The role of the trap is to automatically discharge the steam Pilot Air Control Valves and equipment generated in the condensate and non-condensable gas, and can effectively prevent the steam emissions, to ensure the normal operation of steam equipment. In the chemical design, often encountered steam traps (also known as traps), but because the trap system is only a small attachment, and often not the designer attention. According to reports, China's annual about 300 million sets of traps in use, but up to 70% to 75% of the poor use, which in addition to the middle of the trap itself because of the reasons, the main reason is in the system design and selection There is a problem.