Custom Feed Oil Adding and Liquid Spraying System Manufacturers

Oil and Liquid Adding Systems Built for Feed Performance

Goldlong Machinery and Engineering Co., Ltd. is a China-based feed machinery manufacturer and turnkey project supplier. Our Custom Feed Oil Adding and Liquid Spraying System  range covers surface coating equipment for pelleted and extruded feeds, enabling uniform addition of oils, molasses, enzymes, vitamins, amino acids and grease-based formulas. The same engineering approach applies to new feed mills and to retrofit projects where a dryer or cooler already exists and liquid application must be added before storage or packing.

In this product family, precision drives production economics. High-pressure nozzles atomize the liquid while the drum keeps pellets in continuous motion, producing an even surface coating without over-wetting. The result is consistent nutrient content, less fat or additive loss and a finished feed with improved palatability and reduced dust.

What We Supply in This Category

The current build platform is the SYPG Series Drum Grease Spraying Machine. It combines a high-precision drum spraying mechanism, adjustable spraying volume and speed, and an automatic control system in a compact, stainless steel construction. The machine supports both automatic and semi-automatic modes, which fits continuous feed lines as well as batch production.

Beyond the stand-alone machine, we configure the liquid handling circuit around the project: storage and dosing tanks, pump set, pressure and flow regulation, nozzle arrangement, control panel and safety interlocks. Our proposal therefore covers the complete liquid application station, not only the rotating drum.

Offered Range and Application Fit

Process and Application Fit

A typical installation point is after the Pellet Mill or extruder and after cooling and drying. Applying fat after pelleting protects pellet durability and allows higher oil inclusion without weakening starch gelatinization or physical structure. On extruded aqua lines, the same position lets you spray fish oil, lecithin and vitamin solutions onto the dry kernel after drying, which reduces losses during processing.

For high-viscosity liquids such as molasses or enzyme preparations, the wetted circuit is matched to the liquid: stainless steel and corrosion-resistant materials, nozzle selection based on viscosity, and operating settings that keep the spray pattern stable. We confirm material and nozzle compatibility during the engineering phase, before manufacturing begins.

Configuration choices we define with you

• Line capacity and target addition rate
• Continuous or batch operation
• Liquid type, viscosity and heating requirements
• Spray volume, spray speed and drum rotation speed ranges
• Automatic, semi-automatic or manual control level
• Floor-mounted frame or integration with existing conveyors
• Nozzle count, type and spray angle for even coverage
• Wetted material and cleaning access requirements

Controls, Automation and Line Integration

The control system is arranged around your operation level. In automatic mode, the system regulates spray volume and drum speed while production is running, keeping the addition rate stable from start to end of shift. In semi-automatic mode, the operator sets the spray time, flow rate and drum speed from the panel, which suits frequent product changeovers.

We coordinate the electrical interface with adjacent equipment during the engineering phase. This includes supply voltage, control signals, start-stop interlocks and any remote monitoring needed by the plant. Safety interlocks with upstream and downstream equipment are part of the control package, and the machine is designed for stable, low-noise operation under continuous high-load duty.

Quality Assurance, Testing and Project Handover

We manufacture the equipment in our own facility with ERP-controlled workshop operations and full pre-shipment inspection. Each liquid adding system is checked for performance, stability, safety and complete system operation before it leaves the factory. For turnkey projects, we support installation, commissioning, operator training and maintenance guidance on site, with transparent communication from process design through handover.

Goldlong has exported machinery and turnkey projects to Russia, Romania, Indonesia, New Zealand, the Philippines, Bangladesh, Pakistan, Iran, Syria, Jordan, Saudi Arabia and Sudan. Our project experience with poultry, livestock, aqua and biomass feed lines lets us adapt the spraying package to local raw material conditions, power supply characteristics and documentation needs.

Information We Use to Configure Your Solution

Maintenance, Spare Parts and Serviceability

The drum spraying module is built for access: nozzles can be checked without dismantling the drive, and the compact frame keeps cleaning points reachable for daily line changeovers. During commissioning we provide cleaning procedures, lubrication schedules and a recommended spare parts list.

Common wear parts and critical components are kept in stock for immediate dispatch, and the after-sales team provides remote diagnostics and rapid response. We also offer operator training so your team can handle routine adjustments, quality checks and process optimization independently.

Common Questions From Project Teams