Tubular Screw Conveyor Manufacturer in India
Tubular Screw Conveyor Manufacturer
in Ghaziabad, Delhi NCR & India
Fully enclosed pipe-type auger conveyor systems — the industry standard for dust-free handling of cement, fly ash, chemical powders, food-grade ingredients, fertilizer, and pharmaceutical materials. Zero dust emission. Inclined operation up to 45°. Screw diameter 100–500 mm. Capacity up to 100 TPH. MS / SS 304 / SS 316. Custom-built in Ghaziabad. PAN India installation since 2007.
What Is a Tubular Screw Conveyor — and When Is It the Right Choice?
Neo Conveyors is a specialist tubular screw conveyor manufacturer in India since 2007. A tubular screw conveyor — also called a pipe screw conveyor or enclosed screw conveyor — houses the rotating helical screw flight inside a fully enclosed circular pipe or tube rather than an open-top U-shaped trough. This single design feature makes the tubular screw conveyor the only correct specification wherever your plant requires complete dust containment, material enclosure during conveying, hygienic handling, or inclined transport of fine powders. The enclosed pipe body prevents all dust emission at the conveyor body — critical for cement, fly ash, chemical fine powders, flour, spices, pharmaceutical API, and any material that must not contact the external environment or create workplace dust exposure. Tubular screw conveyors also handle inclined transport up to 45° more effectively than open U-trough types, because the enclosed housing prevents material from tumbling back down the screw. As part of our complete screw conveyor range →, Neo Conveyors designs each tubular system from your material, required TPH, length, and inclination — fabricated at our Ghaziabad plant and installed PAN India by our own engineers.
Screw Conveyor Type Navigator
Tubular is one of 5 screw conveyor types we manufacture. Select the right type for your material and application:
Tubular Screw Conveyor — Industrial Operation
Watch Neo Conveyors' screw conveyor systems in real industrial operation — enclosed dust-free material conveying at cement, chemical, and food processing plant installations commissioned by our own engineering team.
▶ Neo Conveyors — Screw Conveyor Installations & Manufacturing Overview
How a Tubular Screw Conveyor Works — Construction & MOC Selection Guide
Understanding the four-stage conveying cycle and the three material of construction options ensures you get the correct specification for your material, hygiene standard, and operating environment the first time.
Material of Construction (MOC) Selection Guide
MOC selection is driven by material corrosivity, hygiene requirement, and operating temperature. Our engineers specify the correct MOC for your application before design.
Standard Industrial
Painted or powder-coated mild steel pipe and flights. For cement, fly ash, fertilizer, sand, and non-corrosive industrial powders. Most economical option.
Best for: Cement · Fly Ash · Fertilizer
Food Grade / Mild Corrosive
Stainless steel 304 pipe, screw, and end covers. Polished interior for food hygiene. Suitable for flour, sugar, spices, milk powder, and mildly corrosive chemicals.
Best for: Food · Spices · Mild chemicals
Pharma / Highly Corrosive
SS 316 / 316L pipe, screw, and flights with electro-polished interior and FDA-compliant seals. For pharmaceutical API, reactive chemicals, saline, and aggressive environments.
Best for: Pharma API · Reactive chemicals
Up to 45° Inclination
Optimised pitch and RPM for inclined conveying up to 45°. Enclosed pipe prevents material backflow. Single unit replaces complex inclined trough with transfer points.
Best for: Multi-floor · Inclined transfer
Variable Speed Control
Variable frequency drive on geared motor — allows precise TPH control from control panel without stopping. Essential for process-integrated dosing and metering applications.
Best for: Dosing · Process integration
Multiple Feed Points
Multiple feed inlets along one conveyor body — for collecting material from several discharge points into one transfer line. Used in silo discharge, mixing, and blending applications.
Best for: Silo discharge · Blending
MS is the most widely specified construction for Indian cement, fly ash, and fertilizer applications. SS 304 is standard for all food and FMCG applications. SS 316 is mandatory for pharmaceutical and highly corrosive chemical environments.
