A direct-driven shaftless spiral, running without internal bearings on a lined steel or stainless steel trough. SPIRAC horizontal shaftless screw conveyors benefit from high capacities and a resistance against tangling materials.
Lengths of over 50M are possible utilising only a singe drive. The secret is in the designed strength of the SPIRAC spiral. Angles up to 35° are possible, after which our range of vertical conveyors can be employed.
The shaftless spiral allows higher filling rates and lower rpm’s resulting in less wear and consequently less maintenance and downtime.
Although the spirals can be made of many different materials, the primary material is HTMAS (High Tensile Microalloyed Steel) - a special steel from Sweden with mechanical properties that result in the SPIRAC spiral having a very high tensile strength.
Eliminating intermediate and end bearings reduces major maintenance work. It also allows efficient and direct transfer into another conveyor – horizontal, inclined or vertical.
SPIRAC’s proprietary liner, DURAFLO SPX, has been designed specifically to ensure low wear and long life.
A combination of material thickness and formulation gives DURAFLO SPX its unique wearing characteristics. DURAFLO SPX has been developed over many years and is one of the key features which ensures that SPIRAC conveyors are industry leading.
The DURAFLO SPX liner also has a built-in wear indicator with a snap-in, snap-out feature enabling easy replacement.
SPIRAC conveyors are totally enclosed. There is no spillage of the material being conveyed and odours are completely contained. SPIRAC’s direct-drive design allows a clean and efficient transmission without the maintenance required with belt and chain drives.
Ability to handle varying flow rates, consistencies dry solids contents, free water, temperatures without problems from a single fixed speed.
Totally enclosed – no visual or odour contact from inlet to outlet.
Safe transport – lids fully bolted along length.
High fill rates – low power, low speeds = low wear and balanced transportation.
No spillage of materials during transport – no carry over.
No ragging or blockage possible.
Low operator intervention.
Can convey directly into the side of a secondary or vertical conveyor.
Wide range of sizes and designs available.
Multiple outlets possible.
Highly flexible design- many support + operational facilities possible.
SPIRAC Conveyor specifications
HTMAS (High Tensile Microalloyed Steel)
304 & 316 Stainless steel
Special coatings available
Duplex Stainless steel
Variable speed option
Fully enclosed with bolted or quick release lids
304 & 316SS. Duplex SS, Mild Steel
Sewage screenings conveyance and dewatering
Sewage sludge conveying
Sewage grit conveying
Industrial waste product conveying
Pulp and paper rejects conveying
SPIRAC | Screening, Grit & Sludge Equipment
Municipal screening, grit and sludge handling solutions are our primary focus, but SPIRAC also offers conveying, dewatering and washing solutions for industrial applications. The SPIRAC network of engineers is on hand to collaborate with you right from the start of your project. Our team will ensure that all solutions are manufactured, installed and maintained in compliance with local specifications and best global practice.
And don’t forget, full after sales support is part of SPIRAC’s service.
Shaftless Spiral Conveyor Systems
SPIROTAINER® containment & transport
- Screens (RAKEGUARD raked coarse screen, CHAINGUARD coarse screen, FINEGUARD traveling fine screen, BANDGUARD centre flow band screen, SPIROGUARD®, STEPGUARD®)
- Screenings washing (SPIROWASH®)
- Dewatering & compaction (SPIROPRESS®)
- Grit capture & separation (SANDSEP®, Grit Vortex)
- Grit washing (SANDWASH)
- Silos (Live Bottom & Sliding Frame)