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- Particle Reduction, Rotary Airlocks, Particle Size
Enlargement, Sizing and Separation
Prater Industries, Inc. offer a full line of Milling, Sifting,
and Compaction Equipment and Airlocks too. With over 75 years of experience in
the Bulk Materials Industries, Prater offers experience for your applications.
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Rotary Airlock Feeders
 
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Prater airlocks can be configured for most application requirements.
By manufacturing airlocks with larger pockets (up to 50% more volume)
our airlocks can run at lower speed. This minimizes air leakage,
provides the benefit of longer life and higher return on investment.
Knowing that temperature plays a significant role in the operation of
rotary airlock feeders, ALL Prater airlocks are carefully machined for
actual operating temperature at no additional cost.
Prater airlocks’ most attractive feature is the self-adjusting packing
gland. This exclusive design significantly reduces maintenance by
eliminating the need to manually adjust the packing seals as they
wear.
Heavy Duty, Dust Collector, Ceramic Lined and Quick-Take-Apart
Construction Available. |
Feeding
Application Data Sheet
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Crushers, Shredders, Cake/Flake Breakers
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Crushers are used for fast primary crushing of material in large chunks such
as large pellets, poultry carcasses, corn cobs and similar products. Prater
offers single and double roll models, both built to withstand the stress of
industrial crushing. Prater shredders are used to break up large sheets or
cut-offs of styrofoam scrap, gypsum board, plywood wall paneling, and other
similar products. The rugged and dependable Prater Cake/Flake breaker
reduces agglomerations or compacted materials into small particle sizes for
processing. It is designed for the dry and liquid material processing
industries. A variety of options are available with many models and sizes
offered. |
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Mega-Mill Hammermills
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This
mill’s unique design provides nearly effortless access to all its
internal parts for maintenance/cleaning, significant reductions on power
needs, and provides a more uniformly ground product with greater
efficiencies than other hammermills. Based on the Mega Mill's increased
product handling capacities, at times, one machine may equal the output of
two conventional units |
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Fine Grinding and Comminution Mills
 
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Prater
Fine Grinders (M Series Mills) are designed to grind dry, free-flowing
material as fine as 200 mesh (75 microns) with very tight distribution of
particle size. The highly efficient design allows for ease of access to
all internals and is well suited for heat sensitive materials such as
resins and sugar. Six sizes are available from the 3 HP M-19 bench scale
lab mill to the 250 HP M-101. |
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Classifier Mills
 
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The
Prater Classifier Mill (CLM) offers the combination of two-stage closed
circuit grinding with internal air classification, all in one unit. The
unique capabilities of the CLM Mill out perform single-stage mills when
handling difficult to grind products and those products requiring a narrow
particle distribution. The large access door on these mills allows for
quick inspection and/or cleaning of the main rotor as well as the
classifier rotor. |
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Rota-Sieve Centrifugal Sifters
 
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Stainless
steel Prater Rota-Sieve yields at least six times the throughput capacity of a
conventional screen with comparable screen area. Used for centrifugal scalping
or sifting of powders and granular materials. Operation is quiet, free of dust
and vibration. Quick and easy maintenance. Optional equipment includes the
Patented Rota-Trap, a stainless steel pre-scalping chamber that removes tramp
materials and protects the sieve cloth. |
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Air Classifiers
 
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All
Prater Air Classifiers separate particles based on the opposing
principles of centrifugal force and aerodynamic drag force. As product
enters the primary air inlet, individual particles are subjected to
aerodynamic drag forces by the conveying air. This drag force varies
with the size and density of the individual particles. As particles
spiral toward the classifier rotor, one of two things occur: 1) drag
force exceeds the centrifugal force exerted by the rotor and particles
pass through the machine as fines; or 2) centrifugal force overcomes
the drag force, causing particles to accelerate away from the rotor,
where a cyclonic chamber collects the coarse particles and discharges
them. Cut-point is determined when the forces are equal, in which case
particles have a 50/50 chance of passing as fines. Cut-point is
variable and can be controlled by adjusting the rotor speed. A
secondary air inlet introduces a controllable amount of air that moves
upward into the classification zone, increasing the residence time of
agglomerated particles |
Screening
Application Data Questionnaire
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Agglomeration,
Compaction, Granulation and Briquetting Equipment and Systems
 
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This
equipment utilizes a unique design to densify materials by applying
pressure or by combining pressure with heat, binding agents or
moisture. Prater’s compaction capabilities are used to improve flow
ability, solubility, dust control, and waste by-products recovery. In
addition, reduces storage requirements as well as substantially
lowering transportation and product handling costs. Prater Compactors
& Briquetters, available in either heavy or severe-duty versions
are versatile and energy-efficient systems for compacting, densifying
or briquetting your material. |
Prater's website...http://www.praterindustries.com/home.php
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