Truck Blower Sizing and Selection for Dry Bulk Transport

To calculate CFM for dry bulk unloading, you must factor in the material type, whether it’s cement, grains, or pellets, and the required air velocity. Our guide explains how to use pipe diameter and pressure to determine the ideal CFM range for your positive displacement blower.

Radial vane blowers are quieter and ideal for lower CFM needs, while rotary lobe blowers handle higher CFM and pressures. In pneumatic conveying, the guide shows when each design is best for your bulk material flow.

PTO drives are common for truck-mounted bulk blowers, while hydraulic drives offer flexibility for stationary or portable setups. The guide compares scenarios from chemical plants to food-grade unloading, to help you choose the right drive.

Fine powders such as cement require higher air velocity to remain suspended during pneumatic conveying and bulk unloading. Insufficient velocity can cause material fallout, line plugging, and extended unloading times. The Truck Blower Sizing Guide explains how to determine the correct conveying velocity based on material density, pipe diameter, and system pressure, helping operators avoid overheating, inefficiency, and premature blower wear.

In many cases, a single positive displacement blower can handle multiple dry bulk products, but only if it is sized for the worst-case airflow and pressure requirement. Materials like powders, granules, and pellets each require different air velocities. This guide walks through how to evaluate multiple products, select the highest required CFM and pressure, and ensure the blower operates safely and efficiently across all applications.

Comparing blower models requires evaluating required CFM, operating pressure, drive type, product characteristics, and unloading method. Simply choosing the largest blower is not always the best solution. The Truck Blower Sizing Guide includes comparison charts and real-world examples to help fleet managers, OEMs, and operators match blower design types such as rotary lobe, screw, or rotary vane, to trailer configuration and bulk material requirements.