the number of passages that are present in the block if a block is used in the valve apparatus alternatively if a block is not used the number of apertures would depend on the number of valves that are desired the aperture 103 serves as an opening through which flow passes through preferably the flow would be an air flow alternatively the flow would be some other medium such as other gases or even liquids the aperture 103 is preferably a semicircular shape to conform to the shape of the passage 116 in the block 102 alternatively the aperture 103 is any other shape or pattern such as square rectangular etc the cylinder 106 includes an axis 99 that passes through the length of the cylinder 106 whereby the cylinder 106 is configured to rotate about the axis 99 fig2 a illustrates a perspective view of the variable valve in an open position according to the present invention it should be noted that he block 102 has been omitted from fig2 a u2013 2c for illustration purposes although it is not necessary that block 102 be used to practice the present invention as shown in fig2 a the barrels 204 and 206 are positioned such that the semi circular apertures 203 and 205 form a channel or conduit which is a complete circular aperture the channel is designated.