| 摘要 |
PURPOSE:To eliminate the corrosion trouble due to the cavitation erosion in a fuel oil pipe due to the opening of a check valve at the time other than the normal time when water is poured into a fuel oil pipe. CONSTITUTION:As far a water injection device, a water pipe between a water injection solenoid valve 31 and a check valve 14 is branched, and a solenoid valve 34 for drainage is installed at the top of the branched water pipe, and the water injection device has the structure for lowering the residual pressure in a water passage and the opening of the check valve is prevented and the inflow of water into an oil passage is prevented, even if the pressure in the oil passage lowers. |
