Explanation of common faults in the actual use of valve positioners

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　　When using valve positioners, various faults or issues may occasionally arise. As a supplier of positioners, we can provide you with solutions to these problems. Next, we will introduce some of the problems that may arise when using positioners. 　　1. During pipeline welding, the valve positioner is used; however, the pipes do not align on the same center line after alignment, there is no gap between them, thick-walled pipes are not beveled, and the height and width of the welds do not meet the requirements of the construction specifications. 　　Consequence: When the ends of the pipes are not aligned on the same center line, it directly affects the welding quality and the overall appearance. There are no gaps at the joints; thick-walled pipes do not require beveling. If the height and width of the welds do not meet the specified requirements, the welds will not have the necessary strength. 　　Measurements: The height and width of the welds must be welded in accordance with the specification requirements. After aligning the pipes to be welded, they must be on the same center line, with no misalignment between them ； Thick-walled pipes require beveling ； A gap should be left for alignment. 　　2. The pipes are buried directly in untreated loose soil or on frozen ground; the positions and spacing of the pipe supports are inadequate, and in some cases dry brick stacking is used. 　　Consequence: The pipeline was damaged during the compaction of the backfill, resulting in rework and repairs; this was likely due to unstable support. 　　Measure: Brick piers should be constructed with cement mortar to ensure they are firm and intact. Pipes must not be buried in untreated loose soil or frozen soil; the supports must be secure, and the spacing between supports must comply with construction standards. They should not be subjected to shear forces, especially at the pipe joints. 　　3. There are no embedded parts or pre-drilled holes in the building structure construction; the embedded parts are not marked, and the size of the pre-drilled holes is too small. 　　Consequences: During the construction of heating and ventilation systems, the building structure is damaged, and in some cases the load-bearing rebar is severed, which affects the safety of the building. 　　Measures: Thoroughly study the construction drawings for heating and plumbing projects, and in accordance with the requirements for installing pipes as well as supports and hangers, proactively and carefully coordinate with the installation of embedded components and pre-made holes in the building structure, following the design specifications and construction standards. https://img-blog.csdnimg.cn/20200903135833652.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21tZGx0MTIz,size_16,color_FFFFFF,t_70​data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==