The Four-Stage Tubular Screw Conveying Cycle
Material Feed Inlet
Bulk material enters the tubular conveyor through a flanged inlet port on the top of the pipe body — via gravity from a silo outlet, discharge hopper, or upstream equipment. An inlet slide gate controls feed rate. The enclosed inlet prevents any dust emission at the loading point.
Screw Rotation Inside Pipe
A helical screw flight welded to a central shaft rotates inside the closed circular pipe. As the screw rotates, the flights push material axially along the pipe — like a large auger through an enclosed bore. The pipe housing prevents material from escaping or generating dust at any point along the conveyor body.
Controlled Material Flow
Material moves at a rate determined by screw RPM and diameter — both controlled precisely by the geared motor and VFD. For inclined runs up to 45°, the optimised pitch and RPM prevent material from sliding back, maintaining consistent throughput without the efficiency loss that affects open U-trough conveyors at inclination.
Dust-Free Discharge
Material exits through a flanged outlet spout at the bottom of the pipe at the far end. The outlet connects directly to the downstream silo, hopper, or process equipment via flange — maintaining the fully enclosed, dust-free material path from inlet to discharge without any open transfer point.
Tubular Screw Conveyor — Technical Specifications
All systems are custom-designed from your material bulk density, required TPH, pipe diameter, length, and inclination. Every order begins with a capacity and motor power calculation by our engineers at no charge — including a GA drawing with every serious quotation.
| Housing Type | Circular pipe / tube — fully enclosed |
| Screw Diameter | 100 mm / 150 mm / 200 mm / 250 mm / 300 mm / 400 mm / 500 mm |
| Conveyor Length | Up to 20 m per section — multi-section for longer runs |
| Capacity | Up to 100 TPH — calculated per material bulk density |
| Inclination | 0° (horizontal) to 45° — custom pitch & RPM for each angle |
| Screw Flight Type | Standard / Ribbon / Variable Pitch / Hard-Faced |
| Material of Construction | MS / SS 304 / SS 316 / SS 316L |
| Internal Surface Finish | Painted / Pickled / Polished (SS food-grade) / Electro-polished |
| Drive Type | Geared motor — flange or foot mount |
| Speed Control | Fixed speed or VFD variable speed |
| Inlet / Outlet | Flanged ports — custom position and orientation |
| Sealing | Lip seal / Mechanical seal (food / pharma grade) |
| Bearing Housings | Sealed — grease or oil bath lubrication |
| Operating Temperature | Standard to 200°C — high-temp variant available |
| Power Supply | 415 V, 3 Phase, 50 Hz |
Approximate Capacity Guide (Horizontal, 40% Fill)
| Screw Diameter | Light Powder ~0.4 t/m³ | Heavy Powder ~1.2 t/m³ |
|---|---|---|
| 100 mm | 1–2 TPH | 3–5 TPH |
| 150 mm | 3–6 TPH | 8–14 TPH |
| 200 mm | 6–12 TPH | 16–28 TPH |
| 300 mm | 15–28 TPH | 40–70 TPH |
| 400 mm | 28–50 TPH | 70–100 TPH |
| 500 mm | Custom calculation — contact engineers | |
Indicative only. Actual capacity depends on screw RPM, inclination angle, material bulk density, moisture, and fill ratio. Our engineers calculate exact capacity for your material before manufacture — a GA drawing is provided with every quotation.
What Materials Are Suitable for Tubular Screw Conveyors — and What Are Not
Tubular screw conveyors are designed for free-flowing to moderately cohesive dry bulk powders and granules. Correct material suitability assessment before purchase prevents the most common cause of screw conveyor operational problems — specifying the wrong type for your material.
