| 摘要 |
PROBLEM TO BE SOLVED: To provide a fitting structure of a metal touch type pressure opening valve capable of effectively preventing deterioration of seal performance, even when temperature difference between the inside and outside of the pressure opening valve is made large.SOLUTION: A fitting structure 40 of a safety valve 20 in this embodiment fits the safety valve 20 to a boiler 1 through a fitting pipeline 30 branching from a steam line L3. Then, a pipeline length l of the fitting pipeline 30 is set so that temperature difference between the external surface and internal surface of a pressure valve opening valve from activation of the boiler to steam start is 50°C or less. Also, the fitting pipeline 30 includes an elbow part 31 connected to the steam line L3, and a straight pipe part 32 formed into a linear shape and connecting the elbow part 31 and the safety valve 20.SELECTED DRAWING: Figure 2 |
