Stable Duck Feed Pellet Production in India: How a West Bengal Feed Mill Achieved Consistent Quality with Hongyang Ring Die Pellet Mill

Stable Duck Feed Pellet Production in India: How a West Bengal Feed Mill Achieved Consistent Quality with Hongyang Ring Die Pellet Mill

Executive Summary

India’s poultry feed sector, valued at INR 955.3 billion in 2024 and growing at a CAGR of 3.23% (IMARC Group, 2025), has been undergoing rapid modernization. While broiler and layer segments dominate the national conversation, duck farming represents a significant yet underserved niche. India is home to approximately 33 million ducks, concentrated primarily in West Bengal, Kerala, Assam, and Odisha, where duck rearing is integral to rural livelihoods and regional food culture.

In early 2025, a medium-scale integrated duck feed producer in West Bengal’s Nadia district partnered with Liyang Hongyang Feed Machinery Co., Ltd. to upgrade its pelleting line. The operation relied on a locally manufactured pellet mill that had suffered chronic issues: inconsistent pellet hardness, excessive fines (8-12%), and die replacement every 400-500 metric tons. After installing a Hongyang HYPM series ring die pellet mill and a customized ring die, the facility achieved stable output of 5 tons per hour (TPH), pellet durability index (PDI) exceeding 98.5%, and ring die service life surpassing 3,000 metric tons per die. This article examines how Hongyang’s ring die technology and engineering support transformed the operation’s production stability and feed quality.

The India Duck Feed Opportunity

India produced 57.729 million metric tons of compound feed in 2025, ranking fourth globally with a year-on-year increase of 4.5% (Alltech Agri-Food Outlook, 2026). The poultry segment alone accounts for approximately 45% of compound feed sales in India, driven by intensive broiler and layer operations (Mordor Intelligence, 2025). The Indian animal feed pellet mill market is estimated at USD 150 million, growing at 6.8% CAGR, with ring die pellet mills representing the dominant segment at USD 600 million globally (Strategic Revenue Insights, 2025).

Duck farming occupies a unique position within this landscape. Unlike broiler and layer production, duck feed requires distinct nutritional and physical characteristics. Duck feed formulations typically include higher fiber content from rice bran and wheat middlings, medium protein levels (16-18% crude protein for growing ducks), and a pellet diameter range of 3-5 mm depending on bird age. West Bengal alone accounts for over 40% of India’s duck population, creating concentrated demand for specialized feed manufacturing capacity.

The Production Challenge

The West Bengal facility operates a 5 TPH pelleting line serving approximately 120 contract duck farmers across three districts. Prior to the upgrade, the operation faced three interconnected challenges:

Inconsistent Pellet Quality. The existing ring die, sourced from a domestic supplier, exhibited uneven die-hole wear after approximately 400 metric tons of throughput. This resulted in pellet diameter variation exceeding 0.5 mm from target specifications, directly affecting feed intake uniformity across bird populations. Fines content in finished feed routinely exceeded 8%, with peak measurements reaching 12% during high-humidity monsoon months — a critical quality failure for waterfowl feed, where pellet buoyancy and water stability matter for duck feeding behavior.

Low Die Service Life. The facility consumed 8-10 ring dies per year at an average replacement cost of approximately INR 85,000 (USD 1,020) per die. Frequent die changes imposed 4-6 hours of downtime per replacement cycle, translating to roughly 40-50 lost production hours annually.

Inadequate Technical Support. When production issues arose — particularly during seasonal formulation adjustments between summer and monsoon feedstock — the previous supplier offered no remote or on-site diagnostic support. The mill’s production manager described the situation as “operating blind,” with no systematic approach to matching compression ratio, die-hole configuration, and raw material characteristics.

The Hongyang Solution

Hongyang’s engineering team conducted a comprehensive on-site assessment in November 2024 before proposing a solution. The assessment covered raw material particle size distribution, typical moisture profiles (12-14% in corn-soybean meal base mix, rising to 15-16% during monsoon), and target production parameters.

Ring Die Configuration

Based on the facility’s duck feed formulation — which includes 45% corn, 20% soybean meal, 15% rice bran, 10% wheat middlings, and 10% premix and minerals, with a target pellet diameter of 3.5 mm for grower-stage ducks — Hongyang recommended an alloy steel ring die with:

- Effective compression ratio (L/D) of 8.5:1, calibrated for the medium fiber content and moderate oil inclusion (2-3%) characteristic of duck grower feed. Hongyang’s engineers explained that while broiler feed typically uses compression ratios of 7:1 to 9:1, duck feed benefits from the upper end of this range due to the higher fiber fraction, which requires additional compression to achieve adequate pellet binding.
- Die-hole configuration optimized for uniform feed distribution across the die face, reducing localized wear that had driven the predecessor die’s premature failure.
- Vacuum heat treatment achieving surface hardness of HRC 58-62, ensuring wear resistance appropriate for India’s tropical operating environment.

