Abstract: A solenoid valve is arranged in a flow path in which a fluid flows in both directions, and is constituted from a solenoid valve mounting portion, in which a first port and a second port are formed, and a single solenoid valve portion. A first flow rate stabilizing orifice is disposed between the first port and a valve body of the solenoid valve portion, and a second flow rate stabilizing orifice is disposed between the second port and the valve body. A bypass orifice is disposed in a bypass flow path that bypasses the first flow rate stabilizing orifice and the second flow rate stabilizing orifice.

Abstract: A solenoid valve is arranged in a flow path in which a fluid flows in both directions, and is constituted from a solenoid valve mounting portion, in which a first port and a second port are formed, and a single solenoid valve portion. A first flow rate stabilizing orifice is disposed between the first port and a valve body of the solenoid valve portion, and a second flow rate stabilizing orifice is disposed between the second port and the valve body. A bypass orifice is disposed in a bypass flow path that bypasses the first flow rate stabilizing orifice and the second flow rate stabilizing orifice.

Abstract: A movable iron core unit includes a movable iron core, which is attracted toward a fixed iron core under excitation of a coil, and a guide member made from a resin material and mounted on an outer circumferential side of the movable iron core. The guide member is constructed from a pair of ring members and connecting members that interconnect the ring members. The ring members and the connecting members are mounted in mounting grooves, which are formed on an outer circumferential surface of the movable iron core, and project only slightly from the outer circumferential surface.

Abstract: A movable iron core unit includes a movable iron core, which is attracted toward a fixed iron core under excitation of a coil, and a guide member made from a resin material and mounted on an outer circumferential side of the movable iron core. The guide member is constructed from a pair of ring members and connecting members that interconnect the ring members. The ring members and the connecting members are mounted in mounting grooves, which are formed on an outer circumferential surface of the movable iron core, and project only slightly from the outer circumferential surface.

Abstract: A flow rate control valve comprises a rotary driving source which is rotated by a control signal, a movable member which is displaceable by the aid of a transmitting shaft under a rotary action of the rotary driving source, a valve mechanism which is connected to the end of the movable member and which is capable of being seated on and separated from a valve seat of a valve body, and a balance mechanism which is integrally connected underneath the valve mechanism with a connecting shaft intervening therebetween. When the valve opening degree is changed in a state in which pressure fluid is supplied into the valve body, the balance mechanism maintains an equilibrium state with respect to the valve mechanism.

Abstract: A flow rate control valve comprises a rotary driving source which is rotated by a control signal, a movable member which is displaceable by the aid of a transmitting shaft under a rotary action of the rotary driving source, a valve mechanism which is connected to the end of the movable member and which is capable of being seated on and separated from a valve seat of a valve body, and a balance mechanism which is integrally connected underneath the valve mechanism with a connecting shaft intervening therebetween. When the valve opening degree is changed in a state in which pressure fluid is supplied into the valve body, the balance mechanism maintains an equilibrium state with respect to the valve mechanism.