| 摘要 |
PURPOSE:To obtain sufficient anticorrosive effect with simple structure by sectioning the inside of a device into two chambers, and providing a measuring liquid injection intake and an air vent. CONSTITUTION:An instrument pipe 2 is branched from a sea water system pipe 1, and a pressure gauge 4 is connected through an instrument initial valve 3 and a liquid isolation device 6. In the device 6, a liquid isolation plate 8 separating a measured-liquid (sea water) chamber and a measuring-liquid (fresh water) chamber is capable of sliding on the internal wall of a main device body 7, and a fresh water injection intake 11 and an air vent 12 for internal air for the introduction of sea water are provided. Therefore, the pressure of the sea water is transferred to the fresh water as it is and the pressure of the sea water in a main pipe 1 is measured by an instrument 4. |