- Cement powder — enclosed prevents dust emission
- Fly ash and bottom ash — zero dust operation
- Wheat flour, rice flour, and food powders
- Sugar — refined and raw granules
- Milk powder and dairy powders
- Spices, condiments, and seasoning powders
- Fertilizer granules and powder — DAP, urea, potash
- Lime powder and calcium carbonate
- Gypsum powder
- Chemical fine powders — non-hygroscopic
- Pigments and coating powders
- Pharmaceutical API and excipient granules
- Plastic granules and pellets
- Mineral powders — silica, quartz, limestone powder
- Coffee powder and cocoa powder
All suitable materials should be free-flowing to moderately cohesive and dry (moisture <15%). Material bulk density, abrasiveness, and temperature must be specified for correct screw and flight design selection.
- Sticky, wet sludge or filter cake — use shaftless screw conveyor
- Fibrous materials (wet biomass, bagasse) — use shaftless type
- Large lumps > 30% of screw diameter — clearance insufficient
- Coarse rock, aggregate, or stone — use belt or drag chain conveyor
- Slurry or semi-liquid material — use pump or drag chain
- Highly abrasive sharp materials (quartz lumps) — hard-facing required
- High-moisture sticky materials (>25% moisture) — clogging risk
- Long-distance transport (>50 m) — use belt conveyor
- Very high temperature materials (>250°C without special design)
For sludge and wet/fibrous materials: shaftless screw conveyor →
For aggregate, coal, or lump materials: belt conveyors →
For long-distance powder transport: ask our engineers →
✅ Suitable Materials at a Glance
Tubular Screw Conveyor vs U-Trough Screw Conveyor — Which Is Right for Your Material?
The single most important selection decision when specifying a screw conveyor — open U-trough or fully enclosed tubular. Choosing incorrectly results in dust emission, regulatory non-compliance, or operational problems after installation.
| Factor | ✅ Tubular Screw Conveyor | U-Trough Screw Conveyor |
|---|---|---|
| Housing type | Fully enclosed circular pipe | Open-top semicircular trough |
| Dust containment | Excellent — zero dust at conveyor body | Moderate — open top allows dust emission |
| Fine powder handling | Ideal — pipe prevents any leakage | Limited — fine powder escapes at top |
| Inclined operation (15°–45°) | Excellent — enclosed pipe prevents backflow | Reduced efficiency — material slips back |
| Food & pharma hygiene | Ideal — no ambient air contact | Less suitable — open trough exposes material |
| Hazardous chemical handling | Ideal — no personnel dust exposure | Not suitable — open top is a safety hazard |
| Cleaning and access | Moderate — end covers must be removed | Excellent — full trough access from top |
| Multiple material types | Less suitable — cleaning is more involved | Better for frequent product changes |
| Capacity at same diameter | Lower — pipe limits fill ratio to ~30% | Higher — trough allows 45% fill |
| Material cost | Slightly higher — enclosed pipe fabrication | Lower — simpler open trough construction |
| Best applications | Cement, fly ash, food powder, pharma, chemicals, inclined transfer | Grain, sugar, granules, single-floor horizontal transfer, easy-clean needs |
Need open trough for grain and granule transfer? U-Trough Screw Conveyor → | Full screw conveyor range: Screw Conveyor Manufacturer India →
Why Tubular Screw Conveyors Are the Standard for Dust-Free Powder Handling
Every cement plant, food factory, chemical processing unit, and pharmaceutical facility in India that moves fine powders in enclosed, dust-free conditions specifies a tubular screw conveyor — not because of convention, but because it is the only practical solution that delivers complete material containment in a compact, reliable, low-maintenance system.
Zero Dust Emission at Conveyor Body
The enclosed pipe housing provides complete material containment along the full conveyor length — no dust leakage at the trough, no open material surface to generate airborne particles. Critical for PCB compliance in cement plants and chemical factories.
Reliable Inclined Operation up to 45°
The enclosed pipe body prevents material from tumbling back over the screw flights on inclined runs — enabling consistent throughput at angles where open U-trough conveyors lose 30–50% of their horizontal capacity. One unit replaces a horizontal conveyor plus bucket elevator plus transfer point.
Food-Grade and Pharma Compliant
SS 304/316 polished interior with food-grade mechanical seals creates a hygienic, contamination-free material path meeting FSSAI, GMP, and FDA requirements — not achievable with an open-top U-trough that exposes material to ambient air and contaminants.
