| 摘要 |
<p>PROBLEM TO BE SOLVED: To make it possible to continue boiler operation even if a boiler water supply passage is closed in a portion in which a flowmeter is installed.SOLUTION: In a boiler water supply passage comprising: a water supply pipe 2 supplying water to a boiler 1; a water supply pump 3 installed halfway along the water supply pipe 2; and a flowmeter 4 installed downstream of the water supply pump 3 in the water supply pipe 2, and supplying boiler water pressurized by the water supply pump 3 to the boiler 1, one end of a bypass pipe 5 branched off from the water supply pipe 2 is connected between the water supply pump 3 and the flowmeter 4 in the water supply pipe 2 and the other end of the bypass pipe 5 is connected to a portion downstream of the flowmeter 4 in the water supply pipe 2, and a bypass valve 6 is installed halfway along the bypass pipe 5, the bypass valve 6 allowing a fluid to flow only in a direction of the boiler 1 from the water supply pump 3 while preventing the fluid from flowing in an opposite direction, and the bypass valve 6 automatically opening if primary side pressure is higher than predetermined pressure.</p> |
