Counterweight Ballast Sand

Counterweight Ballast Sand is a cost-effective filling material for general counterweight projects. It is used in industrial equipment bases, standard counterweight blocks, fitness products, and other static weight-filling applications where a moderate bulk density is acceptable. The material consists of screened iron granules with uniform particle size and controlled impurity levels, produced through a sequence of crushing, grinding, and anti-rust passivation.

The product is manufactured at Shandong Haishan Industrial Technology's facility in Zouping, Shandong Province, which operates under ISO 9001, ISO 14001, and ISO 45001 management systems. Batch records are maintained for traceability. This material is not intended for projects requiring a bulk density above 7.0 g/cm³ or for filling narrow cavities where a more compact high-density filler is needed.

Technical Specifications

Density and Flowability

The bulk density of Counterweight Ballast Sand is maintained within 6.8 to 7.0 g/cm³. This range provides adequate weight for most general counterweight applications without the additional cost of high-density specialty materials. The particle size distribution is controlled through multi-stage screening, which removes hollow particles and dust. The resulting granules have moderate flowability, allowing smooth feeding during filling operations without bridging or blockage in standard hoppers and conveyors.

The material is not designed for long-distance pneumatic conveying. Fine particles and moderate flowability are suited to short-distance screw feeding, belt conveying, or direct dumping. Buyers should confirm their filling equipment before ordering.

Anti-Rust Protection and Storage Stability

Each particle is treated with an anti-rust passivation layer during production. This surface treatment helps prevent oxidation and clumping when the material is stored in sealed cavities or exposed to normal indoor humidity. The passivation film is not a heavy-duty corrosion barrier, but it provides adequate protection for general indoor or covered outdoor storage. For applications involving continuous water contact or aggressive chemical exposure, a specialized corrosion-resistant material should be selected.

Quality Inspection and Documentation

Every production batch is tested for bulk density, particle size distribution, and impurity content. The table below summarizes the routine inspection points and available documents.

All records are retained for traceability. Buyers can request copies of specific documents before shipment or include them in the purchase agreement.

Certification and Facility Controls

Shandong Haishan Industrial Technology Co., Ltd. holds ISO 9001, ISO 14001, and ISO 45001 certifications. The in-house laboratory performs routine checks on particle grading, density, and impurity levels. These controls support consistent material performance across production batches.

Typical Applications

• Internal weight filling for ordinary industrial machinery
• Auxiliary filling for standard concrete counterweight blocks
• Small box embedding and non-structural weight addition
• Basic counterweight filling for fitness equipment
• Simple weight filling for non-standard metal components

This product is intended for general counterweight projects with moderate density requirements and budget constraints. It is not suitable for narrow cavities, ultra-high density demands, or long-distance pneumatic conveying.

Packaging and Supply Availability

Standard packaging includes 25 kg woven bags and 1-ton FIBC bags. Custom containers are available for bulk orders. Common specifications are kept in stock to support rapid dispatch. Each shipment includes a batch certificate with density and inspection results. Additional test reports can be provided upon request.

Minimum order quantity is negotiable, and sample orders starting from 25 kg are available for evaluation. Regular specifications can be shipped within 7–10 days.

Selection Guidance

When evaluating Counterweight Ballast Sand for a project, consider the following factors:

• Density requirement: If the project needs more than 7.0 g/cm³, a high-density specialty material should be used instead.
• Filling method: Confirm that the material can be fed by short-distance screw, belt, or hopper. Long-distance pneumatic conveying is not recommended.
• Storage environment: The anti-rust passivation is suitable for indoor or covered storage. For continuous moisture or chemical exposure, a different coating may be required.
• Budget: This product offers a cost-effective solution for general counterweight needs where ultra-high density is not required.

Frequently Asked Questions

Q1: What is the bulk density of Counterweight Sand?

The bulk density is maintained at 6.8–7.0 g/cm³, with each batch tested and documented on the batch certificate. The tolerance is ±0.05 g/cm³.

Q2: Can this material be used for long-distance pneumatic conveying?

No. The particle size and flowability are optimized for short-distance feeding such as screw, belt, or direct hopper dumping. Long-distance pneumatic conveying may cause blockages and inconsistent feeding.

Q3: Will Counterweight Sand rust or clump during storage?

The particles are treated with an anti-rust passivation layer that protects against oxidation and clumping under normal indoor or covered outdoor storage. It is not designed for continuous water immersion or aggressive chemical environments.

Q4: Is this product suitable for high-density counterweight applications?

No. The bulk density of 6.8–7.0 g/cm³ is lower than specialty high-density materials. If the project requires maximum weight in limited space, a high-density Counterweight Ballast Sand should be selected.

Q5: What documentation is provided with each shipment?

Each shipment includes a batch certificate with density and inspection results. Additional reports for impurity content, moisture content, and particle size distribution can be provided upon request. Third-party inspection by SGS or BV is available if required.

Q6: Can packaging be customized for different handling equipment?

Yes. 25 kg woven bags, 1-ton FIBC bags, and custom containers are available. Packaging can be adapted to suit forklift handling, crane loading, or manual filling at the installation site.