Thomas Conveyor Company
Screw Conveyors Brochure
170Shaftless ScrewConveyors*Conveyors shown without cover for illustration purposes only. Please follow manufacturing safety guidelines when operating conveyors.SECTION XSHAFTLESS SCREW CONVEYORS SECTION XTypical Applications ....................................................................................................................171Feature- Function & Benefit .......................................................................................................171Size and Capacity.......................................................................................................................172Warning and Safety Reminder ...................................................................................................173171Shaftless ScrewConveyorsTypical Applications• RenderingPoultry Processing • Meat Processing • Fish Processing• Chicken Feathers • Whole Carcasses • Animal Waste • Fish/Animal Bones• Pulp & Paper, Gypsum Board, Particle Board• Lime Mud • Oversized Wood Chips • Hogged Bark • Shavings• Agriculture• Fertilizer • Corn Gluten • Sugar Beets/Cane Processing • Chopped Hay• Hospital Waste Processing, Recycle Plants• Shredded Cans • Bottles • Paper • Medical Disposables• Wine & Beverage Industries• Grape Skins • Stems • Pumice • Fruit Peels• Waste Water • Solid Waste Treatment• Sludge • Grit • Screenings • Solids Removal• Chemical & Heavy Industrial• Ash • Recycle Batteries • Carbon Black • Shredded TiresFEATURE FUNCTION BENEFITContinuous Flight Eliminate Hangers Reduces MaintenanceCosts3/4”-1” Flight Long Lasting Increases UptimeNo Tail Seals or Tail Bearings Use Blind End Plate Reduces Maintenance CostsCold Formed Flight High Brinell Longer LifeEliminate Buildup On Pipe Lower Maintenance/Operation CostsNo Center Pipe Required Can Handle Particle Sizes Up To 90% Of Spiral O.D. Increases ScrewAllows Higher Trough Loading Capacity(45%-95%)Side Inlet Feeding No Vertical Transition Necessary Lower Installation CostReduces Headroom172Size and CapacitySpecifications:Type of Steel Carbon Steel • High Brinell Carbon Steel • Stainless Steel Capacity Up to 17,000 CFHDiameter 6” to 30” (and Larger)Pitches Full & 2/3Trough CEMA StandardsOptions UHMW Liners, AR Liners, Rider Bars, Drive End SealsAdvantages Spanning longer distances without intermediate bearings. Transport sticky products and large lumps.NOM. A B C CFH* CFH* MAXDIA. Dia. Inside Pitch Full Pitch 2/3 Pitch RPM6 51/2 7 6 52 35 259 81/2 10 9 182 122 2510 91/2 11 10 261 174 2512 111/2 13 12 441 295 2514 131/2 15 14 730 489 2516 151/2 17 16 1030 690 2518 171/2 19 18 1524 1021 2520 191/2 21 20 2147 1438 2524 231/2 25 24 3401 2278 2530 291/2 31 30 6792 4528 2545% Trough Loading 95% Trough LoadingNOM. A B C CFH* CFH* MAXDIA. Dia. Inside Pitch Full Pitch 2/3 Pitch RPM6 51/2 7 6 108 73 259 81/2 10 9 385 258 2510 91/2 11 10 544 363 2512 111/2 13 12 932 625 2514 131/2 15 14 1542 1033 2516 151/2 17 16 2176 1458 2518 171/2 19 18 3218 2156 2520 191/2 21 20 4532 3038 2524 231/2 25 24 7180 4810 2530 291/2 31 30 14425 9617 25*CFH = Cubic Feet per hour. -**ALL DIMENSIONS SHOWN IN INCHES.NOM WIDTH CFH* CFH* MAXDIA. D Full Pitch 2/3 Pitch RPM6 28 261 175 159 40 922 618 1510 44 1292 862 1512 52 2238 1500 1514 60 3700 2479 1516 68 5222 3500 1518 76 7722 5173 1520 84 10880 7290 1524 100 17231 11545 1530 124 34005 22669 15Quad Screw Feeder 95% Trough LoadingDWIDTH20’-0” MaxLength(ConsultFactory ForLongerLengths)*CFH = Cubic Feet per hour. -**ALL DIMENSIONS SHOWN IN INCHES.BA AC173173SafetyWARNING AND SAFETY REMINDERS FOR SCREW , DRAG , AND BUCKET ELEVATOR CONVEYORSAPPROVED FOR DISTRIBUTION BY THE SCREW CONVEYOR SECTION OF THECONVEYOR EQUIPMENT MANUFACTURERS ASSOCIATION (CEMA)It is the responsibility of the contractor,installer, owner and user to install, maintainand operate the conveyor, components