Rising the temperature continuously , when it in the valves runs over the temperature of drainage, the detrusion of top material causes the port A close.

阀门有一，始工作时，冷凝水与空气从A口迅速排放。着升高，感元件(阀芯)内的顶杆，向A口。

Rising the temperature continuously , when it in the valves runs over the temperature of drainage, the detrusion of top material causes the port A close.

继续升高，阀内超过该阀感元件所排水时，顶杆的位使A口关闭。