Disc Granulator Sizes & Material Guide (1m to 6m Models)

Choosing the right disc granulator (also known as a pan pelletizer) requires matching machine diameter and construction material with your raw material characteristics and output targets. As a versatile wet granulator, selecting the proper machine configuration directly impacts pellet quality, equipment lifespan, and initial equipment investment.

Direct Selection Summary: Diameters & Material Options

• Construction Material: Available in Carbon Steel (cost-effective for general organic compost) and Stainless Steel (SUS304/SUS316L) (essential for corrosive NPK chemical salts and high-moisture formulas).

• Small Sizes (1m – 2m): Ideal for pilot plants, lab testing, and small-scale organic fertilizer lines (0.5 to 2.5 TPH).

• Medium-to-Large Sizes (3m – 5m): Standard industrial models for medium-capacity fertilizer granulator machine lines (3 to 6 TPH per unit).

• Ultra-Large Output (6m Requirement): Instead of a single 6-meter pan, installing two 3-meter disc granulators in parallel provides superior pellet uniformity, lower maintenance costs, and better plant flexibility.

Disc Granulator Model & Size Specifications

Material Selection: Carbon Steel vs. Stainless Steel

• Carbon Steel Disc Granulators:

Engineered with heavy-duty structural steel and lined with high-density anti-stick rubber sheets or UHMW-PE liners. Best suited for non-corrosive organic fertilizers, fermented chicken manure compost, and bentonite cat litter.

• Stainless Steel Disc Granulators (SUS304 / SUS316L):

Built with corrosion-resistant stainless steel drum shells and spray manifolds. Essential for compound fertilizer granulator lines processing acidic, high-nitrogen, or salt-heavy NPK formulations that cause carbon steel to rust rapidly.

Engineering Insight: Why Two 3m Granulators Beat One 6m Granulator

When building a high-capacity fertilizer line requiring a 6-meter pan equivalent output (~10 TPH), engineering experts recommend installing two 3-meter disc granulators operating in parallel rather than a single massive 6-meter drum:

• Better Pellet Sphericity & Stability: Smaller 3m discs allow operators to fine-tune the inclination angle (35°~55°) and rotational speed precisely. Massive 6m pans often suffer from uneven liquid distribution, leading to inconsistent pellet sizing.

• Lower Equipment & Shipping Cost: A single 6m disc incurs extreme international freight fees due to over-gauge cargo limits. Dual 3m units pack standard containers easily, drastically lowering shipping CAPEX.

• Zero Downtime Flexibility: If one pan requires routine maintenance or spray nozzle cleaning, the second 3m unit continues operating at 50% plant capacity, eliminating total factory shutdown risks.

Frequently Asked Questions

Q: What is the benefit of choosing a stainless steel pan pelletizer over carbon steel?

A: Stainless steel (SUS304/316L) resists liquid chemical corrosion from urea, ammonium nitrate, and chloride salts. It prevents rust flaking, extends drum lifespan by 3x to 5x, and keeps finished granules contamination-free.

Q: Why is a parallel 2x3m disc setup recommended for 10 TPH lines instead of a single 6m unit?

A: Dual 3m disc granulators deliver higher pellet size uniformity, lower transport and maintenance costs, and operational redundancy, ensuring the production line never stops completely during maintenance.

Find the Right Disc Granulator Model for Your Plant

Gofine manufactures complete series of disc granulators from 1-meter lab models to large-scale 3-meter parallel configurations in both carbon steel and stainless steel.

Contact our engineering team today for model specifications, custom CAD layouts, and direct factory quotes on our wet granulator series!