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From whatever point of view, the vacuum blast cleaning process is economical. On the one hand, vacuum machines are generally cheaper than compressors, so the total investment will be reduced; on the other hand, the necessary inspection costs for pressure vessels and pressure equipment are completely unnecessary. Maintenance of the system is generally limited to replacing, cleaning the filter, and replacing wear parts. In fact, it can also use a variety of commonly used spray material. The consumption of the spray material is very small because no shots are lost in the closed system.
Partial cleaning of the wheelset, the vacuum shot peening equipment used in the overview of the air, through the filter unconsumed spray material can be recovered and sent back to the shot peening process. After that, the air will eventually be purified and its work completed. Depending on the specific conditions, the shot peening cycle can be between 5 and 500 cycles. Under the conditions of Berlin City Metro and Deutsche Bahn AG, a cheap shot peening can generally complete 6-8 cleaning cycles. Therefore, if the shot peening quality is required, quality shot peening may also be selected because it can be fully utilized for a long period of time, and the process advantages of vacuum blast cleaning can be fully utilized to achieve a good cost/characteristic ratio. In addition, it is also possible to not invest additional costs in expensive labor protection measures. The latest development is the use of vacuum blasting equipment for surface zinc coating at room temperature. Even when a special zinc powder mixture is used to "spray" into a zinc coating, it is attractive as a variety of different rust protection measures. Again, there is often a need to make a particular surface, in particular to create the required surface roughness.
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