cema screw conveyors
Screw Conveyors are one of the oldest and simplest devices used
for the movement of bulk materials. Our screw conveyor systems are
compact and easily adapted to congested locations. They can be
used as a mixer or agitator, mixing and blending dry or wet
ingredients. Screw conveyors are available in a wide variety of
materials resistant to corrosion, abrasion, and heat. Horizontal,
inclined, or vertical conveyors are also available.
-Inlet
is always control fed
-Trough loading of
15, 30, and 45%
-Volumetric conveying
device
Multi Screw Conveyors
are used as screw feeders and may consist of twin, triple, or
quadruple screws, side by side. They provide a means of moving a
wide variety of material from bins or hoppers at a constant and
controlled rate of flow.
The inlet is usually flooded with
material (100% loaded)
Volumetric metering device
Ribbon Flight Conveyors consist of sectional flights,
butt-welded to form a continuous helix. The flights are secured to
the center pipe by supporting legs.
Ribbon flight conveyors are used to convey
tacky, gummy, or viscous substances, or in applications where the
material tends to adhere to the flighting and pipe.
Paddle
Screw Conveyors are used in applications where material needs to
be mixed before reaching its deStination. Adjustable paddles
provide complete mixing action and controlled material flow.
Conveying action can be controlled by adjuSting the angle of the
paddles.
Screw Feeders move a wide variety of material from
bins or hoppers at a constant and controlled rate of flow. One or
more tapered or variable pitch screws convey the material at the
required rate. Screw feeders are available in a variety of types
to suit specific materials and applications.
-Inlet
is always flood loaded
-100% trough
loading at inlet
-Volumetric metering
device
Shaftless Screw Conveyor
systems are used in applications where particle sizes are large.
They do not require hanger bearings because there is no center
pipe. Typical applications include bottling plants, rendering,
recycling plants, and wastewater treatment.
Transfer Sticky
or viscous bulk materials from one location to another
Conveyor
or feeder design
Volumetric conveying or feeding device
The DOSERAY is used to separate, classify,
and dewater grit from wastewater and grit slurries.
-Heavy-duty
design and construction
-Large settling
basin separates solids from liquids
-Typically
used in municipal wastewater applications
-High-torque
drive to handle upset conditions
-Support
legs for elevation requirements
Heat
Transfer Screw Conveyor systems cool or heat bulk
materials during conveyance. These units feature special tubular
jacketed housings.
-Heat transfer
mediums include water, glycol, steam, and hot oil
-Indirect heat transfer device
-Available in hollow-flight design
Pressurized
Screw Conveyors use tubular or pipe housing with
ANSI flanges, or a reinforced U-trough. This type of conveyor is
used for conveying various types of chemicals, and in
fire-suppression applications.
screw conveyor PDF BROCHURE
The five steps are:
Establish characteriStics of the bulk material to be conveyed.
Determine conveyor size and speed based on capacity.
Calculate horsepower requirements.
Verify
torque rating of components.
Select conveyor components.
Advantages of UsIng Screw Conveyors
Ideal for conveying dry to semi-fluid bulk materials – free
flowing to sluggish
Cost-effective when compared to other
conveying devices such as belt, pneumatic or aeromechanical
Efficiently distributes bulk
materials to various locations using multiple inlet and discharge
points
Totally enclosed for dusty, corrosive or hazardous
environments
STANDART (CEMA)CONVEYORS
Screw conveyors move materials either horizontally, on an incline or vertically. They are used to feed, distribute, collect or mix and can be equipped to either heat or cool while performing this transfer. With the proper cover and gasketing, they are easily made dust or weather tight and rodent proof.
Screw Conveyor Product Range
Extreme Versatility: Several options and parts
combinations are available for conveying a wide variety of materials
in many different markets.
Mixing: The normal rotation of the
screw when conveying material also lifts and tumbles the product,
which makes a screw conveyor an efficient mixer.
Simultaneous
Conveyance in Two Directions: Combining right-hand and left-hand
flights produces bidirectional conveyance.
Ready Reversibility: No
need for soft-start units.
High-temperature Materials:
Properly applied screw conveyors can handle product at temperatures
above 1000 degree F.
Abrasive Materials: Many
special materials and hard-coating options are available to extend
screw life in extremely abrasive applications.
Flood
Loading Capability: Screw feeders are very efficient and
reliable in regulating feed to downstream equipment. The screw
diameter, pitch combination, pipe size, and flight configuration can
be customized to solve specific bin unloading requirements.
Total
Enclosure Screw Conveyor Systems:
Completely enclosed systems
protect the environment from the product being handled (dust-tight)
and/or protect the conveyed material from the environment.
Large Lump Size: Within industry guidelines,
conveyance of pieces up to 7-1/2” is possible.
Multiple Inlets or
Discharges: Intermediate inlets and/or discharges are readily added.
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