Valve maintenance skills
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Release Time：2017-11-27
The valves used in various fields are of various types and different structures. The maintenance of each valve should be carried out according to the specific structure. 1. the maintenance of the valve body and bonnet The valve body and bonnet are the most external closed shells of the valve, which are used to withstand the pressure of the medium, the additional force during operation, the weight of other parts of the valve, and the tightening force of the flange or thread at the connection. Valve body and bonnet requirements have a certain strength and stiffness, their damage is mainly medium corrosion, erosion and mechanical damage caused by local defects, when due to corrosion or erosion caused by wall thinning, and affect their strength and stiffness, it can not be repaired, should be replaced. During maintenance, the valve
The valves used in various fields are of various types and different structures. The maintenance of each valve should be carried out according to the specific structure.
1. Body and Bonnet Service
The valve body and the valve cover is the most external closed shell, used to withstand the pressure of the medium, the additional force during operation, the weight of other parts of the valve, and the tightening force of the flange or thread at the connection. Valve body and bonnet requirements have a certain strength and stiffness, their damage is mainly medium corrosion, erosion and mechanical damage caused by local defects, when due to corrosion or erosion caused by wall thinning, and affect their strength and stiffness, it can not be repaired, should be replaced.
During maintenance, the valve body and valve cover should be subjected to hydraulic strength test first, and then water, compressed air, kerosene or other media to check its tightness. The defects of the valve body and the valve cover are generally repaired by welding, and the corresponding welding rod and welding process are selected according to the different materials. Defective metal shall be cleaned before welding repair, and inspected and trimmed after welding repair, and stress shall be relieved.
Maintenance of 2. filling room
The maintenance of the packing room includes the replacement of the packing and the inspection and repair of the packing box. When selecting fillers, the conditions of use and the medium must be considered.
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