Bespoke Spiral
Elevators

A vibrating helical trough carries suitable bulk material around a central structure between elevations. The drive and suspension produce the motion; the product advances along the trough rather than being carried on a belt. We develop the width, geometry, drive and loading arrangement around material and throughput. Similar-looking spirals can behave differently when moving mass, drive or suspension differs. Cooling, drying and screening are additional duties needing specific provisions and acceptance conditions. We include support, cleaning and maintenance access in the review so the machine works as part of your production line.

A vibratory spiral elevator is a bulk-material conveyor with a vertically arranged helical trough. Vibration moves suitable product along the trough from inlet to discharge. It handles material, rather than carrying passengers. Material properties, elevation and throughput determine the configuration. The vertical route can be useful where a long incline will not fit, but the complete installed space and handling suitability still need assessment for the particular process.

The main duty is transferring suitable bulk material between elevations. A specified design may also cool, dry, screen or return product through a recirculation route. Those functions are not automatically included in every spiral. We establish the required result and assess treatment area, residence time, services and outlets. Where functions conflict, separate equipment can be more practical. The proposal explains what the machine will do and how each required result is assessed.

We assess lift height against material, throughput, structure and installation space. Provide inlet and discharge elevations measured from the same reference level. Height alone does not establish capacity. Drive position, support loads, transport and maintenance can become particularly important as the installation grows. Send the required lift and layout so we can confirm a feasible arrangement and its limits for the actual project instead of relying on a general maximum-height claim.

We assess suitable granules, pellets, powders, food pieces and some irregular materials. The material name alone does not select the machine. Density, particle size, moisture, temperature and tendency to stick or break affect conveying response. We also need normal and peak flow and any processing required during elevation. Samples or trials help where behaviour is uncertain, rather than assume every bulk solid moves along a spiral in the same way.

Fragile products can be assessed with attention to motion, layer depth and every transfer point. Gentle movement along the trough can still be undermined by a large inlet or discharge drop. We agree acceptable breakage, coating loss or other quality limits. A representative trial can compare condition before and after handling. The design works towards a defined result rather than promising zero damage for every material and operating rate.

Air-cooling features can be included where the material and heat duty suit the arrangement. Air distribution, temperature, residence time and product depth all affect the result. Fans, ducting, filtration or extraction are included in the scope where required. Lightweight or hygiene-sensitive products may limit air contact. We specify the cooling performance under agreed conditions instead of describing any open spiral as an effective cooler for every application.

A spiral can provide movement and exposure time within a specified drying process. Moisture removal also depends on air conditions, heat supply, moisture load and how the product holds water. We need starting and target moisture contents and the measurement basis. Surface drying differs from reducing internal moisture. Extra dewatering or drying equipment may be necessary. Capacity therefore has to meet the drying requirement, not only the mechanical conveying rate.

We compare energy at the same throughput, lift and process result. Motor nameplate power alone does not describe energy per tonne, especially when fans, extraction or cooling services are involved. The assessment includes the complete system and operating cycle. A spiral is not automatically lower-energy than every alternative. Where consumption is an important objective, we agree the comparison and measurement conditions so the decision is based on useful production rather than an isolated motor rating.

There is no conveying belt or chain to lubricate along a vibratory spiral's product path. This does not mean the whole machine has no lubrication or maintenance requirements. The fitted motors may have sealed-for-life bearings or manufacturer-specified lubrication requirements, depending on model and conditions. Follow the supplied instructions for the exact components. Drive fixings, suspension, wear areas and connections still require suitable inspection; the complete spiral should not be described as maintenance-free.

Washdown requirements can be built into the specification using the cleaning chemicals, temperature, pressure and frequency. Surfaces, seals, drainage and protection of drive and electrical components must suit that regime. An IP rating does not establish compatibility with every cleaning method. We also examine retained water and inspection access. The agreed design states the washdown conditions instead of assuming all stainless steel spirals can be cleaned in the same way.

Full or partial covers can be assessed for dust control, product protection or process treatment. We also need practical access for inspection, cleaning and retained-material removal. Inlets, outlets and moving connections form part of the enclosure. Displaced air and extraction may need attention. A cover alone does not establish a containment level, so exposure and cleanliness targets should be included in the specification and verification requirements.

Stainless steel can be specified where the product, cleaning or corrosion conditions require it. We distinguish product-contact construction from the frame and other non-contact components. Grade and finish follow the actual duty: 304 and 316 are not interchangeable answers to every corrosion problem. Tell us the chemicals, moisture, temperature and cleaning method. The construction and any material documentation are then confirmed within the agreed specification.

A spiral concentrates the route vertically, which helps where horizontal run is restricted. Alternatives should be compared at the same throughput and elevation. We include drives, supports, transfer chutes and operating and maintenance clearances. Cooling or drying may require further equipment outside the spiral outline. Showing the full envelope on the layout gives a useful comparison instead of promising the same space saving for every conveying application.

A spiral can be designed for an agreed continuous-duty application, with its load, operating conditions and maintenance requirements specified accordingly. Continuous duty does not remove the need for inspections or planned maintenance. We need operating hours, starts per hour, material variation and loaded stop or restart conditions. These affect the drive, structure and controls. The operating limits should match the service expected from the actual machine.

Height alone does not determine capacity. The conveying path, usable width, material depth, travel speed and behaviour of the product all matter. A spiral carrying a light, bulky material can reach its practical volume limit before reaching a high weight throughput. Another application may be limited by gentle handling requirements or the time needed for cooling. We therefore design around the material and process duty, then establish the diameter, conveying geometry and drive arrangement needed for that duty.

We assess the complete installation space, not just the outside diameter of the spiral. The layout needs to account for the inlet and discharge, drive arrangement, supporting frame, connections and access around the equipment. A machine that fits on a drawing can still be difficult to clean or maintain when installed between other machines. During design review, we work through those interfaces with you. The aim is a compact installation that remains usable, rather than the smallest possible outline. Spiral geometry and drive positioning can be adapted to installation requirements.

Where the installation allows it, our preference is to make routine inspection and motor replacement accessible from a lower level. However, the choice also needs to suit the inlet arrangement, available space and overall machine design. We do not assume that one drive position is right for every project. Both top-drive and bottom-drive configurations are established arrangements for vibratory spirals. We discuss that choice during the layout stage, including how a motor would actually be removed and replaced after installation.

Yes, cooling can be incorporated into a suitably designed spiral. Depending on the duty, heat can be removed through contact with cooled conveying surfaces or by an appropriate air arrangement. Combining transport and thermal treatment is an established use of vibratory spirals. For your quotation, we need the material, throughput, inlet temperature, target discharge temperature and available cooling services. We would establish the required duty and operating conditions before committing to an outlet temperature.

No. Cooling reduces temperature; drying removes moisture. The equipment may combine transport with either process, but the required treatment and services differ. We therefore need to know whether you want a cooler product, a reduction in moisture, or both. For a drying enquiry, specify the starting and target moisture contents and how they are measured. That allows the proposal to address the actual process requirement. We would not describe a product as adequately dried simply because its surface feels cooler.