KER—WF Reciprocal Sample Divider
| Origin | China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Model | KER-WF |
| Price | Upon Request |
| Maximum Feed Particle Size | ≤13 mm |
| Splitting Ratio | Adjustable (1:2, 1:4, or 1:8) |
| Throughput Capacity | 800–1,200 kg/h |
| Motor | Y90S-6, 0.75 kW |
| Power Supply | Three-phase 380 V AC |
| Weight | 80 kg |
| Dimensions (L×W×H) | 700 × 500 × 800 mm |
Overview
The KER-WF Reciprocal Sample Divider is an industrial-grade mechanical sample division instrument engineered for high-fidelity, reproducible subdivision of bulk granular materials—primarily coal, ores, mineral aggregates, biomass fuels, and other free-flowing particulate solids with particle sizes up to 13 mm. Unlike rotary or riffle-type dividers that require pre-mixing or rely on gravitational cascading, the KER-WF implements a reciprocating motion principle: feed material is conveyed linearly into a synchronized, oscillating splitter assembly comprising multiple parallel chutes. This design ensures each subsample receives statistically representative material fractions without homogenization bias—a critical requirement in ISO 13909, ASTM D2013, and GB/T 474-compliant coal sampling protocols. The device operates on deterministic mechanical partitioning rather than probabilistic dispersion, delivering consistent mass reduction ratios (1:2, 1:4, or 1:8) under continuous feed conditions at throughput rates of 800–1,200 kg/h.
Key Features
- Reciprocating splitter mechanism with precision-machined stainless steel chutes ensures minimal cross-contamination and wear resistance across abrasive feedstocks.
- No pre-mixing required—preserves original particle size distribution and segregation characteristics prior to division, aligning with strict chain-of-custody requirements in certified reference material preparation.
- Three fixed splitting ratios (1:2, 1:4, 1:8) are selected via mechanical stop-position adjustment; no electronic controls or calibration drift concerns.
- Robust Y90S-6 induction motor (0.75 kW) provides stable torque output under variable load conditions; integrated thermal overload protection complies with IEC 60034 standards.
- Compact footprint (700 × 500 × 800 mm) and modular base mounting facilitate integration into laboratory sample preparation lines or mobile field stations.
- Full enclosure with hinged access panels enables rapid chute inspection and residue clearance—reducing downtime during multi-batch operation.
Sample Compatibility & Compliance
The KER-WF accommodates dry, non-cohesive granular samples with top-size ≤13 mm and bulk density ranging from 0.6 g/cm³ (e.g., lignite) to 2.8 g/cm³ (e.g., hematite ore). It is not suitable for sticky, fibrous, or highly moisture-sensitive materials (e.g., wet coal >8% moisture, green biomass). Performance validation follows ISO 13909-4 (coal and coke — Sampling — Part 4: Methods for determining the precision of sampling equipment) and GB/T 474-2008 (Method for preparing coal samples). When operated per manufacturer-specified feed rate limits and maintenance intervals, the unit achieves repeatability of ±0.8% relative standard deviation (RSD) in mass split ratio over 10 consecutive runs—verified using certified reference coal SRM 1632E (NIST).
Software & Data Management
The KER-WF is a fully mechanical, standalone instrument with no embedded firmware, touch interface, or data logging capability. Its operation requires no software installation, network connectivity, or cybersecurity configuration—making it inherently compliant with environments governed by FDA 21 CFR Part 11 (where electronic records are not generated) and GLP Annex 15 audit requirements for manual instrumentation. All operational parameters—including split ratio selection, feed rate monitoring, and maintenance logs—are recorded manually in laboratory notebooks or LIMS-integrated paper-based SOPs. Optional external digital load cells (not included) may be interfaced for real-time mass tracking when paired with third-party acquisition systems.
Applications
- Primary sample reduction in coal quality control laboratories accredited to ISO/IEC 17025.
- Preparation of analytical sub-samples for proximate analysis (ASTM D3172), ultimate analysis (ASTM D3176), and calorific value determination (ASTM D5865).
- Mineral processing pilot plants requiring representative splits for metallurgical testing (e.g., grindability, leach kinetics).
- EPA Method 19 (waste fuel sampling) and EN 15407 (solid recovered fuels) compliance workflows.
- Academic research on particle segregation behavior and sampling theory validation.
FAQ
Is the KER-WF suitable for wet or high-moisture coal samples?
No. The reciprocating mechanism is designed for free-flowing, dry granular materials. Moisture content above 8% may cause chute adhesion and ratio deviation.
Can the splitting ratio be adjusted beyond 1:8?
No. The mechanical design supports only three discrete ratios: 1:2, 1:4, and 1:8. Custom ratios require hardware modification and recalibration—not recommended.
Does the unit include dust suppression or explosion-proofing?
Standard configuration lacks ATEX or IECEx certification. Optional dust-tight enclosures and static-dissipative chute linings are available upon request for hazardous area deployment.
What maintenance schedule is recommended?
Daily visual inspection of chute alignment and residue accumulation; bi-weekly lubrication of linear guide rails; annual verification of splitter symmetry using calibrated gauge blocks per ISO 13909-7 Annex B.
Is technical support available outside China?
Yes—authorized distributors provide local commissioning, operator training, and spare parts logistics in APAC, EMEA, and LATAM regions under contractual service agreements.
