| 摘要 |
PURPOSE:To prevent the condensated water from flowing into a pressure reducing valve by providing an automatic drain valve at the upstream side of a main valve port to discharge the condensated water to outside. CONSTITUTION:A casing of a pressure reducing valve consists of a spring case 2 storing a pressure setting spring 1, a valve case 4 containing a plot valve 3, a main body 6 having a main valve 5, a trap main body 8 forming a condensed water stay room 7, and a button cover 9. An inlet 28 and an outlet 18 are provided to the main body 6 and separated from each other by means of a horizontal wall 29. While the inlet 28 links the outlet 18 via a main valve port 30. The valve 5 is set under the port 30 and the upper end of the valve 5 interlocks a piston 30. The main body 8 is attached to the main body 6 via a gasket 56 and contains the room 7. A drain valve port 63 of the cover 9 is opened and closed by a float 58 to discharge automatically the water stayed in the room 7 through a drain port 64. In such a way, the flow of the condensated water is avoided to the pressure reducing valve.
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