IN-TANK VALVE

PROBLEM TO BE SOLVED: To reduce the size and the weight of an in-tank valve and a tank.SOLUTION: A main stop valve 10 includes a body 11 fixed to a hydrogen tank 2 with a part thereof being inserted in the hydrogen tank 2, a first passage 15 formed in the body 11 and communicated with the inside of the hydrogen tank 2, a second passage 17 formed in the body 11 and communicated with the outside of the hydrogen tank 2, a pilot passage 29 communicated with the second passage 17 from the inside of the hydrogen tank 2, an electromagnetic pilot valve 30 for opening/closing the pilot passage 29, and a main valve 18 which is opened by using the thrust to be obtained by the pressure rise in the second passage 17 caused by opening the pilot valve 30 and the thrust to be obtained by the differential pressure between the first passage 15 and the pilot passage 29, and communicates the first passage 15 with the second passage 17, and is capable of distributing hydrogen gas in the hydrogen tank 2 with the flow rate larger than that of the pilot valve 30. The pilot valve 30 is installed on the body 11 so as to receive the pressure in the hydrogen tank 2.