KWS Manufacturing

Shaftless Screw Conveyors

Bulk materials discharged from centrifuges, filter presses or mixers can easily be metered or conveyed using a shaftless screw conveyor. Our shaftless design provides a non-clogging conveying surface that allows difficult-to-convey materials to become easy-to-convey. The perfect solution for handling bulk materials with high moisture content is the KWS Shaftless Screw Conveyor.

Engineering Guide Industry Solutions

Shaftless Screw Conveyor Located Under Centrifuge

Shaftless Screw Conveyor - KWS Manufacturing

Advantages of Using Shaftless Screw Conveyors

  • Ideal for handling sticky and sluggish bulk materials
  • Improved conveying efficiency when compared to other types of conveyors
  • Allows greater flexibility for plant layout due to configurations available
  • Internal bearings are eliminated
Shaftless Screw Conveyor Benefits

KWS Shaftless Screw Conveyors are successfully used throughout the chemical, food, minerals processing and wastewater treatment industries for conveying everything from catalysts to dewatered biosolids.

KWS developed the industry standards for shaftless screw conveyors and continues to create new and improved design standards. Our high strength alloy spirals are the hardest, strongest and toughest in the industry.

Choosing a Screw Conveyor

Exclusive One-Piece Drive Shaft and Flanged Connection to Spiral

Shaftless Screw Conveyor - KWS Manufacturing

Available Features / Options

  • Wide Range Of Construction Materials – Carbon Steel, Stainless Steel and Abrasion-Resistant Alloys
  • High Strength Alloy Spirals With Hardness Up To 350 BHN
  • Low Friction Liner Materials – UHMW and Xylethon
  • Unique One-Piece Drive Shaft Design
Design Worksheet
  • Horizontal and Inclined Screw Conveyors
  • Vertical Shaftless Screw Conveyors
  • Washer / Compactors for Screenings

Available Configurations

KWS is an ISO 9001-2015 certified manufacturer. Every component and assembly is manufactured in the USA by highly skilled craftsmen. All KWS welders are certified in accordance with American Welding Society (AWS) Codes. KWS Shaftless Screw Conveyors are manufactured to rigid quality standards.


Problem Solvers for Shaftless Screw Conveyors

Filter Problem Solvers

Shaftless Screw Conveyor to Convey Hydrocarbon Condensate for Reterro, Inc. in Livermore, CA

Shaftless Screw Conveyor to Convey Hydrocarbon Condensate for Reterro, Inc. in Livermore, CA - KWS Manufacturing

Since the EDT system was already in use at the site in Livermore, CA, Reterro needed a quick and robust…

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Shaftless Screw Conveyor for Miners Ranch Water Treatment Plant in Oroville, CA

Shaftless Screw Conveyor for Miners Ranch Water Treatment Plant in Oroville, CA - KWS Manufacturing

KWS Environmental designed a shaftless screw conveyor with the KWS 350 spiral made for handling the…

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Grit Conveyor System for the Nacogdoches WWTP in Nacogdoches, TX

Grit Conveyor System for the Nacogdoches WWTP in Nacogdoches, TX - KWS Manufacturing

KWS Environmental provided shaftless screw conveyors that were designed for the difficult application and…

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Biosolids Load Out System for Moffat Water Treatment Plant in Lakewood, CO

Biosolids Load Out System for Moffat Water Treatment Plant in Lakewood, CO - KWS Manufacturing

KWS Environmental was selected to design and provide a load out system with multiple conveyors to load…

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Shaftless Screw Conveyor Replaces Belt Conveyor for Biosolids Load Out System at Floyd Branch…

Shaftless Screw Conveyor Replaces Belt Conveyor for Biosolids Load Out System at Floyd Branch WWTP in Richardson, TX - KWS Manufacturing

KWS Environmental designed, manufactured and supplied a shaftless screw conveyor for the load out system…

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Shaftless Screw Conveyor for Conveying Wood Products at Georgia Pacific in Fordyce, AR

Shaftless Screw Conveyor for Conveying Wood Products at Georgia Pacific in Fordyce, AR - KWS Manufacturing

KWS-340 spirals are the strongest and toughest on the market and are designed to outlast all other…

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Biosolids Conveyor for Upper Moreland-Hatboro JSA Treatment Plant in Upper Moreland Township,…

Biosolids Conveyor for Upper Moreland-Hatboro JSA Treatment Plant in Upper Moreland Township, PA - KWS Manufacturing

KWS Environmental designed, manufactured, supplied and commissioned a shaftless screw conveyor along with…

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Stainless Steel Shaftless Classifier

Stainless Steel Shaftless Classifier - KWS Manufacturing

Stainless Steel Shaftless Classifier for Conveying a Water-based Slurry.

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Stainless Steel Shaftless Screw Conveyors for Filter Press Cake

Stainless Steel Shaftless Screw Conveyors for Filter Press Cake - KWS Manufacturing

The KWS shaftless screw conveyors are excellent for conveying wet, sticky filter cake.

