| 摘要 |
PROBLEM TO BE SOLVED: To prepare a four-way selection valve using a simple plunger type one-way electromagnetic valve. SOLUTION: Valve assemblies 500 (500a-500d) are inserted to a flow passage of sides of quardangle or a diagonal formed by a flow passage port 81 (81a-81d) and an excitation coil assembly 600 (600a, 600b) is commonly externally attached on two valve assemblies of opposite sides and the diagonal so as to constitute a parallel magnetic circuit. Two desired flow passages are selectively opened for flow by energizing any one of these total two coil assemblies and shielding the other.
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