Vertical Screw Conveyor Manufacturer in India
Vertical Screw Conveyor Manufacturer in India
Custom vertical screw conveyors for dust-free, space-saving vertical elevation of powders and granules — fly ash, cement, limestone powder, fertilizer, chemical powder, food ingredients, and mineral dust. Short-pitch helical screw in enclosed casing. MS, SS304, SS316. Up to 15 m lift. Minimum footprint. PAN India installation.
What is a Vertical Screw Conveyor?
A vertical screw conveyor uses a short-pitch helical screw rotating at high speed inside a fully enclosed vertical casing — lifting bulk powders and granules straight upward in the minimum possible floor footprint, with complete dust containment from inlet to discharge.
Short-pitch screw — how vertical conveying works
Unlike horizontal screw conveyors that use full-pitch flights to push material axially, vertical screw conveyors use short-pitch (reduced-pitch) flights rotating at higher speed. The centrifugal force generated by the faster rotation pushes material outward against the casing wall — creating friction between material and casing that prevents material from sliding back down under gravity. This friction-supported conveying is what enables vertical elevation on the same basic screw principle.
The result is a conveyor that can elevate dry powders and granules vertically through a casing only slightly larger than the screw flight diameter — the most space-efficient vertical conveying solution available for suitable materials.
Minimum footprint — why engineers specify vertical screw
The primary reason engineers specify a vertical screw conveyor over a bucket elevator is floor space. A bucket elevator requires a full casing width (head and boot section), a separate loading section, and a separate discharge section — all taking up floor area and headroom that may not be available in an existing plant. A vertical screw conveyor requires only the casing cross-section at the floor — the footprint of the tube itself.
In plant retrofit projects, between processing floors, between silo levels, and in any plant where horizontal space is severely constrained, the vertical screw conveyor's minimal footprint makes it the only practical vertical conveying solution.
How a Vertical Screw Conveyor Works
Four stages of vertical material transfer — all within a sealed casing that prevents any dust emission from inlet to discharge, in a footprint as small as the casing diameter.
Material enters the vertical screw conveyor at the bottom inlet — connected via a flanged spout to a horizontal screw conveyor, bin outlet, or process machine discharge. The bottom inlet is typically designed to deliver material directly into the rotating screw without overfilling or bridging.
The short-pitch helical screw rotates at high RPM inside the enclosed casing. Centrifugal force pushes material outward against the casing wall — creating friction that holds material against the wall and allows the rotating screw flight to push it upward against gravity. Material travels in a helical path up the casing.
Material is continuously elevated at the rated TPH — determined by screw diameter, pitch, and rotational speed. The enclosed casing prevents any dust emission throughout the vertical lift path. No buckets, no chains, no belts — only the rotating screw shaft inside the sealed casing.
Material discharges at the top outlet — flanged to downstream equipment (silo, bin, horizontal conveyor, or process unit). The drive motor typically mounts at the top of the casing, directly above the head bearing, minimising the drive arrangement footprint and simplifying alignment.
Advantages of Vertical Screw Conveyors
Five engineering advantages that make the vertical screw conveyor the preferred vertical elevation solution for space-constrained plant layouts handling dry powders and granules.
Space Saving Design
The smallest floor footprint of any vertical conveying system — only the casing cross-section at floor level. A 200 mm vertical screw conveyor occupies just 200 mm × 200 mm at the floor — vs 600 mm+ width for a bucket elevator casing of equivalent capacity. Critical for plant retrofit and multi-floor installations.
Fully Enclosed Conveying
Complete sealed casing from inlet to discharge — no openings, no gaps, no cover plate joints. Material is enclosed for the entire vertical lift path. Meets PCB dust emission standards for cement, fly ash, and chemical powder handling without additional dust extraction.
Dust Free Operation
The sealed casing eliminates dust emission at the conveying stage — significant for fly ash (PCB compliance), cement (workplace dust standards), chemical powders (OEL compliance), and food ingredients (FSSAI hygiene requirements). SS304/SS316 options for food and pharma applications.
Low Maintenance
No buckets to inspect and replace, no chains or belts to lubricate and tension, no head and boot pulleys or sprockets. Only the screw flight wear and two shaft bearings (head and boot) require periodic attention — significantly lower maintenance than equivalent bucket elevator systems.