and,conveyor assemblies in such a manner as tocomply with the Williams-Steiger OccupationalSafety and Health Act and with all state andlocal laws and ordinances and the AmericanNational Standards Institute (ANSI) B20.1Safety Code.In order to avoid an unsafe or hazardouscondition, the assemblies or parts must beinstalled and operated in accordance with thefollowing minimum provisions.1. Conveyors shall not be operated unlessall covers and/or guards for the conveyorand drive unit are in place. If the conveyoris to be opened for inspection cleaning,maintenance or observation, the electricpower to the motor driving the conveyormust be LOCKED OUT in such a mannerthat the conveyor cannot be restarted byanyone; however remote from the area,until conveyor cover or guards and driveguards have been properly replaced.2. If the conveyor must have an open hous-ing as a condition of its use and applica-tion, the entire conveyor is then to beguarded by a railing or fence in accordancewith ANSI standard B20.1.(Request currentedition and addenda)3. Feed openings for shovel, front loadersor other manual or mechanical equipmentshall be constructed in such a way that theconveyor opening is covered by a grating. Ifthe nature of the material is such that agrating cannot be used, then the exposedsection of the conveyor is to be guarded bya railing or fence and there shall be a warn-ing sign posted.4. Do not attempt any maintenance orrepairs of the conveyor until power hasbeen LOCKED OUT.5. Always operate conveyor in accordancewith these instructions and those containedon the caution labels affixed to the equip-ment.6. Do not place hands, feet, or any part ofyour body, in the conveyor.7. Never walk on conveyor covers, gratingor guards.8. Do not use conveyor for any purposeother than that for which it was intended.9. Do not poke or prod material into theconveyor with a bar or stick insertedthrough the openings.10. Keep area around conveyor drive andcontrol station free of debris and obstacles.11. Eliminate all sources of stored energy(materials or devices that could cause con-veyor components to move without powerapplied) before opening the conveyor12. Do not attempt to clear a jammed con-veyor until power has been LOCKED OUT.13. Do not attempt field modification of con-veyor or components.14. Conveyors are not normally manufac-tured or designed to handle materials thatare hazardous to personnel. These materi-als which are hazardous include those thatare explosive, flammable, toxic or otherwisedangerous to personnel. Conveyors may bedesigned to handle these materials.Conveyors are not manufactured ordesigned to comply with local, state or fed-eral codes for unfired pressure vessels. Ifhazardous materials are to be conveyed orif the conveyor is to be subjected to internalor external pressure, manufacturer shouldbe consulted prior to any modifications.CEMA insists that disconnecting and lock-ing out the power to the motor driving the unitprovides the only real protection against injury.Secondary safety devices are available; how-ever, the decision as to their need and thetype required must be made by the owner-assembler as we have no information regard-ing plant wiring, plant environment, the inter-locking of the screw conveyor with otherequipment, extent of plant automation, etc.Other devices should not be used as a substi-tute for locking out the power prior to removingguards or covers. We caution that use of thesecondary devices may cause employees todevelop a false sense of security and fail tolock out power before removing covers orguards. This could result in a serious injuryshould the secondary device fail or malfunc-tion.There are many kinds of electrical devicesfor interlocking of conveyors and conveyor sys-tems such that if one conveyor in a system orprocess is stopped other equipment feeding it,or following it can also be