Abstract
The steam trap plays the role in steam blocking and drainage.The appropriate trap can make the steam heating equipment to achieve the highest efficiency. To achieve the best results, it is necessary to have a comprehensive understanding of the performance and characteristics of various types of traps. This paper mainly introduces the types, principles, application occasions and characteristics of drain valves, and analyzes the types of drain valves that should be selected in the process of oil tank heating and the problems that should be paid attention to in use
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