1. Stainless steel feeder with variable pitch anti-bridging mechanism and frequency conversion speed control for feeding amount;
2. Extended stainless steel reinforced conditioner with a special steam inlet method, significantly improving conditioning and maturation time and effect;
3. Main transmission parts use high-quality SKF bearings and imported oil seals;
4. Main drive is a high-precision gear drive, the ring die uses a quick-release clamp type, and a compensated serpentine spring coupling, resulting in high transmission efficiency;
5. The door cover and inclined groove are made entirely of stainless steel, ensuring a long service life;
6. Equipped with overload protection device and external discharge mechanism;
7. The SZLH678/768 pellet mill is equipped with an external thin oil lubrication device for forced lubrication of the main shaft bearings, etc. Other models are optional;
8. Optional steam pipeline system to improve conditioning and maturation effect;
9. As needed, a two- or three-layer ordinary or jacketed conditioner can be selected to produce higher quality feed;
10. As needed, a ring die lifting device and an electric automatic oiling device can be selected to lubricate the main shaft bearings and pressure roller bearings.

We provide comprehensive support including:
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As a Custom Animal Feed Pellet Machine supplier, Goldlong Machinery And Engineering Co., Ltd. designs and builds the SZLH ring die pellet mill series for poultry, livestock, aqua feed and biomass projects. We are a China-based manufacturer operating from a 14,000 m² production facility, and we supply either individual pellet mills or complete feed milling lines on a turn-key basis.
Our engineering scope starts with process design and continues through manufacturing, installation, commissioning, operator training and after-sales support. This is why a Goldlong pellet mill is quoted as a production asset with a defined capacity, conditioning performance, safety protection and line interface, not as a standalone machine.
We currently offer three SZLH configurations built around the same gear drive and ring die platform. Each version is matched to a different conditioning duty and product group.
| Model | Typical Application | Capacity (t/h) | Main Motor (kW) | Die Inner Dia (mm) | Feeder / Conditioner (kW) |
|---|---|---|---|---|---|
| SZLH320 | Poultry and livestock farm lines | 2–5 | 37 | 320 | 0.75 / 2.2 |
| SZLH400 | Medium-scale feed mills | 3–10 | 75 / 90 | 400 | 1.5 / 5.5 |
| SZLH508 | Commercial feed plants | 5–20 | 132 / 160 | 508 | 1.5 / 7.5 |
| SZLH678 | High-throughput feed lines | 5–25 | 200 / 220 / 250 | 672 | 2.2 / 15 |
| SZLH768 | Large industrial feed mills | 10–36 | 250 / 280 / 315 | 762 | 2.2 / 15 |
Capacity values are based on typical poultry feed formulations with adequate steam conditioning. The final operating point is set during proposal engineering from the customer formula, moisture, die specification and steam supply.
The DDC version also includes iron removal protection before conditioning, plus an adjustable feeder speed to handle different feed varieties without compromising pellet quality.
A pellet mill works between upstream grinding and mixing and downstream cooling and screening. In a complete feed line, correctly sized Hammer Mill and Mixer equipment must supply mash with the right particle size and uniformity for the ring die.
We design the pellet mill as part of a material flow that includes pre-cleaning, grinding, mixing, conditioning, pelleting, cooling, crumbling, sifting and liquid addition. Because we manufacture this full range, we can match the mill to existing process equipment or supply a complete engineered line with one point of responsibility.
Our own 14,000 m² manufacturing facility gives us direct control over production, assembly and quality management. ERP management tracks workshop operations, and comprehensive inspections are carried out before shipment covering performance, stability, safety and full system testing.
Project implementation follows a defined cooperation process: requirement communication, process design, solution confirmation, equipment manufacturing, on-site installation, commissioning and training, then ongoing support. Common wear parts and critical components are kept in stock for rapid dispatch.
We have delivered machinery and turn-key projects to markets including Russia, Romania, Indonesia, New Zealand, the Philippines, Bangladesh, Pakistan, Iran, Syria, Jordan, Saudi Arabia and Sudan. Our service team provides remote diagnostics, regular follow-up and 24-hour rapid response support.
For a precise quotation and process design, send us the project data below. Our engineering team then selects the model, ring die hole pattern, conditioner length and control interface.
We build SZLH models from SZLH320 to SZLH768, covering approximately 2–36 t/h in the high-grade poultry range. Project capacity depends on formula, moisture, conditioning and die selection, so we confirm the operating point during process design.
Our DDC and conditioner version is used for high-grade livestock, poultry and aquatic feed. For dedicated floating or sinking aquatic feed, the high-grade aqua pellet mill with screw extrusion plus ring die is the better fit because it provides adjustable pellet sizes and dense, water-stable pellets.
Provide the raw material formula, target capacity, pellet diameter, available steam and site electrical data. If a full line is planned, include upstream grinding and mixing steps as well as downstream cooling and screening.
Both. We supply individual pellet mills and turn-key projects from design, installation and commissioning to training. We can include hammer mills, mixers, coolers, crumblers, rotary sifters and conveying systems as part of the same engineering package.
We commission the equipment, train operators, keep common spare parts in stock and provide rapid response support. Our service scope includes remote diagnostics, regular follow-up and technical consultation throughout the equipment lifecycle.