PROBLEM TO BE SOLVED: To always change water filled in chambers on both ends of a spool, prevent microorganisms from being generated and water from corroding, 4 prevent dust from being accumulated by discharging it to the outside, and also cool a solenoid by taking heat generated from the solenoid, in a hydraulic electromagnet proportional control valve. ;SOLUTION: In an electromagnet proportional control valve 1 for controlling the valve opening by proportionally controlling the displacement of a spool 4 from the neutral position by an electromagnetic proportional solenoid 10 according to an input signal, fresh water is used as operating fluid, a passage 16 for introducing pressure fluid into chambers C1, Cr on both ends of the spool 4 is formed, and drain holes 6 are formed on the chambers C1, Cr.;COPYRIGHT: (C)1997,JPO
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