Chint 1 Y-valve 
 http://www.wzztlj.com/843.htm 
 Category melt valve 
 http://www.wzztlj.com/rongtifa.htm 
 Routine maintenance of a valve, the valve should be kept dry and well ventilated room, access to be blocked at both ends. 2, long-term storage of the valve should be checked regularly to remove dirt, rust and oil in the processing of the surface coating. 3, after installation, should be checked regularly, mainly to check: (1) sealing surface wear. (2) stem and stem nut wear trapezoidal thread. (3) packing is outdated, should be replaced if damaged. (4) valve repair assembly, sealing performance test should be carried out. Operation of the valves, all valves should be complete and intact. Flange bolts and brackets on the indispensable, threads should be in good condition, does not allow loosening. Hand-tighten the nut on the wheel, if found loose should be tightened in time to avoid wear and tear or loss of connections and hand-wheel plate. Hand wheel if lost, is not allowed to use wrenches instead of living, should be promptly installed for. Gland is not allowed skew or no preload gap. Of vulnerable rain and snow, dust, sand and dirt contamination of the environment of the valve, the valve stem to install protective cover. Valve on the gauge should be kept complete, accurate and clear. Valve seals, cap, pneumatic accessories, should be complete and intact. Insulation jacket should be free of dents, cracks. Does not allow the operation of the valve on the beat, stand or support weight; especially non-metallic valves and cast iron valves, but also to prohibit 
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 Sphere http://www.renkev.com/ 
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