Internal Lifters (Fights): Height 10–25% of drum diameter

Component Specifications

Definition

Internal lifters, commonly referred to as flights, are critical components installed along the inner wall of rotary granulation drums. These strategically angled plates lift bulk materials (powders, seeds, or nuclei) as the drum rotates, creating a cascading curtain that ensures even distribution of binding agents, coatings, or active ingredients. They optimize particle movement, enhance mixing efficiency, and promote uniform granule growth through controlled tumbling and attrition.

Working Principle

As the rotary drum rotates, the angled lifters scoop and elevate material from the bottom. Upon reaching a critical height, gravity causes the material to fall back in a cascading curtain, exposing particles uniformly to spray systems or other granules. This continuous lift-and-cascade action ensures homogeneous coating, agglomeration, and drying.

Materials

Typically 304 or 316L stainless steel for corrosion resistance; sometimes carbon steel with food-grade or chemical-resistant coatings. Surface finishes range from mill finish to polished (Ra ≤ 0.8 μm) for hygiene-sensitive applications.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Height	10–25% of drum diameter
Spacing	0.5–1.5 times lifter height
Thickness	3–10 mm
Lifter Angle	30° to 60° (adjustable)
Mounting Type	Welded or bolted
Surface Area Coverage	15–40% of drum interior

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 9001, DIN 28018, GMP guidelines

Parent Products

This component is used in the following industrial products

Rotary Granulation Drum

A rotating cylindrical vessel where urea melt is sprayed onto seed particles and solidified into granules through cooling and tumbling action.

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Engineering Analysis

Risks & Mitigation

Material buildup reducing efficiency
Wear from abrasive materials
Improper angle causing uneven granulation
Corrosion in humid or chemical environments

FMEA Triads

Trigger: Abrasive particle contact
Failure: Lifter thickness reduction leading to structural weakness
Mitigation: Use wear-resistant materials (e.g., hardened steel liners) and regular thickness inspections

Trigger: Moisture or chemical exposure
Failure: Corrosion or pitting compromising hygiene or strength
Mitigation: Specify stainless steel grades (316L for chlorides) and apply protective coatings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±1° angle deviation, ±2 mm positional accuracy

Test Method

Drum rotation simulation with tracer particles; coating uniformity tests via spectrophotometry or weight gain analysis

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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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Internal Lifters (Fights)

Manufacturer profiles associated with Internal Lifters (Fights).

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Frequently Asked Questions

How do lifter angles affect granulation?

Steeper angles (e.g., 60°) create higher cascades for intense mixing, while shallower angles (e.g., 30°) promote gentle rolling, ideal for fragile granules or coating processes.

Can lifters be replaced without drum disassembly?

Yes, bolted designs allow replacement through drum access doors; welded versions require internal welding or full drum entry.

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.

Internal Lifters (Fights)