| 摘要 |
PROBLEM TO BE SOLVED: To easily mount a measuring jig to a gage port at calibration in a valve constituted by integrally assembling a spool valve and a pair of servo valves for outputting pilot pressure to each pilot chamber of the spool valve. SOLUTION: A pair of servo valves 7A and 7B are disposed together on the upper side of the spool valve 2. The gage ports 12A and 12B of both servo valves are thereby positioned on the upper side of the spool valve 2.
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