| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pressure reduction valve with a cut-off function.SOLUTION: A pressure reduction valve 1A comprises: a first pressure reduction mechanism 2 for reducing a primary pressure fluid to a first set pressure; and a second pressure reduction mechanism 5 for reducing the first set pressure fluid to a second set pressure. The second pressure reduction mechanism 5 includes: a secondary side slide chamber 54 communicated with an intermediate pressure chamber 52 via a communication passage 53; and a secondary side valving element 6 having a head 61, a shaft 62, and a pressure regulation part 63. A reduction orifice is formed between a secondary side valve seat 51 and the head 61; and the pressure regulation part 63 partitions the secondary side slide chamber 54 into a decompression chamber 55, in which the second set pressure fluid after passing through the reduction orifice is introduced, and a spring chamber 56 opened to an ambient air. The shaft 62 is extended from the head 61 until the pressure regulation part 63 by passing through in the communication passage 53. Inside the spring chamber 56, a spring 72 is arranged for urging the pressure regulation part 63 of the secondary side valving element 6 toward the head 61.</p> |