automaticallystopped.Electrical controls, machinery guards, rail-ings, walkways, arrangement of installation,training of personnel, etc., are necessaryingredients for a safe working place. It is theresponsibility of the contractor, installer, ownerand user to supplement the materials andservices furnished with these necessary itemsto make the conveyor installation comply withthe law and accepted standards.Conveyor inlet and discharge openings aredesigned to connect to other equipment ormachinery so that the flow of material into andout of the conveyor is completely enclosed.One or more warning labels should be visi-ble on conveyor housings, conveyor coversand elevator housings. If the labels attached tothe equipment become illegible, please orderreplacement warning labels from the OEM orCEMA.The Conveyor Equipment ManufacturersAssociation (CEMA) has produced an audio-visual presentation entitled “Safe Operation ofScrew Conveyors, Drag Conveyors, andBucket Elevators.” CEMA encourages acquisi-tion and use of this source of safety informa-tion to supplement your safety program.NOTICE: This document is provided by CEMA as a service to the industry in the interest of promoting safety. It is advisory only and it is not a substitute for a thoroughsafety program. Users should consult with qualified engineers and other safety professionals. CEMA makes no representations or warranties, either expressed orimplied, and the users of this document assume full responsibility for the safe design and operation of equipment.PROMINENTLY DISPLAYTHESE SAFETY LABELSONINSTALLED EQUIPMENT Index Material Handling Products Section I Design Table 1-1 Table 1-2 Selection of Conveyor Size and Speed Capacity Factors Capacity Table Lump Size Limitations Component Selection Bearing Selection Horsepower Requirements Horsepower Factor Tables Horsepower Torsional Ratings of Components Conveyor Screw Deflection Inclined and Screw Feeders Design and Layout Section II Enclosures Hand Conveyors Conveyor Screw Rotation Layout Bolt Patterns Bolt Requirements Pipe Sizes, Dimensions & Weights Typical Drive Arrangement Sample HP Work Sheet Components - Section III Component Selection Conveyor Screws CEMA Standards Conveyor Screws Conveyor Screws Helicoid Conveyor Screws (Sectional) Conveyor Screws (Ribbon) Conveyor Screws Conveyor Screw (Components) Shaft No. 1 Drive Shaft Shafts End Shaft Hangers Screw Conveyor Hanger Bearing Selection Application Hanger Bearings Trough Ends Shaft Seals End Bearings Thrust Bearings Conveyor Trough Standard Conveyor Trough Tubular Trough Flared Trough Saddles - Feet Trough End Flanges Discharges and Gates Discharge Spouts Discharge Gates Trough Covers Trough Accessories Feeder Shrouds Conveyor Shrouds Special Features Section IV Covers Trough Ends Trough Conveyor Screws Discharges Discharges and Inlets Installation & Maintenance Installation & Maintenance Section V Warning & Safety Reminders Bucket Elevators Section VI Elevator Types Selection Material Table 100 & 200 Series Chain Type 100 & 200 Series Belt Type 700 & 800 Series Chain Type 700 & 800 Series Belt Type 1000 Series Super Capacity 1100 Series Super Capacity 1400 Series Cement Mill Diagram Bucket Elevator Dimensions Safety Buckets Bucket Punching (Belt) Troubleshooting Guide - Belt Troubleshooting Guide - Chain Bucket Elevator Data Sheet Screw Conveyor Data Sheet Vertical Screw Data Sheet Shaftless Screw Conveyors -Section X Size and Capacity Safety Modular Plastic Screw Section IX Warning & Safety Reminder Modular Plastic Screw Conveyors - Design Data Technical & Design Data Vertical Screw Elevator Section VIII Screw Elevators Standard Screw Elevators Super Screw Elevator Warning & Safety Reminder Drag Conveyors Section VII Round Bottom Drag Conveyor Flat Bottom Drag Conveyors L-Path Drag Conveyor Safety
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