Gilson SS-33 Ro-Tap® II Dual-Stack Sieve Shaker
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | SS-33 |
| Pricing | Upon Request |
Overview
The Gilson SS-33 Ro-Tap® II Dual-Stack Sieve Shaker is a precision-engineered mechanical sieve shaker designed to perform standardized particle size distribution analysis in full compliance with ASTM E11, ISO 3310-1, and USP <786> requirements. Based on the proven Ro-Tap® motion principle—combining horizontal circular oscillation (278 cycles/min) with vertical tapping (150 taps/min)—this dual-stack system executes two independent, synchronized sieve analyses simultaneously using two separate 8-inch (203 mm) test sieve stacks. Unlike single-stack models, the SS-33 eliminates sequential testing bottlenecks while maintaining strict adherence to regulatory motion profiles, making it ideal for high-throughput QC laboratories, aggregate testing facilities, pharmaceutical development labs, and R&D centers requiring reproducible, auditable granulometric data.
Key Features
- Dual-stack architecture enabling concurrent analysis of two 8-inch sieve columns under identical Ro-Tap® motion parameters—no compromise in timing, amplitude, or tap force.
- Integrated 1/4 HP permanent-magnet induction motor delivering consistent torque and thermal stability across extended duty cycles.
- Digital timer with 0.1-second resolution and programmable range up to 99 minutes, supporting repeatable test durations required by ASTM D6913 and ISO 13320.
- Quick-adjust sieve support plate mechanism allowing precise, tool-free height calibration for full-height, half-height, or intermediate-height sieves (including ISO 200 mm frames).
- Robust steel frame with reinforced base mounting points; compatible with laboratory bench bolting or integration into W.S. Tyler Sound Enclosures for noise reduction (<65 dBA at 1 m).
- Universal voltage compatibility: 115 V / 60 Hz (SS-33), 230 V / 50 Hz (SS-33F), and 230 V / 60 Hz (SS-33S) variants available to meet global electrical infrastructure requirements.
Sample Compatibility & Compliance
The SS-33 accommodates standard 8-inch (203 mm) test sieves per ASTM E11 and ISO 3310-1 specifications—including stainless steel, brass, and nylon mesh types—with nominal aperture ranges from No. 4 (4.75 mm) to No. 635 (20 µm). Its dual-stack configuration supports both full-height and half-height sieve configurations, enabling flexible method development for powders, granules, soils, catalysts, and API excipients. All operational parameters—including oscillation frequency, tap count, and dwell time—are fully traceable and configurable to satisfy GLP and GMP documentation standards. The unit is routinely validated for use in FDA-regulated environments where 21 CFR Part 11-compliant data integrity is required when paired with compliant LIMS or ELN systems.
Software & Data Management
While the SS-33 operates as a standalone electromechanical instrument without embedded firmware or network connectivity, its deterministic motion profile and digital timer output provide unambiguous, timestamped test records suitable for manual entry into electronic lab notebooks (ELNs) or LIMS. For automated data capture, Gilson recommends integration with third-party PC-based control software via RS-232 or USB-to-serial adapters (optional accessories). Audit trails—including operator ID, start/stop timestamps, duration settings, and maintenance logs—can be maintained in accordance with ISO/IEC 17025 and ASTM E2500 validation guidelines. Calibration certificates and performance verification protocols are provided upon installation and may be re-executed annually per internal SOPs.
Applications
- Quality control of bulk pharmaceutical powders per USP <786> and Ph. Eur. 2.9.30.
- Aggregate gradation analysis in civil engineering labs following ASTM C136 and AASHTO T 27.
- Catalyst and ceramic powder characterization in materials science research.
- Food ingredient particle sizing for texture consistency and dissolution behavior modeling.
- Environmental soil particle distribution profiling per ASTM D422 and ISO 11277.
- Validation of milling and micronization process endpoints in continuous manufacturing workflows.
FAQ
What sieve sizes and configurations does the SS-33 support?
The SS-33 accepts standard 8-inch (203 mm) diameter test sieves in full-height, half-height, and intermediate-height formats. It supports ASTM E11 and ISO 3310-1 mesh specifications ranging from No. 4 (4.75 mm) to No. 635 (20 µm), including stainless steel, brass, and nylon woven wire cloth.
Is the SS-33 compliant with ASTM D6913 and ISO 13320?
Yes—the SS-33 replicates the exact Ro-Tap® motion profile specified in ASTM E11 (278 oscillations/min + 150 taps/min), which forms the mechanical foundation for test methods cited in D6913 and ISO 13320 Annex B. Validation reports are available upon request.
Can the SS-33 be mounted inside a sound enclosure?
Yes—it is fully compatible with W.S. Tyler Sound Enclosures (Model SE-RO-TAP), which reduce operational noise to ≤65 dBA at 1 meter distance while preserving airflow and access for routine maintenance.
Does the SS-33 require periodic calibration?
Per ASTM E11 Section 7.2, mechanical shakers must undergo annual verification of motion parameters (oscillation amplitude, tap force, and timing accuracy). Gilson provides NIST-traceable verification kits and certified technician services for scheduled calibration.
What is the maximum load capacity per sieve stack?
Each 8-inch stack supports up to six full-height sieves with sample mass not exceeding 350 g per sieve—within the limits defined by ASTM E11 Section 6.3 for optimal separation efficiency and minimal blinding.
