Screw Conveyors

 WAM® is one of the largest Screw Conveyor manufacturers in the world and in a leading position for many applications.

 Over the years Screw Conveyors for specific purposes have been developed.

 Screw conveyors are used in many industries to transport and distribute flowable bulk solids materials. While one of the oldest and simplest means of conveying products, they are compact, versatile and economical. With certain modifications and/or variations in the mechanical arrangement, screws may also be used to mix, blend, or agitate. In applications where close control of material flow is critical, the screw conveyor may be used as a highly accurate metering device.

NOW  PROVIDING CEMA Rated Trough Screw Conveyors have been specially designed for handling powdery and granular materials in flour mills. Their design, their special finishing grade, and the vast range of options and accessories take the requirements of the flour milling industry into particular consideration.

                 MODULAR SHAFTED SCREW CONVEYOR  

 The modular shafted screw conveyor system is highly versatile offering numerous solutions for conveying flowable bulk solids materials. Shafted screw conveyors are manufactured from mild steel, AR (abrasion resistant) steel, stainless steel and other alloys, with a suitable surface finishing. They are made up from a U or V-shape trough that is equipped with at least one outlet spout, an end plate at each trough end, helicoid or sectional screw flighting welded on a center pipe bushed at each end, end bearing assemblies complete with shaft sealing unit, a certain number of intermediate hanger bearings depending on the overall length of the screw conveyor, and bolted trough cover sections. Shafted screw conveyors are equipped with a gear drive that suits the application. Screw feeders or live bottom conveyors with multiple screws in a common housing are available for applications such as bin unloading. Depending on the material to be handled shafted screw conveyors can be fabricated in a U.S. industry standard Group 1, Group 2, and Group 3 component construction.
Current U.S. industry standards cover 6”, 9”, 12”, 14”, 16”, 18”, 20” and 24” diameter conveyor sizes with U-trough. Standard shaft sizes are 1-1/2”, 2”,
2-7/16”, 3” and 3-7/16” diameters, with 2-bolt drilling. While other screw sizes, shaft diameters and V-trough (flared) housings are available, there are no established industry standards.

SHAFTLESS SCREW (SPIRAL) CONVEYORS

 The Shaftless screw conveyor is an alternative concept to the traditional shafted screw conveyor. Shaftless screws are available from 6” to 24” diameters in single flight and 9” to 24” diameter in double flight configurations. Material is conveyed by an extra-heavy-duty shaftless screw that slides on a wear-resistant liner inside the conveyor trough housing. The U-troughs are manufactured in carbon steel or in 304 L / 316 L stainless steel, including an appropriate surface treatment. The lower part of the trough has an appropriate liner installed. At one trough end there is a standard bottom discharge or open end type outlet. At the drive end the screw conveyor is equipped with an end plate holding the end bearing assembly with flanged shaft coupling with the screw. The drive unit installed suits the application.
The Shaftless screw conveyor can be loaded from above into the open trough (standard), or through an inlet spout included in a bolted trough cover (option), or from the side through a special side inlet in the loading zone of the trough (option).

 Extra-heavy-duty Screw Conveyors, designed for continuous operation in cement, lime and gypsum processing, come with flanged shaft couplings for easy screw replacement.

Difficult materials with a high moisture content that have a tendency to stick to the centre pipe or flight in traditional screw conveyors, such as sludge or screenings, are successfully handled by Shaftless Screw or Spiral Conveyors with ultra-heavy-duty helicoid flighting.
 
                         TUBULAR SCREW CONVEYORS

Tubular Screw Conveyor system is highly versatile offering numerous solutions for conveying powdery or granular materials. Tubular Screw Conveyors are manufactured from carbon steel with a suitable surface finishing. They are made up from a tubular trough that is equipped with at least one inlet and outlet spout, an end plate at each tubular trough end, helicoid screw flighting welded on a centre pipe with a coupling bush at each end, two end bearing assemblies complete with adjustable shaft sealing unit, and a number of intermediate hanger bearings depending on the overall length of the screw conveyor. Furthermore, Tubular Screw Conveyors are equipped with a gear motor that suits the application.

Depending on the material to be handled, Tubular Screw Conveyors come in a light or medium-heavy-duty design.     

 EASYCLEAN® Screw Conveyors

EASYCLEAN® Screw Conveyors and Feeders, which are entirely manufactured in stainless steel, are a customized version of the modular  Tubular Screw Conveyor System.
EASYCLEAN® Screw Conveyors consist of a tubular casing equipped with at least one inlet and outlet spout, one end plate at the drive end to carry end bearing assembly and drive unit, a tube cover plate complete with screw fixing locator for support of the screw at the end opposite the drive unit, a rotating screw with shaft coupling bushes at each end, a gear motor with integrated end bearing assembly complete with adjustable shaft sealing unit in accordance with the requirements of the application.
To satisfy the needs of the most demanding industrial sectors, EASYCLEAN® Screw Conveyors come with a high finishing grade. Finishing of fabricated components takes place on machine tools that guarantee perfectly smooth surfaces in order to reduce material residue inside the screw conveyor.

 High-Temperature Screw Conveyors

 Extra-heavy-duty MT / HT Trough Screw Conveyors have been developed for medium-high temperature (MT series) and high temperature (HT series) applications. For this reason intermediate bearings are absent. They are manufactured either in carbon or in stainless steel with appropriate surface treatment. They are made up from a U-shape trough that is equipped with at least one outlet spout, an end plate at each trough end, helicoid screw flighting welded on a centre pipe with flanged coupling at each end, two end bearing assemblies complete with offset shaft sealing unit, and a bolted trough cover usually equipped with at least one inlet spout. Furthermore, MT / HT Screw Conveyors are equipped with a gear motor that suits the application.

SINTSCREW® trade-mark

The SINTSCREW® trade-mark defines a wide range of screws (augers) for screw conveyors manufactured from SINT® engineering polymers. WAM®’s technology in casting polymers of different types and quality has led to a great variety of design options.

CONTINUOUS TWIN SHAFT PADDLE MIXERS

Twin Shaft Paddle Mixers (MESC-UM as conditioner with liquid injection) are equipped with two parallel counter-rotating intermeshing paddle shafts. The adjustable angle of inclination of the mixing paddles allows perfect adaptation to the different characteristics of the materials and to the requirements of the mixing process.

Twin Shaft Paddle Mixers are used for mixing of powders, sludge granulation and neutralization, as well as for the conditioning of powders (dust), ashes, or sludge.

BUCKET ELEVATOR

 A comprehensive Bucket Elevator range that is able to meet each and every user’s requirements in terms of problem solution and reliability in time.

 Bucket Elevators are used for vertical elevation of cereals and similar dry, powdery, non-abrasive, non packing materials that have a particle size between 1 and 3mm and a slide angle of less than 40 degrees. The material is introduced into a loading hopper which is included in the foot section. There the material is continuously picked up by appropriately shaped buckets which are fixed at an equal distance to an endless belt that rotates around a foot and a head roller wheel. The buckets are discharged through an outlet spout in the head section by centrifugal force after having passed the upper roller wheel.
Bucket Elevators are used in handling and storage plants for grain, cereals and other materials, as well as in different types of material processing plants.

CHAIN OR DRAG CONVEYORS

 Chain Conveyors are amongst the most widely used conveyor types in many installations for handling powdery or granular materials.
Thanks to their robust heavy-duty design, Chain Conveyors meet every user’s requirements in terms of reliability and durability.