Abstract: A valve that closes automatically when infers a leak in a supply network of liquid or gas fluids where it is installed. The closure of the valve is performed by a stem connected to a mechanism of rod-crank-slider that displaces a shutter, the stem is activated at the same time by an actuator that allows to release the potential energy of a flat coil torsion spring.

Abstract: The invention relates to a device for saving, protecting and portioning toilet paper, said device being designed to portion the quantity of toilet paper supplied to the user by adjusting the predetermined quantity or length of paper dispensed, and the programmed time between one dispensation and another. In addition, the features of the device prevent all or a portion of the paper from being stolen, and the front screen of the device permits the user to know when they may access a new dispensation of paper by operating an actuating means. In this way, the user does not have access to all the paper at once, so they cannot steal or waste same, reducing the cost of operating and maintaining toilet areas, and improving the appearance of the toilet service.