Tubular Screw Conveyor Manufacturer in India
Tubular Screw Conveyor Manufacturer in India
Fully enclosed cylindrical design for dust-free, contamination-free conveying of powders and granules. Flour, cement, spices, chemical powders, fertilizer, mineral powders. MS, SS304, SS316. Horizontal, inclined, and vertical configurations. Fabricated in Ghaziabad, PAN India installation.
- Fully enclosed, dust-tight
- 150–300 mm diameter
- 0°–90°, any inclination
FIG. 01 — TUBULAR SCREW CONVEYOR, GENERAL ARRANGEMENT
What Is a Tubular Screw Conveyor?
A tubular screw conveyor uses a helical screw rotating inside a fully enclosed cylindrical tube, giving complete dust containment, contamination prevention, and the ability to convey at any angle from horizontal to vertical, without material escaping to atmosphere.
Fully Enclosed — the Defining Feature
The key engineering difference between a tubular screw conveyor and a U-trough screw conveyor is the complete cylindrical enclosure. In a U-trough, the screw sits in an open-topped trough covered by a flat plate, with joints, inspection openings, and gaps at inlets and outlets where dust can escape. In a tubular conveyor, the screw is enclosed in a seamless tube, the only openings are the flanged, gasketed inlet and outlet connections. This is why tubular conveyors are specified for flour mills, spice processing, chemical plants, and pharma, wherever dust emission is a PCB compliance issue or a hygiene concern.
Any Angle — Horizontal, Inclined, or Vertical
U-trough conveyors are limited to near-horizontal installation, incline above 20° causes material to slide back, reducing capacity significantly. Tubular conveyors are not limited by inclination since the enclosed tube fully contains material regardless of angle. This makes them the preferred choice for multi-floor layouts where material must be elevated between levels without a separate bucket elevator or pneumatic system.
Free capacity calculation included: share your material name, bulk density, required TPH, conveyor length, and inclination angle. Our engineers calculate tube diameter, screw pitch, speed, and motor power, and send a GA drawing with quotation at no charge. Send material details →
How a Tubular Screw Conveyor Works
Four stages, from material inlet to discharge, all within a sealed cylindrical enclosure that prevents any dust or product from escaping to atmosphere.
Material enters at sealed inlet
Fed at the inlet flange, bolted and gasketed to upstream equipment for a dust-tight connection.
Screw rotates inside the sealed tube
The helical flight pushes material forward with each rotation; tube bore is 5–10 mm larger than flight OD.
Material conveyed at rated capacity
Controlled by screw speed, pitch, and filling degree, typically 40–60% of tube cross-section, calculated free with every quotation.
Discharge through sealed outlet
Flanged and gasketed to downstream equipment, zero dust emission from inlet to outlet.
Advantages of Tubular Screw Conveyors
Six engineering advantages that make the tubular type preferred for dust control, hygiene, and multi-angle conveying.
Dust-Free Conveying
Complete cylindrical enclosure, zero dust emission from inlet to outlet, critical for PCB and FSSAI compliance.
Compact Design
Smaller footprint than equivalent U-trough conveyors; can route through walls and floors.
Reduced Material Loss
Complete sealing eliminates loss at joint gaps, significant for expensive materials.
Low Maintenance
No exposed moving parts; only sealed bearing housings need periodic lubrication.
Safe Material Handling
Full enclosure eliminates worker exposure to hazardous dusts, silica, chemical powders, cement dust.
Any Inclination Angle
One tubular conveyor can replace both a horizontal screw conveyor and a separate elevator.
Applications of Tubular Screw Conveyors
Food Processing
Flour, semolina, starch, sugar, salt. SS304 with food-grade seal and polished bore.
Chemical Industry
Powders, pigments, dyes, calcium carbonate, talc. SS316 for corrosive chemicals.
Pharmaceutical Industry
API and excipient powder in GMP environments. SS316L, electro-polished bore.
Cement Industry
Cement powder, raw meal, fly ash, limestone at raw mill, kiln, and packing plant.
Fertilizer Plants
Urea, DAP, NPK; sealed construction prevents moisture ingress.
Powder Handling Systems
Gypsum, barite, silica, calcium carbonate in mining and mineral processing.
Materials Handled
Cement Powder
Bulk density 1.0–1.5 t/m³. Air purge seal.
Fly Ash
Low bulk density 0.6–0.9 t/m³. Dust-tight design.
Flour
SS304 polished bore, pest-proof for FSSAI compliance.
Spices
SS304 food-grade, flanged covers for easy cleaning.
