Pneumatic Conveyors/

Dense Phase Conveying

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

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J.D.B. Dense Flow Inc.
Palm Harbor, FL
800-822-3569
For your complicated conveying issues, let J.D.B. Dense Flow Inc. find the perfect solution for you. Their experience is now being applied to designing and manufacturing some of the most cost effective, efficient and high quality systems available today. For dense phase conveying to get started on your next project.
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Vac-U-Max
Belleville, NJ
800-822-8629
VAC-U-MAX provides a wide variety of technical services with their quality products, such as dense phase conveying. After determining the design and equipment specifications, customer's materials can be tested for flow characteristics and other qualities under simulated conditions. Complete installation, startup, operating training and follow-up support are also offered.
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Whirl-Air-Flow Corporation
Big Lake, MN
800-373-3461
Whirl-Air-Flow stands out in the industry as a comprehensive system supplier. Their vast experience gives customers a clear opportunity to profit. From your initial inquiry on dense phase conveying to successful installation and start-up of your system, you will discover the company to be an able and agile partner with the experience, resources and expertise you need.
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Smoot, division of Magnum Systems
Kansas City, KS
800-748-7000
Established in 1960, Smoot, a division of Magnum Systems, has been an industry leader in designing and manufacturing dense phase conveying systems, and their needed components. Their extensive line, years of experience and drive for excellence allow them to offer combined process solutions that no other company can. Be sure to contact them today to get started!
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Nol-Tec Systems, Inc.
Lino Lakes, MN
651-780-8600
The customers that choose Nol-Tec for system solutions become long-term partners as they work together to achieve their goals of becoming more efficient, productive and competitive. This service oriented company works with companies of all sizes in a range of industries. Call them today for help finding the perfect dense phase conveying parts for all your needs.
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Aerocon
Belleville, NJ
800-405-2376
The experienced workers at Aerocon will consult with the customer to determine the system design and equipment specifications, the customer can have materials tested for flow characteristics and other qualities under simulated control conditions. They will work hard to create the perfect solution to adhere to all your dense phase conveying requirements.
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Industry Information

Dense Phase Conveying

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 through 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.