Continuous Vertical Material Transfer
Unlike skip hoists or batch vertical lifts, the vertical screw conveyor provides continuous material flow at rated TPH — no batch cycles, no idle time between lifts, no need for upstream surge hoppers to match a batch lift schedule. Material flow is as continuous as the upstream feed.
Simple Integration
Flanged inlet and outlet for direct bolted connection to upstream and downstream equipment. Drive motor mounted at head — no intermediate drives, no complex take-up arrangements. VFD option for throughput control. Standard flanges simplify integration with existing equipment.
Applications of Vertical Screw Conveyors
Vertical screw conveyors are deployed wherever tight floor space, complete dust enclosure, and moderate vertical lift heights are needed — across cement, power, chemical, food, fertilizer, and mineral processing industries.
Cement Plants
Cement powder, raw meal, and limestone dust elevation between floors within the cement plant — where the compact vertical screw footprint fits in structural bays that are too narrow for bucket elevator installation. MS with air-purge shaft seals.
Fly Ash Handling Systems
Fly ash elevation from ESP hopper level to silo infeed — for moderate lift heights (under 8 m) and lower capacities where a vertical screw conveyor is more economical than a chain-type bucket elevator. Sealed MS casing for PCB compliance.
Chemical Industry
Chemical powder elevation between production floors — calcium carbonate, talc, gypsum, pigments. Fully enclosed casing prevents worker exposure to chemical dust. SS316 option for corrosive chemical powders. Explosion-proof motor for hazardous areas.
Food Processing Industry
Flour, sugar, salt, starch, and food ingredient elevation between floor levels in food processing plants. SS304 casing with polished bore and food-grade seals. Pest-proof complete enclosure for FSSAI compliance. Easy-clean flanged inlet and outlet.
Fertilizer Plants
Fertilizer powder and granule elevation between blending and storage floors — where the plant layout constrains horizontal screw conveyor inclination. Sealed MS casing for hygroscopic materials. SS options for corrosive fertilizer environments.
Mineral Processing Plants
Mineral powder, gypsum, barite, calcium carbonate, and silica elevation between process stages in mineral processing facilities. Heavy-duty MS casing with abrasion-resistant flight for abrasive mineral powders. Complete enclosure for silica dust compliance.
Materials Handled
Vertical screw conveyors handle free-flowing dry powders and granules — materials that have adequate angle of repose and flowability to be pushed vertically by centrifugal-friction conveying.
Cement Powder
Fly Ash
Limestone Powder
Chemical Powders
Fertilizers
Food Ingredients
Mineral Dust
Grain & Seeds
Technical Specifications
All vertical screw conveyors are made-to-order. Casing diameter, screw pitch, and screw speed are calculated from your material's bulk density, required TPH, and lift height.
| Parameter | Specification |
|---|---|
| Conveyor type | Vertical screw — short-pitch screw in enclosed vertical casing |
| Casing diameter | 150 mm / 200 mm / 250 mm / 300 mm standard |
| Lift height | Up to 15 m standard; multi-stage for greater heights |
| Screw pitch | Short pitch (30–60% of diameter) — for vertical conveying |
| Screw speed | Higher than horizontal — calculated per material and diameter |
| Filling degree | 15–25% of casing cross-section (limited by centrifugal action) |
| Casing thickness | 3–6 mm (per material abrasiveness) |
| Shaft bearings | Head bearing (above motor) + boot bearing (at inlet) |
| Intermediate bearings | Added at 4–6 m intervals for lifts over 8 m |
| Shaft seals | Mechanical seal / stuffing box / air purge — per material |
| Drive position | Motor at top (standard) — direct drive or gearbox |
| Power supply | 415 V, 3 Phase, 50 Hz |
Conveyor Diameter Options
* Capacity depends on material bulk density and screw speed. Free calculation with every quotation.
Construction Materials
Drive Systems
How to Select the Right Vertical Screw Conveyor
Five parameters our engineers use to specify casing diameter, screw pitch, construction material, and drive — plus confirming whether a vertical screw or bucket elevator is the correct choice for your application.
Vertical Screw Conveyors — Live at Customer Plants
Real Neo Conveyors screw conveyor systems in operation — cement, fly ash, and powder handling installations across India.
