Industrial Screw Conveyors
Engineered for Horizontal, Incline, Vertical & Live‑Bottom Service
From dosing powders to moving abrasive minerals, we design and build screw conveyors tailored to your material, capacity, and layout—shafted or shaftless, carbon or stainless, food‑grade or heavy‑duty.
Why Screw Conveyors?
- Versatile layouts: horizontal, inclined, vertical, or live‑bottom under bins and silos.
- Handles nearly any bulk solid: powders, granules, pellets, flakes, sludges.
- Dust‑tight & safe: covered housings, guards, and interlocks to suit.
- Material‑matched builds: carbon, stainless, AR plate, ceramic‑coated, UHMW‑lined.
- Low maintenance: proven components, centralized drives, easy access for service.
How We Engineer Your Conveyor
We size screws around your material and process. Critical variables include:
- Material Bulk density, flowability, abrasiveness, corrosiveness, max lump size, temperature, moisture.
- Capacity Required rate (ft³/hr or tph), surge factor, feeder vs. transfer duty, duty cycle.
- Geometry Length, incline angle, number of inlets/outlets, clearances, and supports.
- Screw Diameter, pitch, flight thickness, ribbon vs. solid flight, shafted vs. shaftless, hanger spacing.
- Trough U‑trough or tubular, covers, liners (AR, UHMW, ceramic), inspection doors.
- Drive Horsepower/torque, reducer style, end vs. center drive, speed control, safety.
Configurations
Efficient Transfers & Metering
Most common and efficient orientation. Ideal for controlled feed from hoppers, mixers, or weigh systems with minimal power draw.
Up to Vertical with Derating
As angle increases, so does slip and backflow. We adjust diameter, pitch, and speed—or add internal flights/inserts—to maintain capacity.
Compact Elevation
For tight footprints and high lifts. Tubular housings, close clearances, and robust drives ensure reliable vertical conveying.
Mass Flow from Bins & Silos
Multiple parallel screws draw material uniformly to prevent bridging and rat‑holing—great for difficult, cohesive products.
Hygienic Construction
Stainless steel contact surfaces, rounded/ground welds, drip and drain management, quick‑release covers, and clean‑out ports for fast changeovers.
Sticky, Stringy, or Abrasive
Shaftless for sludges and stringy materials; ribbon, cut‑and‑folded, or hard‑faced flights for heating/cooling, mixing, or abrasion resistance.
Materials of construction: carbon, 304/316 stainless, AR plate; liners in AR, UHMW, or ceramic; optional explosion‑venting, purge, or ATEX/NFPA compliance as required.
Capacity & Sizing Notes
| Screw Ø (in) | Typical Pitch | Indicative Range (ft³/hr) | Common Uses |
|---|---|---|---|
| 6–9 | Full or 2/3 | 80–600 | Loss‑in‑weight feeds, short transfers |
| 12 | Full | 600–1,800 | General duty powders/granules |
| 16 | Full | 1,800–4,000 | Higher‑rate transfers, pellets |
| 20+ | Full | 4,000–10,000+ | Long runs, aggregates, high‑throughput |
Actual capacity depends on material, fill, speed, trough type, and incline. We apply incline derating and horsepower checks per engineering guidelines.
Applications
Food ingredients (flour, sugar, salt, starch), plastics (pellets, regrind), chemicals (powders, additives), minerals (lime, cement, sand), and waste streams (sludge, screenings). From batching and metering to long‑distance transfers and high‑lift elevation.
Components & Flighting Options
FAQ
How does incline affect capacity?
As incline increases, product tends to fall back between flights. We compensate with larger diameter, modified pitch, higher speed, or internal inserts—and apply horsepower checks to avoid overloading.
When should I use shaftless screws?
For sticky, viscous, or stringy materials (e.g., sludges, screenings) that would wrap a center shaft. Shaftless designs use liners and thicker flights for durability.
What materials of construction are available?
Carbon steel, 304/316 stainless, AR plate; liners in UHMW, AR, or ceramic. We match metallurgy and hardness to abrasiveness and corrosion.
Can screws meter accurately?
Yes—when paired with VFD control and weigh/volumetric feeders. For high‑precision, we integrate dedicated feeders ahead of the conveyor.