| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a decompression valve which is equipped with a piston inclination preventive mechanism capable of being applied for a decompression valve with a structure in which a valve inflow port and a valve outflow port are orthogonal to each other, without enlarging the decompression valve.SOLUTION: A decompression valve 1 having a primary side passage 4, a secondary side passage 5, and a water cut-off function for variably adjusting a flow passage of a boundary portion between the primary side passage and the secondary side passage, includes: a valve body 33 which has a piston head 32a slidably inserted in a cylinder 31 and reciprocating in an extending direction of a center axis of the cylinder, a first piston rod 32b extending coaxially with the piston head from one end and projecting to the outside from the one end, and a second piston rod 32c extending coaxially with the piston head from the other end of the piston head and projecting to the outside of the cylinder from the other end of the cylinder, and projects to the outside of the cylinder of the first piston rod to be fixed to a cylindrical valve seat at one end of the cylinder; and a mechanism which is arrange coaxially with the cylinder, and slides with an end portion separated from the piston head of the second piston rod to guide the second piston rod in a center axis direction of the cylinder.</p> |