More installation videos: youtube.com/@neoconveyors
Vertical Screw Conveyor vs Bucket Elevator
The two most common choices for vertical bulk material elevation — selecting the correct one depends on lift height, capacity, floor space, material, and budget.
| Feature | ✅ Vertical Screw Conveyor (This page) | Bucket Elevator |
|---|---|---|
| Floor footprint | Very small — just casing diameter | Larger — full casing width + boot + head |
| Dust control | Excellent — fully sealed casing | Good — sealed casing, but more joints |
| Fine powder handling | Excellent — screw carries fines reliably | Good — centrifugal loss at discharge for very fine |
| Lift height | Moderate — up to 15 m standard | High — up to 40 m+ standard |
| Capacity per unit size | Lower — limited by centrifugal filling | Higher — bucket volume × speed |
| Fragile material handling | Moderate — screw contact may break fragile material | Excellent — gentle bucket scooping |
| Maintenance | Low — no buckets, no chain/belt | Moderate — bucket and chain/belt inspection |
| Capital cost (same capacity) | Lower for smaller capacities | Lower for larger capacities and heights |
| Best applications | Space-constrained, fine powder, moderate lift | High capacity, tall lift, fragile materials |
Need higher capacity or taller lifts? Bucket Elevator →
Recent Vertical Screw Conveyor Installations
Four recent projects — fly ash, cement, chemical, and mineral processing — demonstrating real-world capacity, lift height, and results achieved at customer plants.
Thermal power plant needed fly ash elevated 6 m from ESP collection level to silo infeed — moderate lift height where a chain bucket elevator was considered oversized and costly. MS vertical screw conveyor with air-purge shaft seals, sealed casing, and flanged connections to horizontal screw at base and silo nozzle at top. PCB dust compliance required fully sealed design.
Cement packing plant needed OPC cement transferred vertically 8 m between dispatch floor and mezzanine hopper — in a narrow structural bay where no bucket elevator could fit. MS vertical screw conveyor with two intermediate bearings, air-purge shaft seals at boot and head, and dedicated VFD for throughput matching to packing machine speed.
Industrial chemical plant needed barium sulphate powder (bulk density 1.6 t/m³, mildly corrosive) elevated 5 m between floors in a GMP-adjacent building requiring stainless construction. SS316 vertical screw conveyor with electro-polished bore, PTFE shaft seal, and explosion-proof motor for Zone 2 hazardous area classification.
Mineral processing plant needed limestone powder (bulk density 1.3 t/m³, abrasive) elevated 10 m from ground-level mill discharge to elevated storage silo. Heavy-duty MS vertical screw with abrasion-resistant AR400 steel casing bore and flight, three intermediate bearings for the 10 m lift, and heavy-duty shaft seals. Complete silica dust enclosure for occupational health compliance.
Why Choose Neo Conveyors?
Every vertical screw conveyor is engineered from your material data and lift height — casing diameter, screw pitch, intermediate bearings, and construction material specified for your application. Fabricated in-house. Installed by our own engineers.
Casing diameter, short-pitch screw, intermediate bearing positions, and shaft seal type all calculated from your material and lift height. We also confirm whether vertical screw or bucket elevator is correct for your application — at no charge.
18+ years of screw conveyor projects across cement, power, chemical, food, fertilizer, and mineral industries. References from clients in your sector available on request.
All construction materials supplied from our own fabrication — including abrasion-resistant casing bore, polished SS304/SS316 bore for food and pharma, and explosion-proof motor options.
Installation, alignment, intermediate bearing fitting, shaft seal adjustment, and commissioning by Neo Conveyors' own engineers. No third-party erection contractors.
GA drawing showing casing diameter, screw pitch, inlet/outlet flange positions, bearing positions, and drive details included with every quotation at no extra charge.
Replacement screw flights, casing sections, shaft seals, and intermediate bearings stocked for all diameters. Annual Maintenance Contracts and inspection visits available PAN India.
Related Conveyor Solutions
Explore the bucket elevator, horizontal screw, and tubular screw conveyors that connect to or complement your vertical screw conveyor system.
Frequently Asked Questions
Vertical Screw Conveyor — Service Locations Across India
Manufactured at our Ghaziabad facility — installed and commissioned by our own engineers at cement plants, power plants, chemical facilities, food processing plants, and mineral processing units across all Indian states.
Request a Free Quote — GA Drawing Included
Share your material name, bulk density, required TPH, lift height, and available floor space. Our engineers confirm the correct equipment and calculate casing diameter, screw pitch, and motor power — GA drawing included, no charge.
