Pneumatic — dilute phase
Dilute phase
pneumatic conveying.
Product carried in suspension on a fast air stream — the simplest pneumatic system, and the right one for robust powders.
In brief
Dilute phase (lean phase) conveying suspends powder in a high-volume, low-pressure air stream, fed by a rotary valve and driven by a blower. It is the simplest and most economical pneumatic method, suited to robust, non-abrasive powders where some particle impact is acceptable.
In detail
How it works.
Air velocities of 15–30 m/s keep every particle airborne from pickup to receiver. For flours, sugars, salts and granules that shrug off impact, dilute phase delivers high rates with the least equipment: a blower, a rotary valve, pipework and a filter receiver.
Where it goes wrong is misapplication — friable agglomerates arrive as fines, and abrasive powders machine the bends. TLG's selection starts from the material data sheet, and dense phase is recommended where the powder demands it.
- Velocity
- 15–30 m/s, product in full suspension
- Feed
- Rotary valve into a blow-through adaptor
- Drive
- PD blower package, pressure or vacuum
- Best for
- Robust powders · high rates · simple routes
Common questions
Frequently asked questions.
- What is lean phase conveying?
- Lean phase is another name for dilute phase — powder carried in suspension on a high-volume air stream at relatively low pressure. The terms are interchangeable; both contrast with dense phase, where material moves as slugs at low velocity.
Related
Related pages.
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