Chemical Powders
SS316 for aggressive chemicals; Ex-proof motor available.
Mineral Powders
Complete silica dust enclosure for occupational compliance.
Fertilizers
Sealed against moisture ingress for hygroscopic materials.
Salt & Sugar
SS304 with food-safe seals, pest and moisture protection.
Not suitable for: highly sticky, wet, or high-viscosity materials that pack in the tube bore, or very large lumps above 30 mm. A U-trough screw conveyor suits these instead. Our engineers confirm suitability at no charge.
Technical Specifications
| Conveyor type | Tubular, fully enclosed cylindrical tube |
|---|---|
| Tube bore diameter | 150 / 200 / 250 / 300 mm (custom on request) |
| Conveyor length | Up to 15 m per section; multi-section for longer runs |
| Inclination | 0° (horizontal) to 90° (vertical) |
| Screw speed | Typically 30–120 RPM, calculated per capacity |
| Filling degree | 40–60% horizontal; 25–35% inclined; 15–20% vertical |
| Tube thickness | 3 mm to 8 mm, per abrasiveness and pressure |
| Shaft seals | Stuffing box / mechanical seal / air purge, per material |
| Inlet/outlet | Flanged and gasketed, dust-tight connection |
| Power supply | 415 V, 3 Phase, 50 Hz |
Construction Materials
Drive Systems
- Cement powder
- Fly ash
- Wheat flour
- Rice flour
- Ground spices
- Salt & sugar
- Chemical powder
- Pigments & dyes
- Calcium carbonate
- Gypsum powder
- Fertilizer powder
- Pharma excipients
How to Select the Right Tubular Screw Conveyor
Four parameters our engineers use to specify tube diameter, screw pitch, material, and drive.
Share 4 parameters, material name, bulk density, required TPH, and conveyor length and inclination angle, and our engineers return tube diameter, screw pitch, speed, motor power, and a GA drawing at no charge. Submit requirements →
Tubular Screw Conveyors — Live at Customer Plants
Real Neo Conveyors screw conveyor systems in operation, flour mill, chemical, and powder handling installations across India.
Watch on YouTubeTubular Screw Conveyor vs U-Trough Screw Conveyor
| Feature | Tubular (this page) | U-Trough |
|---|---|---|
| Dust control | Excellent, complete enclosure | Good, some gaps possible |
| Hygiene | Excellent, sealed surfaces | Moderate, cover joints |
| Inclination range | 0° to 90° | 0° to ~20° |
| Cleaning access | Moderate, flanged sections | Excellent, lift cover plate |
| Sticky material | Not suitable | Better, self-clears |
| Large lump material | Not suitable | Better, accommodates lumps |
| Best applications | Flour, spices, chemical, pharma, cement dust | Grain, wet cake, sludge |
Need a U-trough for sticky or large-lump material? U-Trough Screw Conveyor →
Recent Tubular Screw Conveyor Installations
Flour Mill — SS304 Wheat Flour Transfer
8 m horizontal, roller mill to sifter, food-grade SS304 with polished bore and CIP connection.
- Zero flour dust, FSSAI audit passed
- CIP cleaning in 15 min between grades
Chemical Plant — MS Calcium Carbonate
12 m horizontal, ball mill to storage silo, air purge seals for PCB-compliant dust control.
- PCB dust: 0.02 mg/m³ vs 10 mg/m³ limit
- VFD saves energy off-peak
Spice Unit — SS304 Inclined Transfer
6 m at 30° incline, grinder to blender, removable inlet for changeover cleaning.
- Replaces separate conveyor + elevator
- Changeover cleaning in 20 min
Fertilizer Plant — MS Urea Transfer
10 m horizontal, silo to blender, SS internals and moisture-resistant seals prevent caking.
- Urea caking eliminated completely
- 18 months, no internal maintenance
Why Choose Neo Conveyors?
Custom Engineering Since 2007
Tube diameter, screw pitch, seal type, and construction material calculated from your material data.
1,000+ Installations
18+ years across flour mills, chemical plants, spice processing, pharma, cement, fertilizer.
MS, SS304 & SS316 In-House
All construction materials fabricated in-house; polished bore and GMP documentation available.
PAN India, Own Engineers
Installation, alignment, seal fitting, and commissioning by our own engineers, no third-party contractors.
GA Drawing With Every Quotation
Tube diameter, screw pitch, flange positions, and drive details, at no charge.
Spares & AMC Support
Replacement flights, seals, and bearings stocked; AMC and inspection visits available.
