NEXOPART HAVER RPT Rotary Sample Divider

Overview

The NEXOPART HAVER RPT Rotary Sample Divider is an engineered precision instrument designed for statistically representative sample subdivision of bulk granular, powdered, or slurry materials in laboratory, quality control, and production environments. Based on the proven rotary cup division principle—where material flows continuously through a rotating, multi-compartment rotor under gravity—the HAVER RPT achieves high-fidelity mass-proportional splitting via controlled mechanical segmentation. Unlike static or manual dividers, its dynamic rotational architecture minimizes segregation effects caused by particle size, density, or moisture heterogeneity. The system supports three fixed mass-split ratios—1:8, 1:10, and 1:30—each implemented within a single, interchangeable rotor assembly, enabling method flexibility without hardware reconfiguration. Designed to meet the foundational requirements of ISO 13320, ASTM D6938, and EN 933-1 for representative sampling, the HAVER RPT delivers ≤0.1% relative standard deviation (RSD) in replicate split performance across diverse material classes—including cohesive powders, agglomerated granules, and low-viscosity suspensions.

Key Features

• High-speed rotary distribution at 3,000 cycles per minute, ensuring rapid throughput without compromising mass fidelity
• Triple-ratio rotor system (1:8 / 1:10 / 1:30) with tool-free interchangeability for method-specific validation and routine switching
• Universal compatibility with dry free-flowing powders, slightly damp aggregates, and aqueous or organic slurries up to 40% solids content
• Integrated automatic feeder module with adjustable feed rate and vibration-assisted flow initiation to prevent bridging and rat-holing
• Gravity-fed, non-contact sample path design eliminating shear-induced particle breakage or segregation during transfer
• Stainless steel 316 construction throughout wetted zones; IP54-rated enclosure for dust resistance in industrial lab settings
• Touchscreen HMI with preloaded SOP templates, audit trail logging, and password-protected parameter access control

Sample Compatibility & Compliance

The HAVER RPT accommodates particle size distributions from 10 mm and bulk densities ranging from 0.2 g/cm³ (aerated silica) to 4.8 g/cm³ (metallic shot). Its rotor geometry and feed dynamics have been validated for challenging matrices—including hygroscopic salts, fibrous cellulose derivatives, and high-aspect-ratio nanocomposites—where conventional riffle or cone dividers exhibit bias due to stratification. All operational protocols align with ISO/IEC 17025 requirements for sampling uncertainty estimation, and the device supports GLP-compliant documentation through timestamped electronic records. Optional calibration verification kits (traceable to NIST SRM 1980) are available for periodic accuracy confirmation per internal QA procedures.

Software & Data Management

Firmware v3.2 includes embedded data logging with real-time split count, cumulative mass tracking, and cycle-integrated environmental metadata (ambient temperature/humidity). Export formats include CSV and XML for LIMS integration. Audit trails comply with FDA 21 CFR Part 11 requirements, featuring electronic signatures, immutable event logs, and role-based user permissions (Operator, Supervisor, Administrator). Remote diagnostics and firmware updates are supported via secure TLS-encrypted Ethernet connection—no cloud dependency or third-party telemetry.

Applications

• Preparation of sub-samples for laser diffraction particle size analysis (e.g., Malvern Mastersizer, Beckman Coulter LS series)
• Homogenization prior to XRF, ICP-OES, or elemental combustion analysis where compositional heterogeneity impacts detection limits
• Batch release testing in pharmaceutical excipient manufacturing per USP and Ph. Eur. 2.9.20
• Aggregate gradation testing in civil engineering labs adhering to AASHTO T 27 and ASTM C136
• Quality assurance of battery cathode powders (NMC, LFP), catalysts, and pigment dispersions in R&D and scale-up workflows

FAQ

What standards does the HAVER RPT comply with for sampling accuracy?
It meets the repeatability and representativeness criteria defined in ISO 13320 (particle size analysis), ASTM D6938 (aggregate sampling), and EN 933-1 (granular material subdivision). Calibration certificates are issued against traceable reference materials.
Can the HAVER RPT handle abrasive or corrosive materials?
Yes—rotor cups, feed chute, and collection chutes are fabricated from electropolished stainless steel 316; optional ceramic-coated rotors are available for highly erosive applications such as ground slag or silicon carbide grit.
Is method validation support provided?
NEXOPART supplies application notes, SOP templates, and statistical validation protocols aligned with ISO 5725-2 for intermediate precision assessment, including repeatability and reproducibility studies.
How is cleaning performed between sample types?
The modular rotor and feed assembly disassembles in <90 seconds without tools; all components are compatible with ultrasonic cleaning baths and autoclave sterilization (121°C, 2 bar).
Does the system require compressed air or external utilities?
No—it operates solely on single-phase 230 V AC power (50/60 Hz); no pneumatics, vacuum, or cooling water connections are needed.