Abstract: There is provided a solenoid valve that realizes space-saving by reducing the size of a dedicated driving power source. There is provided a solenoid valve capable of instantaneously opening and closing that includes an electric double layer capacitor having a low direct current internal resistance and a low equivalent series resistance as a motive power supply. The electric double layer capacitor has single-cell electrical properties including a capacitance of 1 to 5 F, a rated voltage of 21 to 2.7 V, a direct current internal resistance of 0.01 to 0.1?, and an equivalent series resistance at 1 KHz of 0.03 to 0.09?, and includes a polarizable electrode made of glassy carbon having a specific surface area of 1 to 500 m2/g.

Abstract: [Problem] To provide a regulating valve device having a valve element opened or closed by a working fluid. [Solution to Problem] A valve element 310 has a structure in which a valve head 310a and a valve body 310b are coupled by a valve stem 310c. In the valve box 305, the valve element 310 and a power transmitting member 320a are slidably housed. A first bellows 320b is fixed to the power transmitting member 320a and the valve box 305 to form a first space Us at a position on a side of the power transmitting member 320a opposite the valve element. A second bellows 320c is fixed to the power transmitting member 320a and the valve box 305 to form a second space Ls at a position on a side of the power transmitting member 320a closer to the valve element.

Abstract: There is provided a solenoid valve that realizes space-saving by reducing the size of a dedicated driving power source. There is provided a solenoid valve capable of instantaneously opening and closing that includes an electric double layer capacitor having a low direct current internal resistance and a low equivalent series resistance as a motive power supply. The electric double layer capacitor has single-cell electrical properties including a capacitance of 1 to 5 F, a rated voltage of 21 to 2.7 V, a direct current internal resistance of 0.01 to 0.1 ?, and an equivalent series resistance at 1 KHz of 0.03 to 0.09 ?, and includes a polarizable electrode made of glassy carbon having a specific surface area of 1 to 500 m2/g.