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.

阀门有一定开，开始工作时，冷凝水与空气从A排放。着温，感温元件(阀芯)内的顶杆，向A移动。

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.

温继续，阀内温超过该阀感温元件所排水温时，顶杆的位移使A关闭。