Structured Manufacturing Data (2026)

Scroll conveyor

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Scroll conveyor used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Scroll conveyor is characterized by the integration of Conveyor Hub and Helical Flight. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless steel (e.g., 316L, 304) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A helical component within a centrifuge that moves separated solids along the bowl wall for discharge.

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Product Specifications

Technical details and manufacturing context for Scroll conveyor

Definition

The scroll conveyor is a critical internal component of a decanter centrifuge, consisting of a helical screw that rotates at a differential speed relative to the centrifuge bowl. Its primary function is to continuously convey the separated solid phase (sediment) along the conical section of the bowl towards the discharge ports, enabling continuous operation of the centrifuge.

Working Principle

The scroll conveyor rotates at a slightly different speed (typically 5-50 RPM slower) than the centrifuge bowl. This differential speed creates a relative motion that 'scrolls' or pushes the settled solids along the inner wall of the bowl. The helical flights of the conveyor provide the mechanical force to transport the solids against centrifugal force and friction.

Common Materials

Stainless steel (e.g., 316L, 304), Hard-surfaced alloy steel (e.g., tungsten carbide coated)

Technical Parameters

Outer diameter of the scroll conveyor, matching the inner diameter of the centrifuge bowl. (mm) Per Request

Components / BOM

Conveyor Hub Part
Central shaft that transmits torque and supports the helical flights.

Material: Forged steel
Helical Flight Part
Spiral blade that contacts and conveys the separated solids.

Material: Hard-surfaced steel
Feed Zone Section Part
Initial section of the conveyor where feed slurry is introduced.

Material: Stainless steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Scroll conveyor.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Centrifuge

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Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Downstream Applications

Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits

pressure:	Atmospheric to 10 bar (dependent on centrifuge design)
flow rate:	5-500 m³/h (dependent on scroll diameter and pitch)
temperature:	-20°C to 150°C (dependent on material of construction)
slurry concentration:	Up to 60% solids by weight

Media Compatibility

✓ Municipal wastewater sludge ✓ Chemical process slurries ✓ Food processing waste

Unsuitable: Highly abrasive materials (e.g., silica sand, metal shavings) without hardened wear protection

Sizing Data Required

Solids throughput (kg/h dry solids)
Bowl diameter and scroll pitch (mm)
Slurry feed characteristics (density, viscosity, particle size distribution)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Bearing seizure or excessive wear

Cause: Inadequate lubrication, contamination ingress (dust, moisture), or misalignment leading to uneven load distribution and overheating.

Scroll flight damage or deformation

Cause: Material buildup causing over-torque, foreign object intrusion, or fatigue from cyclic loading and abrasive material flow.

Maintenance Indicators

Unusual grinding or screeching noises from drive or bearing housings
Visible wobble or misalignment during operation, or erratic motor current spikes

Engineering Tips

Implement condition-based lubrication using automated systems and monitor vibration trends to detect early bearing degradation.
Install wear-resistant flight liners or coatings, and use torque monitoring with automatic shutdown to prevent overload damage.

Compliance & Manufacturing Standards

Reference Standards

ISO 5049-1:1994 - Continuous mechanical handling equipment - Safety requirements for belt conveyors ANSI/CEMA 402-2003 - Belt Conveyors DIN 15207-1:2010 - Continuous conveyors - Belt conveyors for loose bulk materials - Basics for calculation and dimensioning

Manufacturing Precision

Chain pitch tolerance: +/-0.5% of nominal pitch
Shaft alignment: +/-0.1mm per meter of conveyor length

Quality Inspection

Non-destructive testing (NDT) of welds using magnetic particle inspection
Load testing to verify structural integrity under maximum rated capacity

Factories Producing Scroll conveyor

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What materials are best for scroll conveyors in corrosive environments?

For corrosive environments, 316L stainless steel offers excellent corrosion resistance, while tungsten carbide coated alloy steel provides superior wear resistance for abrasive applications.

How does the helical flight design affect solids discharge efficiency?

The helical flight's pitch and geometry are optimized to move separated solids along the centrifuge bowl wall with minimal energy consumption while preventing clogging and ensuring consistent discharge rates.

What maintenance is required for scroll conveyor components?

Regular inspection of the helical flight for wear, checking the conveyor hub alignment, and monitoring the feed zone section for buildup are essential. Hard-surfaced alloys typically require less frequent replacement than standard steels.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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