Safe Hazardous Chemical Handling
Fully enclosed conveying of hazardous chemical powders and toxic dusts without any personnel exposure at the conveyor body — the only acceptable specification for MSDS-classified hazardous materials in Indian chemical plants under OSHA/factory safety regulations.
Low Maintenance — Few Moving Parts
A rotating screw shaft and two end bearing assemblies are the only moving parts. No belt to replace, no chain to tension, no rollers to fail — tubular screw conveyors achieve very long service intervals with minimal downtime when maintained according to schedule.
Compact — Minimal Floor Space
The enclosed pipe body has a much smaller cross-section than equivalent belt conveyors or drag chain systems — critical in space-constrained cement plants, chemical factories, and food processing facilities where equipment floor footprint is a key design constraint.
Tubular Screw Conveyor — Custom Configurations We Engineer
Every tubular screw conveyor is custom-designed to your material, required capacity, inclination, MOC, hygiene standard, and process integration requirement. Common plant-specific configurations that Neo Conveyors engineers and manufactures are listed below.
🏗️ MS Industrial Standard
Painted or powder-coated mild steel pipe and flights for cement, fly ash, fertilizer, lime, and standard industrial powder applications. Most economical configuration.
🍽️ SS 304 Food Grade
Stainless steel 304 pipe, screw, and end covers with polished 2B or mirror-finish interior. Food-grade mechanical seals. For flour, sugar, spices, milk powder, and food ingredients.
💊 SS 316 Pharma Grade
Electro-polished SS 316L with FDA-compliant mechanical seals and GMP end covers. Zero dead zones, easy-clean design. For pharmaceutical API and high-purity chemical powders.
⬆️ Inclined (up to 45°)
Optimised screw pitch and RPM for inclined conveying up to 45°. Custom intermediate hanger bearings for long inclined runs. Replaces separate horizontal and vertical transfer systems.
🌡️ High-Temperature Design
High-temperature bearing housings, heat-resistant shaft seals, and expansion joints in the pipe body for hot material conveying up to 200°C — cement clinker dust, hot fly ash, calcined materials.
⚡ VFD Variable Speed
Variable frequency drive on geared motor for precise TPH control from 10–100% of nominal throughput — essential for process-integrated dosing, metering, and batch feeding applications.
🔀 Multi-Inlet Configuration
Multiple flanged inlet ports along one tubular conveyor body — collecting material from several silo outlets or process discharge points into one transfer line without multiple separate conveyors.
🛡️ Hard-Faced Flights
Stellite or ceramic hard-facing on screw flight edges and pipe bore for highly abrasive materials — silica, quartz, slag dust — extending flight and pipe service life significantly versus standard MS.
Industries Using Tubular Screw Conveyor Systems
Every industry that handles fine powders, requires dust containment, operates at inclined angles, or must meet food/pharma hygiene standards specifies tubular screw conveyors as the correct engineering solution.
🏗️Cement Plants
Cement powder, fly ash, raw meal, and gypsum powder transfer between silos, grinding mills, and packing lines. MS with hard-faced flights for abrasion resistance. Enclosed design meets pollution control board dust emission standards without additional dedusting equipment on the conveyor body.
Cement powder screw conveyor → Troughed Belt Conveyor💨Power Plants & Fly Ash
Fly ash and bottom ash transfer from ESP hoppers, bag filter hoppers, and silo discharge to loading systems. Enclosed pipe prevents ash dust emission in the plant environment — critical for thermal power station PCB compliance. High-temperature variants for hot fly ash at 80–150°C.
Fly ash enclosed conveyor → Bucket Elevators🌾Food Processing
Flour, sugar, milk powder, spices, starch, and food ingredient conveying in SS 304/316 food-grade tubular screw conveyors. Polished interior, food-grade seals, and easy-clean end covers ensure contamination-free material handling compliant with FSSAI food safety standards.