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Vertical Shaftless Conveyor System for Elevating Biosolids at the Town of Simsbury, CT

Vertical Shaftless Conveyor System for Elevating Biosolids at the Town of Simsbury, CT - KWS Manufacturing

KWS provided a very unique solution for the application. KWS Shaftless Conveyors are uniquely designed to…

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Vertical Shaftless Screw Conveyor with Pivoting Load-Out Conveyor for Biosolids for Deltona…

Vertical Shaftless Screw Conveyor with Pivoting Load-Out Conveyor for Biosolids for Deltona WWTP in Florida - KWS Manufacturing

KWS designed and delivered a shaftless vertical screw conveyor, an automatic pivoting shaftless screw…

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Shafted and Shaftless Screw Conveyors for Handling Residuals at Amherstburg WWTP in Ontario,…

Shafted and Shaftless Screw Conveyors for Handling Residuals at Amherstburg WWTP in Ontario, Canada - KWS Manufacturing

KWS Environmental designed and manufactured both shaftless and shafted screw conveyors for all types of…

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Shafted Screw Conveyors for Conveying Dried Sludge at Jones Island WWTP in Milwaukee, WI

Shafted Screw Conveyors for Conveying Dried Sludge at Jones Island WWTP in Milwaukee, WI - KWS Manufacturing

The KWS Environmental screw conveyors were designed with a number of special features to meet the unique…

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Unique Pivoting Shaftless Screw Conveyor for the East Vincent Municipal Authority WWTP (Spring…

Unique Pivoting Shaftless Screw Conveyor for the East Vincent Municipal Authority WWTP (Spring City, PA) Biosolids Loadout - KWS Manufacturing

KWS provided custom designed shaftless conveyors and slide gate that met the customers need for a…

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Shaftless Screw Conveyors for Loading Biosolids to Dumpsters at Pataskala WRF in Pataskala, OH

Shaftless Screw Conveyors for Loading Biosolids to Dumpsters at Pataskala WRF in Pataskala, OH - KWS Manufacturing

KWS Environmental provided a complete biosolids load out system including shaftless screw conveyors,…

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Shaftless Screw Conveyor Loadout System for Carrot Pomace for Bolthouse Farms

Shaftless Screw Conveyor Loadout System for Carrot Pomace for Bolthouse Farms - KWS Manufacturing

The KWS Floating Torque Arm Trough End was a perfect solution for the drive arrangement and the overall…

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Shaftless Screw Conveyors and Thermal Processor for Elevated Temperature Gasification Project

Shaftless Screw Conveyors and Thermal Processor for Elevated Temperature Gasification Project - KWS Manufacturing

KWS utilized temperature-resistant alloys to maintain high yield strengths and corrosion resistance at…

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Shaftless Screw Conveyors for Dewatered Oilfield Solids

Shaftless Screw Conveyors for Dewatered Oilfield Solids - KWS Manufacturing

KWS designed the shaftless screw conveyors with a wide inlet opening to prevent sticky sludge material…

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Shaftless Screw Conveyor System for Conveying Biosolids in Florida Keys

Shaftless Screw Conveyor System for Conveying Biosolids in Florida Keys - KWS Manufacturing

The KWS screw conveyor was supplied as dust-tight with fully enclosed cover and shaft seals to contain…

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Shaftless Vertical Screw Conveyor System for Transferring Class B Biosolids of Pembroke Pines,…

Shaftless Vertical Screw Conveyor System for Transferring Class B Biosolids of Pembroke Pines, FL WWTP - KWS Manufacturing

KWS was excited to be selected by BCR as a partner responsible for the design, manufacture and…

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Sludge Handling System for Dewatered Biosolids and Composting Additives in Ft. McMurray, Canada

Sludge Handling System for Dewatered Biosolids and Composting Additives in Ft. McMurray, Canada - KWS Manufacturing

The City of Fort McMurray completed the construction of a new sewage treatment plant designed to be…

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Reversing Shaftless Screw Conveyor for Biosolids Load Out at Abington Regional WWTP in…

Reversing Shaftless Screw Conveyor for Biosolids Load Out at Abington Regional WWTP in Chinchilla, PA - KWS Manufacturing

KWS designed the shaftless screw conveyor to meet the specific space constraints associated with the…

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Horizontal to Incline Shaftless Screw Conveyor System for Pandora Water Treatment Facility

Horizontal to Incline Shaftless Screw Conveyor System for Pandora Water Treatment Facility - KWS Manufacturing

KWS designed the shaftless screw conveyors for maximum capacity within a minimal footprint.

