| 摘要 |
An object is to decrease the length of a valve housing (1), to reduce a pressure loss at a second port (21), and to prevent a valve member (3') from swinging in a pressure balance type of electromagnetic control valve in which the influence of the difference in pressure between a first port (11) and the second port (21) which is exerted upon a valve body (31) is cancelled so that the opening of the valve body (31) varies in a proportional manner. An electromagnetically-driving section (5), an adjusting spring (83) (setting adjustment section (8)), a pressure equalizing chamber (13), and a diaphragm 4 (pressure sensing section) are disposed opposite a valve port (22) on an axis line L of the valve port (22) with the valve body (31) therebetween. The valve body (31), and an aperture (31a), a vertical path (32a), and a lateral path 32b in the valve member 3 (pressure equalizing path) ensure electrical continuity between the valve port (22) and the pressure equalizing chamber (13). The valve port (22) is coaxial with the second port (21) . A tapered surface (33d) is formed in the lower end portion of the valve body (33), and a helical compression spring (15) causes a sliding surface (14b) of a spring holding member (14) which has a spherical shape to abut on the tapered surface (33d). |
