Pneumatic conveying throughput is the mass of solids delivered in a defined time. Blower flow is the volume of gas supplied at stated inlet conditions. The two are related through the material and system, but they are not interchangeable. A large airflow does not guarantee a high solids rate, and a high-capacity feeder does not guarantee that the pipeline can transport what it releases.
Define the Required Production Result
The buyer should distinguish average production, maximum continuous rate and short peak rate. Batch systems also need cycle time, fill and empty duration, and the number of cycles per hour. A requirement such as “20 tonnes per hour” is incomplete unless the material, route and acceptable variability are stated.
The delivered rate should be measured at the receiver where possible. Feed command or feeder speed may not reveal material retained in the line, lost to filtration or circulating during an unstable condition.
Establish a Repeatable Material Feed
Rotary valves, screws and other feeders have a theoretical displacement, but actual output depends on pocket filling, bulk density, venting, pressure difference and material flowability. Air leakage through the feeder also consumes blower capacity.
A controlled gravimetric or weigh-based trial is preferable to assuming that every rotor revolution transfers a full volume of material. The test should cover the minimum and maximum hopper levels expected in production.
Match Airflow to Pipe Bore and Material
Effective conveying airflow must maintain a stable velocity through the complete route. Too little air can cause saltation, surging or blockage. Too much air raises pressure loss, wear, degradation and filter demand.
Pipe diameter therefore cannot be selected from throughput alone. A larger pipe lowers gas velocity at the same flow and may require a larger blower to preserve stability. A smaller pipe may achieve velocity but create excessive resistance and particle impact. Material trials or validated correlations are needed to locate a practical operating window.
Test the Full Pressure Budget
Normal system pressure includes clean-air pipe loss, gas-solid interaction, vertical lift, bends, feeder connection, receiver entry and filtration. The maximum expected duty should include dirty-filter resistance, the most restrictive permitted route and credible production variation.
Pressure should be recorded during startup, stable conveying, route changes and line clearing. A test that averages these stages can hide short peaks that determine motor power, discharge temperature or relief-valve activity.
Convert Trial Data to Reference Conditions
Airflow must be reported at agreed pressure and temperature conditions. Actual inlet volume, standard volume and free-air flow are not automatically equal. Altitude and hot ambient air reduce inlet density and can change the volume required for the same gas mass.
The trial record should state where the airflow and pressure were measured, the instruments used and their uncertainty. This allows the result to be transferred to a blower curve without guessing.
Confirm the Model at the Required Operating Points
Pasifik Blower offers two-lobe and three-lobe positive-pressure roots blowers across an approximate portfolio range of 30–9,360 m³/h and up to 1,000 mbar. The selected model must provide the effective inlet flow at each required pressure while remaining within speed, motor-power and discharge-temperature limits.
The published endpoints do not establish conveying throughput. They define the broad air-supply range available for evaluation. Material rate remains a result of feeder performance, route resistance and the verified conveying regime.
Acceptance Testing After Installation
Commissioning should compare measured receiver throughput, airflow, pressure, motor current and product quality with the approved design cases. A capacity test must specify material condition, route, filter state and test duration. Short tests with a clean line may not represent a full production shift.
By validating the complete chain—from hopper discharge to receiver—weighing—the project converts a marketing capacity target into an auditable blower duty. That data gives Pasifik Blower a sound basis for model selection and gives the buyer measurable performance criteria for the installed system.
Glossary
Acceptance test: Agreed procedure demonstrating installed performance under defined operating conditions.
Delivered throughput: Mass of material received per unit time at the stated destination.
Peak rate: Highest short-duration production rate required or measured within a defined period.
Production variability: Change in solids rate or material condition occurring during normal manufacturing.
Test duration: Length of the measurement period used to calculate and evaluate performance.