Custom Rotary Sifter Machine Manufacturers

Goldlong Rotary Sifters for Process Screening

Goldlong Machinery And Engineering Co., Ltd. designs and manufactures rotary screening equipment for feed mills, grain processors, fertilizer plants and biomass lines. As Custom Rotary Sifter Machine Manufacturers, we supply the SFJH Series rotary sifter family and back it with turnkey engineering, from process design and machine fabrication to installation, commissioning, training and spare parts supply.

Our own 14,000 m² factory in Liyang, Jiangsu, gives us direct control over fabrication and quality inspection, while our project team engineers the surrounding process equipment so the sifter operates as part of the whole line. Browse the Product Center for related equipment such as hammer mills, mixers, pellet mills, coolers and conveyors.

The SFJH Series Rotary Sifter Range

The SFJH Series is our standard rotary sifter product family. It uses a belt driving system, adjustable screen layer and mesh, and a balance system with polymer nylon board that helps maintain stable amplitude during rotary operation. The screen system is designed for flexible operation, with less trouble and lower maintenance than more complex screen mechanisms.

Rated output depends on mesh size, moisture, bulk density and the separation requirements of each product. During the proposal stage we select the model from actual throughput data rather than from line nameplate capacity alone. Detailed specifications for each machine are listed on the SFJH Series Rotary Sifter product page.

Where the Rotary Sifter Fits in Your Plant

In feed and aquafeed production, the rotary sifter is normally installed after the cooler and crumbler and before packing, where it removes fines and oversized pellets from the final product. It is also used for raw ingredient cleaning before grinding or for grading mash before pelleting. The same screening principle applies to grain, chemical, mining and building material processes where granular products need classification.

Our Pellet Mill, hammer mill, mixer, cooler, crumbler and conveying equipment are supplied as part of the same process design, so screening is matched to the particle size distribution coming from upstream equipment.

• Finished pellet screening: remove dust and fines before packaging or coating.
• Crumbler classification: separate target crumble size from oversize returns.
• Raw material cleaning: reject oversize impurities and foreign material.
• Special granule grading: classify extruded, coated or moisture-sensitive granules.

Material and Screen Selection

Screening performance depends on particle shape, moisture, bulk density and the percentage of near-size particles in the feed. Fine or high-moisture powders can blind the screen, while elongated pellets require careful opening selection to pass the desired product and reject oversize.

When preparing a proposal, we use your material specification and separation target to define mesh opening, number of screen layers and screen area. If a representative sample or particle size analysis is available, it improves the accuracy of the capacity rating.

Configuration and Automation Integration

The SFJH Series is built with belt drive and a flexible screen system, making it straightforward to adapt as recipes change. For new projects, we integrate the sifter into the plant control system with correct start/stop sequencing and interlocking with upstream and downstream equipment. For existing lines, we confirm connection dimensions, available headroom and control points so installation causes minimal disruption.

In a full turnkey scope, our engineers handle the electrical control design and commissioning together with the mechanical installation, giving your operators a single point of responsibility.

Quality Assurance and Project Support

All SFJH sifters are manufactured in our own factory under ERP-managed workshop control. Before shipment, each machine undergoes comprehensive inspection covering performance, stability, safety and full system testing.

• Turnkey project implementation from requirement analysis and process design to installation and commissioning.
• Dedicated after-sales team with regular follow-ups, remote diagnostics and 24-hour rapid response support.
• Stock of common wear parts and critical components for quick dispatch.
• Operator training and maintenance guidance to help your team run the equipment independently.

We have delivered machinery and turnkey projects to Russia, Romania, Indonesia, New Zealand, the Philippines, Bangladesh, Pakistan, Iran, Syria, Jordan, Saudi Arabia and Sudan, and we support projects across Europe, Asia and Africa.

Information We Use to Configure Your Solution

To prepare a practical configuration and quotation, we need the following project information:

• Material: type, bulk density, moisture content and particle size distribution.
• Duty: throughput in t/h, screening purpose and target separation point.
• Screen requirements: number of layers, mesh opening or product size range.
• Line context: upstream and downstream equipment, inlet/outlet heights and existing conveying.
• Controls: available voltage/frequency and control system interface.
• Site: indoor/outdoor location, dust extraction and operator access.

With these points, we prepare a proposal that includes the selected model, motor power, screen configuration, connection dimensions and the integration method.

Frequently Asked Questions