Food grade screw conveyor → Belt Conveyors🔬Chemical Industry
Chemical fine powders, pigments, dyes, resins, and industrial salts — conveyed in fully enclosed MS or SS tubular screw conveyors that prevent personnel exposure to hazardous dusts and eliminate cross-contamination between product runs in multi-product chemical factories.
Chemical powder conveyor → All Screw Conveyors💊Pharmaceutical Plants
Pharmaceutical API, excipient granules, and tablet coating powders in SS 316L electro-polished tubular screw conveyors with FDA-compliant seals. GMP-validated design with no dead zones, easy strip-down cleaning, and full material containment throughout the conveying path.
Pharma GMP screw conveyor → Shaftless Conveyor🌱Fertilizer Industry
DAP, urea, potash, and NPK granule and powder transfer between production stages and bagging lines. Enclosed pipe prevents fertilizer dust exposure to operators. Corrosion-resistant paint or SS 304 construction for aggressive fertilizer environments in high-humidity plant conditions.
Fertilizer screw conveyor → Screw Conveyors🧴Plastic & Polymer
Plastic granules, polymer powder, and resin powder conveying — tubular design prevents granule abrasion-generated static dust from building up and eliminates contamination from ambient workshop environment. HDPE-lined or SS 304 construction for food-contact polymer applications.
Plastic granule conveyor → Powered Roller⛏️Mining & Minerals
Limestone powder, gypsum, calcium carbonate, silica flour, and mineral fine powder conveying at inclined angles between process stages. Hard-faced flights and wear-resistant pipe lining for highly abrasive mineral powder applications in mining and mineral processing plants.
Mineral powder conveyor → Troughed Belt ConveyorShare Material & Capacity — Get Free Screw Conveyor Design
Tell us your material name, bulk density, required TPH, conveyor length, inclination angle, and MOC requirement (MS/SS304/SS316). Our engineers will calculate screw diameter, RPM, motor power, and provide a GA drawing with the quotation — at no charge.
Tubular Screw Conveyor — Real Plant Installations by Neo Conveyors
Three representative projects — cement fly ash, food flour handling, and chemical powder transfer — showing the engineering decisions and operational results from each tubular screw installation.
Fly Ash Transfer — 200 mm Dia, 40 TPH, 12 m Inclined at 30°
A cement blending plant needed to transfer collected fly ash from a bag filter hopper to an elevated blending silo — 12 m run at 30° inclination, 40 TPH throughput, zero dust emission requirement to meet PCB environmental compliance. Previous open U-trough conveyor had failed to maintain dust containment on the inclined run, generating airborne ash contamination in the plant building.
Neo Conveyors designed a 200 mm diameter MS tubular screw conveyor — 30° inclined configuration with optimised variable-pitch flights for inclined efficiency, sealed end covers, sealed shaft bearings, 11 kW geared motor with VFD, full flanged connection to bag filter discharge and silo inlet. GA drawing approved before fabrication.
Wheat Flour Transfer — SS 304, 150 mm Dia, 8 TPH, Horizontal
A wheat flour milling facility needed to transfer milled flour between the output of two flour grinding mills and an elevated packing machine hopper — 8 m horizontal run, 8 TPH combined throughput, strict food-grade hygiene requirement for FSSAI compliance. Open U-trough conveyors had previously failed a food safety audit due to inadequate contamination control.
Neo Conveyors supplied a 150 mm SS 304 tubular screw conveyor — 2B polished internal bore, food-grade mechanical shaft seals, flanged access covers at both ends for cleaning, combined inlet hopper accepting discharge from both grinding mills, 5.5 kW geared motor with VFD for adjustable throughput. Full hygienic design documentation provided for FSSAI audit.
Chemical Powder Transfer — SS 316, 100 mm Dia, 3 TPH, with VFD
A fine chemical processing unit needed precise metered transfer of a classified hazardous chemical powder between a reactor discharge and a bagging station — 6 m horizontal run, 1–3 TPH variable dosing rate required, zero personnel dust exposure (material rated hazardous per MSDS), and stainless steel construction for corrosion resistance. Previous open system had failed factory safety inspection.
