ANSI CEMA 350 2009

ANSI CEMA 350 2009

ANSI CEMA 350 2009

ANSI CEMA 350 2009 – Screw Conveyors for Bulk Materials Conveyor Equipment Manufacturers Association / 01-Apr-2009 / 170 pages

INCLUDES CEMA 300-2009. A book ANSI CEMA 350 2009 acceptable engineering and application practice as compiled by engineers of leading screw conveyor manufacturing companies based on the experience of many years. The ANSI CEMA 350 2009 book is profusely illustrated and contains much tabular data on conveyor selection and handling characteristics of the materials ordinarily handled in screw conveyors. Attention is given to horizontal, inclined, vertical and a number of special types of screw conveyors, both for straight handling and for processing.

ANSI CEMA 350 2009
A Revision of ANSI / CEMA 350-2003
(Approved: April 1, 2009)
CEMA BOOK NO. 350
Third Edition
SCREW CONVEYORS
for Bulk Materials

Contents of ANSI CEMA 350 2009
Screw Conveyor History and General Application 1
Screw conveyor history. Discussion of application of screw conveyors. Data needed in preparation of screw conveyor design. Illustrations of screw conveyor installations.
Bulk Material Characteristics, Material Code, Conveyor Size and Speed,
Component Groups 9
Discussion and codification of bulk material characteristics. Tables of bulk materials. Screw
conveyor sizes, speeds and capacities. Lump size limitations. Enumeration and description of
screw conveyor components. Component specifications for normal, heavy and extra heavy
service.
Horsepower Requirements, Torsional Ratings for Conveyor Screws, End Thrust, Typical Horizontal Screw Conveyor Problem 37
Formula for horsepowers of horizontal screw conveyors. Torsional rating of conveyor screws and all screw parts. Horsepower limitation charts for conveyor screws based on bolted couplings. Screw conveyor end thrust. Deflections of conveyor screws. Detailed solution of typical horizontal screw conveyor problem.
Screw Conveyor Layout, Screw Conveyor Components 53
Instructions for layout of screw conveyors with dimensional data. Discharge arrangements
described and illustrated. Detail data on screw conveyor components such as screws, flighting,
modifications to flighting, troughs, discharge spouts and gates, trough ends, trough end bearings,
trough end seals, trough covers, hangers and hanger bearings, shafting, bolts and trough
supports.
Materials of Construction, Classes of Enclosure, Weld Finish, Special Features
and Modifications, Installation, Operation, Maintenance, Expansion 75
Discussion of materials of construction. Codification of classes of enclosure. Description
and codification of weld finishes. Description and illustration of special features of conveyor
components for various purposes. Directions for installing screw conveyors, operating them
and preventive maintenance. Calculation of the expansion of screw conveyors handling hot
materials.
Screw Feeders, Single and Multiple 105
Description of single and multiple screw feeders, their uses and limitations, speeds, capacities,
arrangements with extension conveyors, horsepowers required. Bin bottom type multiple screw
feeders. Also included is guidance on Variable Frequency Drive (VFD) selection for screw
feeders.
Inclined and Vertical Screw Conveyors 118
Discussion of capacity versus angle of incline and other factors concerning inclined screw
conveyors, including horsepower. Description of vertical screw conveyors, their speeds,
capacities, components and horsepowers required.
Screw Conveyor Drives, Drive Efficiencies and Drive Service Factors 129
Discussion and illustration of horizontal, inclined and vertical screw conveyor drives. Table of
drive efficiencies. Service factor references.
Derivation of Horsepower Formula for Horizontal Screw Conveyors, Individual
Torsional Ratings of Conveyor Screw Parts, Metric Practice in Screw
Conveyor Calculations 139

File Type Download : PDF File, ANSI CEMA 350 2009



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