It is a part of Pneumatic conveyor which is used for both bulk and unit movement of materials. In this conveyor air pressure is used to convey materials through a system of vertical and horizontal tubes. The major advantages of this pneumatic conveyor are that materials are completely enclosed and it is implement turns and vertical moves. The dilute-phase pneumatic conveyor moves with a mixture of air and solid. Push is the positive pressure material system pushes the material from entry point to several discharge points. Pull is negative pressure or vacuum system move material from several entry points to one discharge point. Push-pull systems are combinations with multiple entry and discharge points. Both positive-pressure and vacuum, dilute phase systems ranging from single-point "up-and-in" installations to cross-plant systems with multiple pick-up and discharge points and automated controls, fully integrated with other Flexicon equipment and new or existing processes.