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.
Fast Facts:
- 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.
Fast Facts:
- 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.
Key Takeaways
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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