HYPM Pellet Mill Integration

The HYPM508 ring die pellet mill replaced the existing unit with a direct-coupled gearbox drive system rated at 132 kW. The pellet mill’s conditioner — a double-shaft design with 180-second retention time capability — was configured to maintain mash temperature at 80-85°C, sufficient for starch gelatinization without risking heat-sensitive vitamin degradation. Steam conditioning is critical for duck feed: adequate gelatinization improves pellet water stability, a parameter that matters for duck feeding in semi-aquatic environments.

Hongyang’s team also supplied a matched pair of roller shells with the ring die, manufactured to concentricity tolerance within 0.05 mm, ensuring uniform pressure distribution across the die face during operation.

Installation and Commissioning Support

A Hongyang service engineer spent five days on-site in January 2025 for installation supervision, alignment verification, and operator training. The commissioning protocol included:
- Die break-in procedure with a high-oil (4%) soybean meal mixture for the first four hours
- Real-time amperage monitoring calibration
- Roller gap adjustment training at 0.2-0.3 mm clearance
- Production log documentation for tracking die wear and PDI trends

Results: Stable Production and Superior Feed Quality

Six months post-installation, the facility’s production data demonstrates measurable improvements across all key performance indicators:

| Parameter | Before (Domestic Die) | After (Hongyang Die) | Improvement |
|———–|———————-|———————|————-|
| Average Output | 3.8-4.2 TPH | 5.0-5.2 TPH | +22% |
| Pellet Durability Index (PDI) | 88-92% | 98.2-98.6% | +8 percentage points |
| Fines Content | 8-12% | 1.2-1.8% | -85% |
| Ring Die Service Life | 400-500 MT | 3,100 MT and counting | +540% |
| Die Replacement Cost/Year | INR 765,000 | INR 85,000 (est.) | -89% |
| Annual Downtime from Die Changes | 40-50 hours | ~8 hours (est.) | -82% |

Data collected from April-May 2026 production logs. PDI measured per ASAE S269.4 standard.

The most significant operational outcome has been production stability. The facility’s production manager reported: “Before the upgrade, every die change meant re-calibrating roller gaps, adjusting steam pressure, and losing half a shift to dial in quality. With the Hongyang die, we install it, follow the break-in procedure, and the machine runs at spec from hour six onward. That predictability alone is worth the investment.”

Feed quality consistency has translated to measurable downstream benefit. The mill’s contract farmers reported improved feed conversion ratio (FCR) in their grower duck flocks — from approximately 3.2:1 to 3.0:1 — attributed to reduced fines and more uniform pellet size, which minimized sorting behavior and feed wastage in pond-based feeding systems typical of West Bengal duck farming.

Conclusion

This case demonstrates that pellet quality consistency in duck feed production is not solely a function of formulation — it depends critically on ring die engineering, compression ratio selection, and the precision of the die-roller interface. Hongyang’s integrated approach — combining on-site feedstock analysis, customized die configuration, matched roller shells, and commissioning support — enabled a mid-scale Indian duck feed mill to eliminate its core production bottleneck while reducing per-ton die cost by nearly 90%.

For feed producers operating in niche poultry segments where pellet physical quality directly impacts animal performance, the lesson is clear: ring die selection is not a commodity procurement decision. It is an engineering partnership that determines whether a pelleting line runs at spec or constantly underperforms.

References
- IMARC Group. “India Poultry Feed Market Size, Growth and Outlook 2033.” 2025. https://www.imarcgroup.com/india-poultry-feed-market
- Alltech. “2026 Agri-Food Outlook.” April 2026. https://www.alltech.com/agri-food-outlook/results
- Strategic Revenue Insights. “Animal Feed Pellet Mills Market Size, Future Growth and Forecast 2033.” February 2025. https://www.strategicrevenueinsights.com/industry/animal-feed-pellet-mills-market
- Mordor Intelligence. “India Compound Feed Market Report.” 2025. https://www.mordorlabs.com/industry-reports/india-compound-feed-market
- Baidu Baike. “环模压缩比 (Ring Die Compression Ratio).” https://baike.baidu.com/item/环模压缩比/1810146