2、能够阻止高温凝结水的排放，保持蒸汽管线的热能。
3、连续排放，没有噪音。蒸汽压力的小波动没有影响使用。
4、结构简单，安装方便，随意。
5、具有良好的排空性能，不怕冻。零泄漏，背压率达到75%以上。
Introduction:The heat sensing parts of bellow trap is the volatile bellow and check valve.
Structure:1.The temperature for discharging water ranges from 70℃ to 100℃.
2.Able to resist the discharge of condensed water of high temperature and keep the heat of the steam piplines.
3.The discharge for discharge of condensed water in continuous way without noise.The slight change of the steam pressure will not affedt its operation.
4.Simple structures will facilitate installation.
5.The smount of condensed water discharged will rise through the diameter expansion of the bellow.
6.Excellent abilities to discharge gas.No leskage;the rate of back pressure up to ablove 75%