Frequently Asked Questions
What is a tubular screw conveyor?
A tubular screw conveyor uses a helical screw rotating inside a fully enclosed cylindrical tube, unlike a U-trough screw conveyor where the screw sits in an open-topped trough covered by a flat plate. The complete cylindrical enclosure gives dust-tight, contamination-free conveying at any inclination, horizontal, inclined, or fully vertical, without material escaping to atmosphere at joints or gaps.
What is the difference between a tubular and a U-trough screw conveyor?
Tubular conveyors are completely enclosed, dust-tight, weatherproof, and suitable for any inclination angle, ideal for flour, spices, chemical powders, pharma, and cement. U-trough conveyors have an open-top trough with a flat cover plate, easier to inspect and clean, better for sticky or high-moisture materials, but limited to near-horizontal installation under about 20 degrees.
What materials can tubular screw conveyors handle?
Cement powder, fly ash, wheat flour, rice flour, maize flour, semolina, ground spices, sugar, salt, chemical powders, fertilizer powder, mineral powders, pigments, and pharma excipients, any free-flowing dry powder or granule fine enough to fit through the clearance between screw flight and tube bore.
What diameter options are available?
Standard tube diameters of 150 mm (up to about 2 TPH), 200 mm (up to about 5 TPH), 250 mm (up to about 12 TPH), and 300 mm (up to about 25 TPH) at horizontal installation and 0.8 t/m³ bulk density. Actual capacity for your material and inclination is calculated by our engineers.
Are stainless steel tubular screw conveyors available?
Yes, in MS, SS304, and SS316. SS304 is standard for food processing, dairy, and pharma applications, polished bore available on request with FSSAI/GMP documentation. SS316 suits more corrosive chemical applications, marine environments, or pharma requiring higher chloride resistance.
Can a tubular screw conveyor convey material vertically?
Yes, one of the key advantages over U-trough conveyors is the ability to convey at any inclination from horizontal to fully vertical. At higher inclinations, filling degree is reduced, meaning a larger tube diameter or faster screw speed is needed to achieve the same TPH.
Do you provide installation support across India?
Yes, PAN India installation and commissioning by Neo Conveyors' own engineers, serving flour mills in Punjab, Haryana, and UP; spice processing in Rajasthan and MP; chemical plants in Gujarat and Maharashtra; fertilizer plants in Gujarat; cement plants in Rajasthan, AP, and MP; and pharma plants across India. Lead time is 3–5 weeks from order confirmation.
What is the price of a tubular screw conveyor in India?
Price depends on tube diameter, conveyor length, material of construction (MS/SS304/SS316), inclination, shaft seal type, and drive motor specification. Contact Neo Conveyors at +91-9654112235 for a no-obligation quotation.
Tubular Screw Conveyor — Service Locations Across India
Manufactured at our Ghaziabad facility, installed and commissioned by our own engineers at flour mills, chemical plants, spice processors, fertilizer plants, and pharma facilities across all Indian states.
Uttar Pradesh
Ghaziabad (HQ), Noida, Greater Noida, Lucknow, Kanpur, Agra, Meerut, Moradabad, Mathura, Aligarh, Bareilly, Gorakhpur, Varanasi, Sahibabad
Delhi NCR & Haryana
New Delhi, Gurugram, Faridabad, Manesar, Bhiwadi, Bawal, Sonipat, Panipat, Ambala, Hisar, Karnal, Yamunanagar
Punjab & HP/Uttarakhand
Ludhiana, Amritsar, Jalandhar, Patiala, Bathinda, Mohali, Baddi, Solan, Haridwar, Roorkee, Rudrapur, Dehradun
Rajasthan & Gujarat
Jaipur, Jodhpur, Udaipur, Kota, Ajmer, Alwar, Ahmedabad, Surat, Vadodara, Rajkot, Bharuch, Vapi, Mundra
Maharashtra & MP/Chhattisgarh
Mumbai, Pune, Nagpur, Nashik, Aurangabad, Thane, Indore, Bhopal, Jabalpur, Pithampur, Raipur
South & East India
Hyderabad, Chennai, Bangalore, Coimbatore, Kochi, Visakhapatnam, Kolkata, Howrah, Bhubaneswar, Patna, Ranchi, Jamshedpur
Request a Free Quote — GA Drawing Included
Share your material name, bulk density, required TPH, conveyor length, inclination, and hygiene requirement. Our engineers calculate tube diameter, screw pitch, and motor power, GA drawing included within 24–48 hours.
