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Dense Phase Conveying

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The other method is dilute phase conveying, and the main points of difference between the two are pressure, the solids’ properties, and the rate of conveying speed. Read More…

Dense Phase Conveying Dense phase conveying, also referred to as non-suspension flow, is one of the two main methods of pneumatic conveying.
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Leading Manufacturers

Belleville,NJ  |  800-822-8629

VAC-U-MAX is a premier custom pneumatic conveyors manufacturer of support equipment for conveying, batching and weighing materials. With our system your company’s product can move gently and quickly from point to point, with nothing in the way to impede the efficiency of its movement. Contact VAC-U-MAX today so they can find the perfect product for you.

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VAC-U-MAX $$$

Monroe,NC  |  704-246-0900

Spiroflow Systems has more than 40 years of experience in the design, manufacture & installation of bulk material handling equipment & systems. Product innovation & a thorough understanding of customers’ needs & objectives keep Spiroflow at the forefront of the industry.

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Spiroflow Systems, Inc. $$$

Bristol, PA  |  609-265-0101

Volkmann manufactures and distributes high quality, high-performance vacuum conveyors to transport food powders, chemicals, granules, pellets, tablets, and other small components without damage or abrasion. Volkmann vacuum conveyors are simple to install and operate. Working with negative pressure below atmospheric conditions, they help keep the production environment clean and prevent material escape into the environment.

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VOLKMANN, Inc. $$$

St. Paul,MN  |  651-484-2900

Dynamic Air custom designs and manufactures a complete line of pneumatic conveying systems for dry bulk granular materials. Dynamic Air offers 16 different pneumatic conveying concepts, utilizing both pressure and vacuum, for handling a wide variety of dry bulk solids to provide a conveying solution that fits the process perfectly. Each system has its own unique set of operating characteristics for pressure, conveying line velocity, efficiency and performance.

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Dynamic Air Inc. $$$

Big Lake,MN  |  763-262-1200

Since 1946, Whirl-Air-Flow has been a leader in design, fabrication and service. Our pneumatic conveyors transport powders and dry granulars to one or more destination points. Our products serve a range of industries and are able to move flowable material. We have our own testing facility and also we provide customers with field support and services.

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Whirl-Air-Flow Corporation $$$

Woodstock,ON  |  519-539-2054

Established in 1959, Pneuveyor specializes in pneumatic conveying of dry bulk solids for the plastic chemical, mineral, food and pharmaceutical industries. The in-house engineering staff, product testing and manufacturing facilities are designed for a single source supply, integrating equipment manufactured by the Pneuveyor group of industries and offering considerable savings and economic benefits to present and future customers.

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Pneuveyor Systems International, Ltd. $$$
placeholder image VAC-U-MAX Spiroflow Systems, Inc. VOLKMANN, Inc. Dynamic Air Inc. Whirl-Air-Flow Corporation Pneuveyor Systems International, Ltd.

In particular, dense phase conveying deals with the transportation of abrasive, friable or heavy materials such as sands, soils, minerals, food, paper scraps, and rocks.

Dense Phase Conveying Dense Phase Conveying - VAC-U-MAX

Dense phase conveyors push materials through at a fairly low velocity with a low air-to-material ratio. Often, dense phase conveyors use an air compressor to generate high pressure levels to move materials through the system at a general average of 275 feet per minute.

Typical industries that benefit from dilute phase conveyors include pharmaceutical, chemical and food processing, foundry, mining, plastics, and cement. Since dense phase conveying is ideal for moving large quantities of materials, it is often used in bulk material handling applications. However, dilute phase conveying may also be used if the materials being conveyed are both light-weight and non-abrasive.

A dense phase conveyor is an enclosed tubular conveyor that is operated using air pressure and is typically gravity or vacuum-loaded while discharging materials from the bottom; however, there are several different dense phase conveyor designs.

The bottom discharge design, in particular, lends itself so well to dense phase conveying because the materials being conveyed are so densely concentrated that they will naturally deposit at the bottom. Movement within gravity loaded dense phase conveyors is typically generated by a blower at the starting end of the conveyor, although vacuum loaded dense phase conveyors pull products through using a vacuum at the conveyor's destination. When the material being conveyed is fluidized, it deposits at the bottom much like a deposit of liquid and is dragged, or pushed, along the bottom.

In dense phase conveying, there are two different manners of flow: moving bed flow and plug flow. Moving bed flow occurs when the material is conveyed along the bottom of the conveyor pipeline, whereas plug flow occurs when the material is conveyed in units, called plugs or slugs, which are separated by air gaps rather than one fluid body.

Dense Phase Conveying Informational Video