| 摘要 |
PURPOSE:To obtain a differential pressure type flowmeter which can measure a high-temperature slurry stably for a long period, by obtaining a radiator by providing a surmounting part, connected to a fitting opening at a differential pressure lead-out and detection terminal, to an opening part provided to the upper wall part of a tube body. CONSTITUTION:Between the fitting opening of tube body 11 as the passage for fluid 12 and differential pressure lead-out and detection terminal 3, radiator 13 having diaphragm 1 in contact with the differential pressure lead-out and detection terminal, valve body 14C which opens and closes the passage between air supply opening 14b and air chamber 15 through the operation of contact liquid diaphragm 14a, and air sealing device 14 having restriction valve 14d are provided. When the pressure of air chamber 15 is greater than that of fluid 12 to be measured, valve body 14c is closed to reduce the pressure via communication path 14f and restriction valve 14d and when less, valve body 14c is opened to supply air 7 until the pressure of the fluid to be measured becomes equal to that of the air chamber, so that the pressure can be measured without conducting the heat o the fluid to be measured direct to diaphragm 1. |
