W.S. Tyler SS-33 Ro-Tap® II Sieve Shaker
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | SS-33 |
| Price | Upon Request |
Overview
The W.S. Tyler SS-33 Ro-Tap® II Sieve Shaker is a precision-engineered mechanical sieve shaker designed to perform standardized particle size distribution analysis in accordance with ASTM E11, ASTM D6913, ISO 3310-1, and USP . It employs a dual-stack orbital motion combined with vertical tapping—replicating the exact kinematic profile of the legacy Ro-Tap® single-stack models—to deliver high reproducibility across parallel sieve analyses. Unlike rotary or vibratory shakers, the Ro-Tap® II mechanism generates 278 horizontal oscillations and 150 vertical taps per minute, ensuring consistent energy input and minimal particle segregation during sieving. This deterministic motion profile is critical for regulatory-compliant testing in QC laboratories, aggregate processing, pharmaceutical excipient qualification, and mineralogical characterization where method adherence directly impacts data validity.
Key Features
- Dual independent 8-inch (203 mm) sieve stacks operate simultaneously under identical Ro-Tap® motion parameters—enabling comparative analysis, duplicate runs, or split-sample validation without sequential time delay.
- Robust 1/4 HP induction motor with thermally protected windings ensures continuous-duty operation in high-throughput environments; motor housing is sealed against dust ingress (IP54 equivalent).
- Integrated digital timer with 0.1-second resolution and 99-minute maximum duration supports precise protocol execution; timer retains settings after power interruption and includes audible end-of-cycle alert.
- Quick-adjust sieve support plate accommodates full-height, half-height, or intermediate-height frames without tools; locking levers secure stack alignment during operation.
- Structural steel frame with vibration-dampening rubber feet allows direct bench mounting; optional bolt-down kit available for permanent installation on reinforced concrete or steel workbenches.
- Compliance-ready design includes traceable calibration documentation and compatibility with W.S. Tyler’s NIST-traceable certified reference sieves (ASTM E11 Grade A, ISO 3310-1 Class 2).
Sample Compatibility & Compliance
The SS-33 accepts standard 8-inch (203 mm) test sieves in full-height (2.5 in), half-height (1.25 in), and intermediate-height (1.75 in) configurations. It is fully compatible with ASTM E11 woven-wire mesh sieves (No. 4–No. 635; 4.75 mm–20 µm), as well as ISO 3310-1 equivalents (200 mm diameter). The dual-stack architecture maintains identical kinetic energy delivery to both columns, satisfying ASTM D6913 Annex A1 requirements for replicate sieving. All electrical components meet UL 61010-1 and CE/EMC directives. When used with validated sieve sets and documented SOPs, the system supports GLP/GMP audit trails and FDA 21 CFR Part 11–compliant data integrity when paired with compliant LIMS or ELN platforms.
Software & Data Management
The SS-33 operates as a standalone electromechanical instrument with no embedded firmware or network interface. Data acquisition is performed externally via laboratory information management systems (LIMS) or electronic lab notebooks (ELN) that record operator ID, sieve set serial numbers, timer settings, and environmental conditions (e.g., humidity, temperature) per ISO/IEC 17025 Clause 7.7. Optional integration with W.S. Tyler’s SieveTrack™ desktop software (sold separately) enables automated test logging, pass/fail flagging against user-defined limits, and PDF report generation compliant with ASTM E29 and ISO/IEC 17025 reporting requirements. Audit trail functionality—including timestamped edits, user authentication, and version control—is maintained at the host software layer.
Applications
- Quality control of bulk powders in pharmaceutical manufacturing (APIs, excipients, granules) per USP and EP 2.9.33.
- Aggregate gradation testing for asphalt and concrete mix design per ASTM C136 and AASHTO T 27.
- Mineral processing optimization including ore liberation analysis and flotation feed sizing.
- Ceramic and refractory raw material classification where narrow particle distribution is critical to sintering behavior.
- Environmental soil particle analysis per ASTM D422 and EPA Method 1684B.
- Research-grade particle morphology correlation studies requiring statistically robust replicates under identical mechanical stress profiles.
FAQ
What standards does the SS-33 comply with?
It is engineered to meet ASTM E11, ASTM D6913, ISO 3310-1, and USP motion and dimensional specifications.
Can ISO 200 mm sieves be used?
Yes—the SS-33 accepts 200 mm diameter sieves with appropriate adapter rings; full compatibility requires W.S. Tyler’s ISO-certified frame series.
Is the dual-stack motion synchronized?
Yes—both stacks receive identical cam-driven motion from a single drive shaft, ensuring identical tap count, oscillation amplitude, and phase alignment.
What maintenance is required?
Annual inspection of cam follower wear, motor bearing lubrication (grease type NLGI #2), and verification of tap frequency using a calibrated tachometer or stroboscope.
Does it support GLP/GMP documentation?
Yes—when operated within a validated environment using controlled procedures, calibrated sieves, and auditable data capture systems.