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Inclined Shaftless Conveyor for Conveying and Elevating Industrial Wastewater Sludge

Inclined Shaftless Conveyor for Conveying and Elevating Industrial Wastewater Sludge - KWS Manufacturing

KWS engineers designed a special 9-inch diameter shaftless screw conveyer about 27-feet long on a 15…

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Inclined Shaftless Screw Conveyor for Transferring Biosolids at Devens WWTF in Devens, MA

Inclined Shaftless Screw Conveyor for Transferring Biosolids at Devens WWTF in Devens, MA - KWS Manufacturing

KWS Environmental designed the shaftless screw conveyor to meet the specific space constraints associated…

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Inclined Sludge Load Out System for Louisville Wastewater Treatment Plant in Louisville, CO

Inclined Sludge Load Out System for Louisville Wastewater Treatment Plant in Louisville, CO - KWS Manufacturing

KWS Environmental provided a complete biosolids load out system including a 31-feet long inclined…

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Load Out System for Wastewater Grit and Screenings at Waterloo, ON WWTP

Load Out System for Wastewater Grit and Screenings at Waterloo, ON WWTP - KWS Manufacturing

KWS provided contour type gates which require less headroom and provide better sealing of residuals with…

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Shaftless Screw Conveyor Used to Convey Dewatered Grit for Lower Perkiomen Valley Regional…

Shaftless Screw Conveyor Used to Convey Dewatered Grit for Lower Perkiomen Valley Regional Sewer Authority (Oaks, PA) - KWS Manufacturing

Shaftless screw conveyor used to convey dewatered grit at a municipal wastewater facility.

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Food Waste Shaftless Vertical Conveying System

Food Waste Shaftless Vertical Conveying System - KWS Manufacturing

KWS engineers analyzed the existing plant machinery and layout to fully understand the Customer's…

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High Temperature, Extremely Heavy-Duty Shaftless Screw Conveyors for Pyrolysis Process

High Temperature, Extremely Heavy-Duty Shaftless Screw Conveyors for Pyrolysis Process - KWS Manufacturing

R-Gen Systems partnered with KWS to help them design a mechanical conveying system for injecting waste…

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Shaftless Screw Conveyor System to Elevate Dewatered Biosolids at Montoursville, PA WWTP…

Shaftless Screw Conveyor System to Elevate Dewatered Biosolids at Montoursville, PA WWTP (Includes Animation!) - KWS Manufacturing

Shaftless screw conveyor system to elevate dewatered biosolids from a Belt Filter Press to two loading…

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Biosolids Dumpster Loading System for Upgrade to Lafayette, CO WWTP

Biosolids Dumpster Loading System for Upgrade to Lafayette, CO WWTP - KWS Manufacturing

KWS designed and manufactured a complete biosolids distribution system from the discharge of the…

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Biosolids Load-Out Facility for Kitchener, Ontario, Canada

Biosolids Load-Out Facility for Kitchener, Ontario, Canada - KWS Manufacturing

KWS provided fully redundant systems from the centrifuges to the truck loading bays with two distribution…

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Biosolids Load Out System for Elmira Wastewater Treatment Plant in Ontario, Canada

Biosolids Load Out System for Elmira Wastewater Treatment Plant in Ontario, Canada - KWS Manufacturing

The KWS diverter gate separates low solids material from the product stream and diverts it back to the…

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Biosolids Load Out System for Big Ox Energy in Dakota City, NE

Biosolids Load Out System for Big Ox Energy in Dakota City, NE - KWS Manufacturing

The existing space constraints required KWS to maximize every inch of available space.

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Biosolids Load Out System for Dillwyn Water Treatment Plant in Buckingham County, VA

Biosolids Load Out System for Dillwyn Water Treatment Plant in Buckingham County, VA - KWS Manufacturing

KWS Environmental provided a complete biosolids load out system including shaftless screw conveyor,…

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Biosolids Load Out System for Doe Branch WRP in Little Elm, Texas

Biosolids Load Out System for Doe Branch WRP in Little Elm, Texas - KWS Manufacturing

KWS Environmental provided an electrically operated drain valve on the lower end of the inclined…

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Biosolids Load Out System Utilizing Flex-Wall Belt Conveyor and Screw Conveyors for Bloomsburg…

Biosolids Load Out System Utilizing Flex-Wall Belt Conveyor and Screw Conveyors for Bloomsburg WWTP in Bloomsburg, PA - KWS Manufacturing

Engineers at KWS Environmental worked closely Gannett Fleming to design every element of the load out…

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Biosolids Load Out System Utilizes Vertical Screw Conveyor at Kulpmont WWTP in Northumberland…

Biosolids Load Out System Utilizes Vertical Screw Conveyor at Kulpmont WWTP in Northumberland County, PA - KWS Manufacturing

KWS brought design expertise and a proven track record with shaftless vertical screw conveyors to the…

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Biosolids Storage and Load Out for Galt Waste Water Treatment Plant in the Region of Waterloo,…

Biosolids Storage and Load Out for Galt Waste Water Treatment Plant in the Region of Waterloo, Canada - KWS Manufacturing

The KWS Environmental load out system was designed for simplicity and rapid load out of trucks.

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