| 摘要 |
According to the present invention, a makeup water supply valve of a boiler having an air gap forming means supplies makeup water to a heating water pipe by means of a simple operation of rotating an operation knob, and an air gap is automatically formed in the makeup water supply valve when the supplying of the makeup water is completed. Since the heating water pipe and a direct water pipe are maintained in a completely separated state by means of the air gap formed in the makeup water supply valve, the heating water flowing backward can be essentially prevented from flowing into the direct water pipe even if the heating water leaks and flows backward from the heating water pipe. In addition, a drain valve for discharging the heating water during the repair or replacement of the boiler is integrally formed at the makeup water supply valve of the present invention, thereby reducing an effort of separately providing the drain valve, and reducing costs. |
