Impeller/Paddle: Diameter 100-2000 mm, Flow Rate Up to 500 m³/h

Component Specifications

Definition

An impeller or paddle is a critical rotating element within agitation systems, designed with specific blade geometries to create fluid motion through centrifugal force, axial flow, or radial displacement. It converts mechanical energy from a drive shaft into kinetic energy within the fluid, enabling homogeneous mixing, heat transfer, particle suspension, or chemical reaction enhancement in industrial processes.

Working Principle

Operates by rotating within a fluid medium, where blade design determines flow patterns: radial impellers discharge fluid perpendicular to the shaft for high shear; axial impellers move fluid parallel to the shaft for high flow; and specialized paddles create folding or sweeping actions. The rotation generates velocity gradients and turbulence, ensuring uniform distribution of components.

Materials

Typically constructed from stainless steel (AISI 304/316 for corrosion resistance), carbon steel, Hastelloy, titanium, or engineered polymers (PTFE, polypropylene) depending on chemical compatibility, temperature, and abrasion requirements. Coatings like ceramic or rubber may be applied for wear protection.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	100-2000 mm
Flow Rate	Up to 500 m³/h
Blade Count	2-6 blades
Pressure Head	0.1-10 bar
Rotation Speed	50-1500 RPM
Power Requirement	0.5-50 kW

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 2858, DIN 28131, ASME B73.1

Parent Products

This component is used in the following industrial products

Agitation Mechanism

A mechanical system designed to mix and homogenize yogurt culture and milk within a fermentation tank.

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Agitator/Stirrer Assembly

Motor-driven shaft with impellers for controlled agitation in crystallization vessels.

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Engineering Analysis

Risks & Mitigation

Cavitation due to improper speed
Imbalance causing vibration
Corrosion or erosion failure
Fouling reducing efficiency

FMEA Triads

Trigger: Material fatigue from cyclic loading
Failure: Blade fracture leading to system shutdown
Mitigation: Regular inspection, use of fatigue-resistant alloys, and stress analysis during design

Trigger: Improper installation alignment
Failure: Excessive wear on shaft and bearings
Mitigation: Follow manufacturer torque specifications, use alignment tools, and conduct vibration monitoring

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerance per ISO 2768-m, balance to G6.3 per ISO 1940

Test Method

Performance testing per ISO 9104 for flow rate and power draw; material certification to ASTM/EN standards

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Impeller/Paddle

Manufacturer profiles associated with Impeller/Paddle.

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Frequently Asked Questions

What is the difference between an impeller and a paddle?

Impellers typically have curved blades optimized for pumping or high-shear mixing, while paddles have flat or angled blades for gentle blending or folding actions in viscous fluids.

How do I select the right impeller material?

Consider fluid chemistry (corrosiveness), temperature, abrasion from particles, and hygiene requirements. Stainless steel is common for general use, while polymers suit corrosive environments.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Impeller/Paddle