All wind pressure fan works when the impeller rotates, centrifugal force, prompting the benchmark gas outward movement forward, forming a series of spiral movement. Air between the blades of the impeller rotating spiral accelerated beyond the gas pump and squeeze (suction from the suction port) side of the tank, when it enters the side of the channel after the gas is compressed, and then again back to the impeller blade between spin up. When the air along a spiral track through the impeller and the side groove,, with the rotation of the proceeds to increase the kinetic energy of the gas, so that the gas pressure along the side of the channel by a further increase. When the air reaches the side of the tank and the discharge flange connection point (side channel narrows at the exit), gas i.e. extruded blades and through the pump discharge outlet muffler.