dust, lubrication better than butter. Graphite powder is not easy to apply directly, can be used as a paste with a little oil or water. Oil seal plug valves should be filled in accordance with the provisions of time, otherwise easy to wear and tear. Valve maintenance operation of the valve, all kinds of valve should be complete, intact. Flange and bracket bolts indispensable, the thread should be intact, does not allow loose phenomenon. Tightening nuts on the handwheel should be tightened promptly if they are loose to avoid wearing the connection or losing the handwheel and nameplate. Handwheel if lost, not allowed to replace with a live wrench, should be timely and complete. Packing gland does not allow skew or no pre-clearance. On the vulnerable to rain, snow, dust, wind and other dirt contaminated valve environment, the valve stem to install the protective cover. The ruler on the valve should be kept intact, accurate and clear. Valve seals, caps, pneumatic accessories, etc. should be complete and intact. Insulation jacket should be no depression, cracks. Not allowed to beat in the operation of the valve, standing or supporting heavy objects; especially non-metallic valves and cast iron valves, but also to prohibit the maintenance of idle valves idle valve maintenance should be carried out with the equipment, pipes, should be as follows: a , Clean the valve valve cavity should be purged clean, no remnants and water solution, the valve should be wiped clean the outside, no dirt, oil 圬, with valve parts missing, can not be demolished, should Equipped with valves, for the next step to create good conditions to ensure that the valve is intact. Third, the anti-corrosion took out stuffing box packing, to prevent stem electrochemical corrosion, valve sealing surface, stem, stem nut, machined surface and other parts, depending on the circumstances coated with anti-rust agent, grease; paint Parts should be painted anti-rust paint. Fourth, the protection of protection against other objects to impact, artificial removal and demolition, if necessary, should be fixed valve activity parts, the valve packaging protection. Fifth, regular maintenance of idle valves for a long time, should be regularly inspected, regular maintenance, to prevent valve corrosion and damage. For the idle time is too long valve, should be equipment, devices, pipes together with the pressure test before use. Maintenance of electric devices Routine maintenance of electric devices, under normal circumstances, not less than once a month. Maintain the contents of: clean appearance, no dust stained plot; device from steam, water, oil contamination. Electric device sealed well, the sealing surface, the point should be complete and firm, tight, no leakage. Electric device should be well-lubricated, according to the provisions of the time on the valve stem nut should be added grease. Electrical parts should be intact, should not be damp and dust erosion; if damp, the need to use 500V megger to measure all the current-carrying parts and the insulation resistance between the shell, the value of not less than o.38 Mega-ohms, or the relevant components for drying deal with. Automatic switching and thermal relays should not be tripping, the indicator shows correct, no phase, short circuit, open circuit fault. The working status of the electric device is normal, open, close and flexible. Pneumatic device maintenance Pneumatic device routine maintenance work, under normal circumstances not less than once a month. The main contents of maintenance are: clean appearance, no dust accumulation; device should be free from water vapor, water, oil contamination. Pneumatic device seal should be good, the sealing surface, the point should be completely solid, tight and nondestructive. Manual operating mechanism should be well-lubricated, opening and closing flexible. Cylinder inlet and outlet gas joints are not allowed to damage; cylinder and air pipelines of all parts should be carefully inspected, shall not affect the performance of the leak. Pipe is not allowed to have depression, annunciator should be in good condition, annunciator should be intact, whether pneumatic annunciator or annunciator connection thread should be intact, there should be no leakage. Pneumatic valve on the device should be intact, no leakage, open flexible, smooth flow of air. The entire pneumatic device should be in normal working condition, open, off flexible. Valves management valves due to poor manufacturing quality, poor management, misuse and other causes of accidents are not uncommon. Some of the world's major malignant accidents, is caused by the valve failure. Therefore, to strengthen the management of valves is of great importance and imperative. Valve management includes the following. First, the technical information management It includes national standards and related standards, the valve drawings such as assembly drawings and consumable parts processing drawings, valve parts and processing technology and its specifications, the data sets and other accounts. Second, the valve repair management It includes repair and maintenance of the project, content, cycle, technical conditions, acceptance criteria and maintenance records, maintenance plans and completion reports. Third, the use of the file management It includes the valve specifications, manufacturers, working pressure, temperature, medium and flow direction, the use of life, the valve number and the name of the pipeline valve equipment code, overhaul records and valve replacement records. Fourth, the operation of the tour management It includes operating procedures; tour management system and the tour route, cycle; valve cleaning, refueling cycle and requirements, such as operating records. Fifth, the management of spare parts It includes valves, packing, gaskets, wearing parts, fasteners inventory maximum and minimum limits; spare parts, spare parts storage system, custody system, in particular, to adhere to spare parts, spare parts storage before The acceptance system. Six, valve quality management It includes the valve quality assurance system, total quality management, pressure test acceptance system, quality control points, personal responsibility and repair, pressure test, transfer records. VII, the management of the handover It includes the transfer system, on-site handover procedures, handovers diaries, etc. VIII, the management of the site signs It includes the valve on the operation site logo, signs, nameplate should be intact and correct; valve where the pipeline, Equipment name, number, media, flow direction, work pressure, temperature and other data display card should be eye-catching, to prevent misuse. Important valve should be locked control.
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