Dense Phase Pneumatic Conveying

Pneumatic Conveying Systems

Low velocity, high pressure and high solids loading – minimal attrition, dust and streamers.

Overview

Conveying mode: Positive-pressure dense phase
Characteristics: Low velocity, high pressure, high solids loading
Suitable materials: Fragile, high-value materials
Air control: ACU air control unit
Scope: Design, supply, installation and commissioning

Dense phase conveying moves material at low velocity, high pressure and high solids loading, with minimal attrition, dust and streamers – ideal for fragile, high-value materials. We define the solution from your material properties, conveying distance and capacity, and provide design, supply, installation and commissioning.

Dense or dilute phase?

Criterion	Dense phase	Dilute phase
Velocity	Low	High
Pressure	High	Low
Solids loading	High	Low
Attrition	Minimal	For materials that tolerate attrition
Main advantage	Less dust and fewer streamers	Simple and economical system
Typical use	Fragile, high-value materials	Materials that tolerate attrition

For attrition-tolerant materials where a simple, economical system matters most, see dilute phase pneumatic conveying.

System components

Feeding in

Big-bag stations, sack tip stations, container discharge units

Metering

Rotary valves for pellets or powders

Piping & diverting

Conveying pipes, diverter valves, knife gate valves

Air control

Air control unit (ACU) adjusts valve opening and air flow from pipeline pressure

Storage

Storage silos, blending silos and other process silos

Dust collection

Silo-top filters and bag filters

How we design

Select the conveying mode for the material, distance and capacity

Determine the key conveying parameters by testing the material

Test attrition in dilute phase, dense phase and dune flow as the basis for design

Optimize gas velocity with correctly placed pipeline step-ups

Reference applications of the same equipment series

Material	Capacity	Conveying distance
PMMA	15 t/h	Up to 500 m
ABS/SAN	6 t/h	Up to 406 m
ABS/SAN	30 t/h	Up to 335 m
ABS/SAN	35 t/h	Up to 134 m
ABS	30 t/h	Horizontal 150 m, vertical 26 m
PET chips	30 t/h	Up to 105 m

Reference applications of the same equipment series. Distance is the longest run, or the horizontal and vertical distance. Each solution is confirmed by material testing, conveying distance and capacity.

FAQ

What is dense phase pneumatic conveying?

It is a way of conveying powders and pellets with gas through a closed pipeline, characterized by low velocity, high pressure and high solids loading.

Which materials suit dense phase conveying?

Fragile, high-value materials. The final solution is based on material testing, conveying distance and capacity.

What do you need for a quotation?

Tell us the material, capacity and conveying distance, and our engineers will propose a conveying solution and quotation.

Planning a new line or an upgrade?

Tell us your material, capacity and distance – our engineers will reply with a conveying concept and quotation.

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