| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure reducing valve not reducing a controlled flow rate with a mechanism to roughly offset bi-directional thrusts each other by generating the opposite directional thrust matching to a secondary pressure in order not to obstruct a lever operation when the operating force of the lever is increased by unidirectional thrust generated by the secondary pressure, in comparison with a conventional pressure reducing valve without the mechanism. SOLUTION: This pressure reducing valve receives against the secondary pressure and a pressure to either of the two secondary pressure, which oppose each other, via a piston from the outside. Accordingly, the reducing valve has spools moving in holes set in a block. The secondary pressure, corresponding to the moving amount of the spool, is reduced from a primary pressure. Furthermore, in the reducing valve that outputs arbitrarily, either of the two secondary pressures receives not a spool but the piston (52) via a channel (15) that is set in the block (41) to communicate from the secondary pressure side to the piston (52).
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