Dilute phase conveyingdilute phase is a suspension flows wherein the substance for be conveyed is introduced into a moving air stream inside a pipeline. For the material to remain in suspension exists a minimum conveying velocity which varies for different materials. The total number of substance that is fed into an air stream is also dependent on material frequency distribution, Sieve analysis etc, Characteristics like, Particle size bulk the material, Density. Generally to air ratio varies between 3 to 10 kg of material to kg. Of air. Conveying velocities are in the selection of 18 to 28 m/sec relying on the product characteristics. The dilute phase conveying system uses low, Pressure air at pressures less than one bar should there be pressure conveying and, 5000 mm in case of vacuum convening, Which is generated by positive displacement type roots blowers or by centrifugal blowers. Dilute vacuum transport in phases systemthese setups are installed wherein multiple feed points are involved. The advantage of this The arrangement serves as any leakage is inward due to which these systems are popular for conveying of explosive or hazardous products. As the configuration is operating below the atmospheric pressure the conveying velocities are generally higher than the pressure conveying. These systems are also popular for short distance conveying in food as well as the healthcare sector