Common Differences Between Dilute Phase Pressure Conveying and Dilute Phase Vacuum Conveying
Dilute phase pneumatic conveying is a method of moving non-abrasive, non-fragile materials that have a low bulk density. The materials move along an enclosed pipe, in slug form using small amounts of gas at a high velocity and low pressure. This article introduces the two most common types of dilute phase conveying – pressure and vacuum.
Why Choose Pressure Conveying
Our dilute phase pneumatic conveying systems use large amounts of low-pressure (<15 PSIG) to convey materials. In this method, a blower at the system’s start supplies a high volume of low-pressure air to the system, and material is fed into the conveying line through a rotary airlock valve. The system relies on the air stream’s velocity to pick up and entrain each particle, keeping the particles in suspension as they travel through the conveying line.
- Requires relatively little headroom.
- Simple to operate.
- Ideal for conveying materials from a single source to multiple destinations.
- Most often used with non-abrasive, non-fragile materials that have a light bulk density (typically less than 62 lb/ft3).
- Common examples are: flour, sugar, corn starch, plastic granules, sodium bicarbonate, hydrated lime, activated carbon, and zinc oxide.
Why Choose Vacuum Conveying
Our dilute phase pneumatic conveying systems use large amounts of vacuum high-velocity (3,500-9,000 ft/min) air to convey materials. This system is typically used to convey materials over short distances at low capacities.
- Suitable for conveying materials that tend to pack or compress under pressure such as wood shavings and certain other fibrous materials.
- Ideal for toxic materials that must not leak into the workplace air supply.
- Minimal headroom at the feedpoint required.
- Ideal for conveying material from multiple sources to a single destination.
Dilute phase pneumatic conveying offers two common system types, pressure and vacuum.
- Dilute phase pressure conveying is ideal for conveying materials from a single source to multiple destinations.
- Dilute phase vacuum conveying is ideal for conveying materials from multiples sources to a single destination.
- Dilute pressure and vacuum systems both require minimal headroom and are simple to operate.
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