Neo Conveyors fabricated a 100 mm SS 316 tubular screw conveyor — electro-polished internal bore, mechanical shaft seal rated for hazardous powder duty, VFD-controlled geared motor for dosing rate adjustment from 1–3 TPH, fully flanged inlet and outlet connections sealed to upstream and downstream equipment, factory acceptance test before despatch.
Tubular Screw Conveyor — Industrial Buyer FAQs
Why Choose Neo Conveyors as Your Tubular Screw Conveyor Manufacturer?
Capacity Engineering First
Every tubular screw conveyor begins with a capacity calculation from your material bulk density, required TPH, pipe diameter, inclination, and fill ratio — before any dimension is finalised. A GA drawing is provided with every serious quotation. We do not sell off-the-shelf catalogue sizes. See all screw conveyor types →
MS to SS 316L — Full MOC Range In-House
We manufacture in Mild Steel, SS 304, and SS 316/316L with polished interiors and food-grade seals — all in-house at Ghaziabad. Hard-facing on flights for abrasive materials. No outsourcing of stainless steel fabrication — full quality control throughout. About Neo Conveyors →
Full Screw Conveyor Range — One Supplier
U-trough, tubular, vertical, shaftless, and inclined screw conveyors — plus belt, roller, bucket elevator, and chain conveyors — all manufactured in-house. One supplier for your entire plant material handling system from hopper to silo. All products →
PAN India — Our Own Engineers Install
Installation and commissioning by Neo Conveyors' own engineering team — including pipe alignment, flight clearance verification, seal installation, and VFD commissioning. No third-party contractors. Our team remains accountable after handover. Project gallery →
GA Drawing + AMC Support
Every order includes a General Arrangement drawing for plant layout integration. Annual Maintenance Contracts and spare parts (flights, seals, couplings, bearing housings) available after installation. Technical support →
Food-Grade Audit Documentation
Hygienic design documentation, material certificates, polish finish records, and seal compliance certificates provided for FSSAI, GMP, and FDA audit requirements — not available from most Indian screw conveyor manufacturers. Contact our team at +91-9654112235.
Learn More — Screw Conveyor & Powder Handling Technical Guides
Screw Conveyor Complete Guide — All Types & Selection
U-trough, tubular, vertical, shaftless, and inclined screw conveyors compared for industrial buyers in India — how to select the right type for your material.
Tubular Screw Conveyor Design Guide — MOC, Pitch & Inclination
How to specify the correct pipe diameter, screw pitch, MOC, and inclination angle for your powder handling application — from engineering first principles.
Conveyor Systems for Cement Plants — Complete Guide
Cement powder, fly ash, and clinker conveying — screw conveyor vs belt conveyor vs bucket elevator for Indian cement plant material handling.
Food Grade Screw Conveyor Guide — SS 304 vs SS 316
When to specify SS 304 vs SS 316 for food and pharma screw conveyors — MOC selection, surface finish requirements, and FSSAI compliance documentation.
Screw Conveyor vs Belt Conveyor — When to Use Which
How to decide between a screw conveyor and a belt conveyor for your plant's powder or bulk material handling requirement — the complete engineering comparison.
All Conveyor & Screw Conveyor Blogs
Browse all Neo Conveyors technical articles, installation guides, and material handling engineering resources.
Tubular Screw Conveyor Manufacturer Across India
Neo Conveyors supplies and installs tubular screw conveyor systems for cement plants, chemical factories, food processing facilities, fertilizer units, and pharmaceutical plants across all major industrial cities and states in India — from our Ghaziabad manufacturing facility.
Get a Tubular Screw Conveyor Design — Free Capacity Calculation
Share your material name, bulk density, required TPH, pipe length, inclination angle, and MOC requirement (MS/SS304/SS316). Our engineers will calculate screw diameter, RPM, motor power — and provide a GA drawing with a full no-obligation quotation.
