How to maintain the valve for a long time

Valves can be used to control the flow of various types of fluids such as air, water, steam, corrosive media, slurries, oils, liquid metals and radioactive media. Valve according to the material is also divided into cast iron valves, cast steel valves, stainless steel valves, chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, dual-phase steel valves, plastic valves, non-standard custom valve material. So, in the long-term use of the valve should be how to maintain it? Do not use long levers or long spanner wrenches when closing or opening valves. Stem thread often with the stem nut friction, the screw should be maintained at a certain amount of oil, lubrication, valve stem to ensure free movement, flexibility to use. Valve mechanical transmission, the timely addition to the gearbox to prevent biting. Long-term open the valve, the sealing surface may be stained with dirt; off, the valve can be gently closed, and then open a little, so you can use high-speed flow of media to wash away dirt, and then closed. Install the valve in the outdoor, to protect the protective sleeve on the stem to protect it from rain, snow, dust rust should always clean the valve, check to keep all parts of the valve clean and complete. Do not place heavy objects on the valve, not to stand on the valve. Open the steam valve, the system must first exclude the condensation of water, and then slowly open the valve, so as to avoid the impact of soft drinks; when the valve is fully open, the hand wheel should be reversed a little. Spare valve should be placed in a dry place indoors, sealed with wax cardboard or plug the interface to prevent dirt from entering.

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