Vacuum control valve and the vacuum control system

Providing a vacuum control valve, and a vacuum control system. Vacuum control valve comprising: a valve body having a valve seat connected to the vacuum chamber and the vacuum pump flow path, the flow path is formed; operation portion, having a valve body, a piston, a piston rod connected to the valve body and the valve body by adjusting the lift amount valve opening degree control, by cutting off contact with the valve seat contact passage; cylinder, the control valve body and connected to the housing and the piston; pressing portion, the lift amount decreases in the direction of the pressing operation portion; regulator, follow the movement of the piston, the seal gap between the outer circumferential surface of the cylinder and the inner circumferential surface of the piston. An operation portion and the cylinder comprising: a valve opening degree of the control chamber, is sealed and a space having a cylindrical form surrounded by a pressure-regulating valve stem, a load is generated in the direction of increasing the amount of lift of the piston according to the action of the pressure of the working fluid; cutting load generating chambers, formed inside the rod, and the central axis of the valve opening degree of the co-operating room, when working fluid is supplied, the operation load is generated on the portion that the lift amount decrease direction.