using process maintenance and maintenance of the Industrial Valves in use process should pay attention to maintenance and maintenance, good maintenance and maintenance to ensure the reliable operation on one hand, on the other hand also can effectively extend the service life of the valve. ( 1) Driving part clean and lubricated stem threads as an important part of the valve opening and closing driving part, its surface cleanliness and lubrication degree directly influences the normal operation of the valve. To check the cleanliness of the stem thread surface, regular use butter, molybdenum disulfide or graphite powder was carried out on the rod thread lubrication, to ensure the reliability of the transmission performance. Even if it is not often open/close the valve, also want to turn the handwheel, regularly add lubricant to the valve stem threads, thread killed in case. Such as valve adopts mechanical transmission, regularly check the status of a bearing box and transmission oil, add or replace lubricating oil in time, ensure such as bearings, gears transmission parts in good lubrication condition. Always keep the valve is clean. Especially in the area of the valve installed in the external environment is poor, and to be on the valve stem and cases, in case of rain, snow, dust and other corrosion caused the valve opening and closing the valve stem jamming. ( 2) Integrity should regularly check and maintain the valve parts especially the valve installed in the outdoor, should take the necessary protective measures to avoid long-term exposure in the rough conditions that lead to valve rust, serious may disable confined boundary, eventually lead to serious consequences. ( 3) Check valve action flexibility at present, most of the valves are with switch indication marks, to operate the valve should be see switch direction, at the same time starting position not overexert, threaded portion of the stem can apply some piping allows the lubricating oil for lubrication and maintenance. ( 4) Regularly check for leaks stuffing box parts such as found that slight leakage, can be through the pressure plate, pressure again to solve the pressing sleeve, but linking piece of thread should be symmetrical teaspoons of compaction, compaction process to prevent pressure set of skew jammed valve stem. At the end of the compression process, should check the valve stem operation performance. The operation of the valve to the valve, not only should be installed and regular maintenance, maintenance, and operation. In general, the valve opening and closing follow & other; Inverse shun close & throughout; Principle, namely the handwheel counterclockwise to open valve, rotating the handwheel clockwise to close the valve. ( 1) Either electric or pneumatic valves, valve generally consider when valve design manual function, manual valve function - Usually by the handwheel or handle. The valve handwheel or handle, is designed according to the ordinary human, considering the strength of the sealing surface and the necessary closing force. Therefore cannot be used in the process of actual valve opening and closing operation lever or long wrench to throw. Some people used to use & other; F” Spanner, attention should be strictly, do not force too big too hard, otherwise easy to damage the sealing surface, or pull off the handwheel, handle, in part through bevel gear or worm gear and worm drive, the adopts lengthened lever or & other; F” Greatly too forcibly spanner to operate the handwheel, too hard may lead to a bevel gear or worm gear and worm deformation or damage. ( 2) Open/close the valve, should be smooth, hard hit. Some with impact handwheel open/close the high-pressure Industrial Valves parts in the design and manufacture has considered the impact, with general valve can't equate. When the valve is fully open, the hand wheel should be overturned a little, between the screw thread, so as to avoid looseness damage. For rising stem valves, to remember the full open and full closed when the valve stem position, in order to check whether the state of full open full close valve is normal, if the disc off, or between valve core and valve seat sealing surface embedded large sundry, full open full close the valve stem position will change, which can be very easy to find fault in order to take further measures in a timely manner. ( 3) At the beginning of the line, more stuff, can raise, the valve using high speed flow of medium, it washed away, then gently close ( Cannot be quickly closed, slammed shut to prevent residual impurities task of sealing surface) , once again open, so repeated many times, clean dirt, to work properly. Normally open valve, sealing surface may stick with dirt, closed and want to use the method to be washed clean, and then formally locked. Such as the handwheel, handle the damage or loss, shall be immediately to match neat, do not replace with adjustable spanner, in order to avoid damage to the valve stem, opening and closing is ineffective, so that accidents in production. Cooling after some medium, close the valve, the valve a contraction, the operator shall be given to the appropriate time to close again, ( 4) Let the sealing surface crack, leaving no otherwise, medium fine seam high-speed flow, it is easy to erosion seal face. ( 5) operation, such as found too difficult operation, causes should be analyzed, the operation cannot be forced. If the packing is too tight, can relax appropriately; If stem skew, should notify the maintenance personnel to repair. High temperature gate valve in the closed state, closed heat expansion, open is difficult, if must open at this time, but will cover on the bearing gland unscrewing to half a circle a circle, eliminate stress, the Industrial Valves stem and then turn the handwheel.
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