Import valve maintenance skills

With the development of the social economy, the use of imported valves is becoming more and more widespread, in the pipeline used in a wide variety of imported valves, different structures, and * easy to damage the pipeline accessories, the overhaul of each valve, should be carried out according to the specific structure, in the pipeline used in a wide variety of valves, different structures, and * easy to damage the pipeline accessories, the overhaul of each valve.

The famous brand of imported valves Germany… The technical engineer summarized the following points of the program for reference only.

1, the valve body and cover of the valve body and cover is the valve * external closed shell, to withstand the pressure of the medium, the additional force of operation, the weight of other parts of the valve, and the connection flange or threaded tight force. Valve body and cover require a certain strength and stiffness, their damage is mainly media corrosion, erosion and mechanical damage caused by local defects, when the corrosion or erosion caused by wall thinning, to affect their strength and stiffness, it can not be repaired, should be replaced.


Inspection, the valve body and valve cover should ** hydraulic strength test, and then use water, compressed air, kerosene or other media to test its tightness. Valve body and valve cover defects are generally used to fill the method of welding, according to the material of the corresponding choice of welding rod and welding process. Before welding the defective metal should be cleaned, after welding should also be checked and trimmed, and eliminate stress.

2, the filler room maintenance The filler room maintenance includes the replacement of filler and the filler box parts inspection and repair. When selecting the packing, we must consider the conditions of use and media. Generally speaking, oil-infested asbestos packing is suitable for air, steam, water and heavy oil products at certain temperature. Graphite asbestos packing can be used under high temperature and pressure conditions, especially graphite asbestos packing with steel wire is more resistant to pressure. Asbestos and lead packing can be used for high temperature media with frequent temperature changes. Strongly corrosive media can be used with Teflon asbestos packing or Teflon braiding.