Sizing a Pneumatic Conveyor: Capacity, Material Type, and Route Planning Explained

Pneumatic conveying looks straightforward from the outside — pipework and a vacuum source — but real-world performance depends on matching pipe diameter, vacuum capacity, and pickup configuration to your specific material and route. Here's what to check before locking in a design.

System Type and Core Specifications

ENZAC's pneumatic conveying systems operate on negative-pressure (vacuum) conveying:

• Distance capability: up to 100 meters
• Typical capacity range: 0.5–20 tonnes per hour, varying by material and distance
• Pickup configuration: single or multiple sequenced pickup points

Capacity and distance trade off against each other — a system sized for the upper end of the capacity range won't necessarily hold that capacity at the maximum distance, since longer runs mean more pressure drop for the vacuum source to overcome.

Vacuum Source Options

Three types of vacuum source are used depending on the application's capacity and pressure requirement:

• Rotary vane pumps — suited to moderate capacity, continuous-duty applications
• Regenerative blowers — lower-maintenance option for lighter-duty applications
• Venturi units — simplest option, no moving parts, suited to lower-capacity or intermittent duty

Filtration and Separation

An integrated filter receiver separates material from the air stream before discharge, using either pulse-jet or shaker cleaning to keep the filter media clear during continuous operation. Filter selection affects both system uptime (how often cleaning cycles interrupt conveying) and fine-particle capture efficiency — this is not a component to leave as a generic afterthought in the spec.

Construction Materials

Pipework and receiver vessel are available in carbon steel or stainless steel, selected based on product contact requirements — hygiene, corrosion resistance, or contamination-sensitivity of the material being conveyed.

Material Compatibility

The system is designed for free-flowing powders, granules, and pellets, rated from non-abrasive to moderately abrasive. Materials outside this range — highly abrasive minerals, very fragile products prone to attrition, or extremely fine and cohesive powders — need a closer look before assuming standard vacuum conveying is the right fit; abrasive materials in particular will accelerate wear on pipe bends and vacuum pump components.

What Determines Real Capacity

The headline capacity range (0.5–20 t/hr) isn't a fixed number for any given system. Actual throughput depends on:

• Pipe diameter — larger diameter moves more material per pass but needs more vacuum capacity to maintain velocity
• Conveying distance — longer runs mean more pressure drop, reducing achievable capacity at a given vacuum source size
• Material bulk density and particle size — denser, coarser materials behave differently in an air stream than light, fine powders
• Number of pickup points — sequencing multiple pickup points affects overall cycle time and effective throughput

What to Send With Your Enquiry

A complete pneumatic conveying spec starts with: material bulk density and particle size, moisture content, abrasiveness, required throughput (t/hr), number and location of pickup points, total conveying distance including elevation changes, and any hygiene or contamination-sensitivity requirements. Review the full Pneumatic Conveyor specification range before finalising a transfer method for your line.