| 摘要 |
<p>An object is to provide a thinner protection valve with a regular sequence of valve opening. For a purpose of accomplishing the object, a protection valve 1 includes: an input chamber (a) into which air is introduced; a plurality of output ports P21 to P29 through which air is discharged; and safety valves which open in response to a pressure increase on a primary side or close in response to a pressure decrease on a secondary side, the safety valves including a safety valve PV21 provided corresponding to the output port P21 and a safety valve PV23 provided corresponding to the output port P23. An air flow path from the input chamber (a) is branched into a first branch line (b) and a second branch line (c), and a time lag-creating valve TMV having an opening pressure higher than the safety valve PV21 is provided at a upstream side of the safety valve PV23 in the second branch line (c), so that the safety valve PV23 can open with a time lag after the safety valve PV21 opens, regardless of the difference between the opening pressure of the safety valve PV21 and the opening pressure of the second the safety valve PV23.</p> |
