Gilson SS-8R Tapping Sieve Shaker
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | SS-8R |
| Pricing | Upon Request |
| Voltage/Frequency | 115 V / 60 Hz or 230 V / 50 Hz |
| Sieve Capacity | Up to 20 × 8 in (203 mm) half-height sieves or 10 × full-height sieves + pan |
| Tap Frequency | 48 taps/min |
| Recommended Particle Size Range | 25 mm – 20 µm (1 in – No. 635) |
| Motor | 1/3 HP heavy-duty |
| Control | Digital timer with programmable duration up to 99 min 59 sec |
| Clamping System | EZ-Clamp™ mechanical lever-and-knob mechanism |
| Compliance | Designed for ASTM E11, ISO 3310-1, and USP <786> sieve analysis procedures |
Overview
The Gilson SS-8R Tapping Sieve Shaker is an electromechanical particle size analyzer engineered for standardized dry-sieving applications in geotechnical, aggregate, pharmaceutical, and materials testing laboratories. It operates on the principle of controlled vertical tapping combined with rotational motion—distinct from simple vibratory or horizontal shaking methods—to achieve high-fidelity particle stratification and efficient separation across multi-tiered sieve stacks. Unlike reciprocating shakers that generate dead zones and incomplete material reorientation, the SS-8R employs a patented cyclical rotation-tap sequence: continuous 360° rotation ensures isotropic particle movement, while synchronized downward taps (48 per minute) dislodge near-size particles lodged at mesh apertures. This dual-mode action significantly improves sieve efficiency, repeatability, and statistical confidence in cumulative undersize distribution curves—critical for compliance-driven workflows under ASTM C136, AASHTO T 27, ISO 13320, and USP .
Key Features
- Patented EZ-Clamp™ system: Single-knob actuation secures full-height or stacked half-height sieve assemblies (up to 20 × 8 in) without tools or permanent mounting—enabling rapid stack configuration changes between test protocols.
- Balanced mechanical architecture: Precision-machined counterweights and rigid steel housing minimize lateral vibration, ensuring stable operation on standard lab benches without anchoring or isolation pads.
- Digital electronic controller: Front-panel membrane buttons allow precise time programming (00:01–99:59), automatic cycle termination, and memory retention of last-used settings; timing accuracy ±0.5 sec over full range.
- Heavy-duty 1/3 HP induction motor: Thermally protected, continuous-duty design delivers consistent tap amplitude and rotational torque across voltage variants (115 V / 60 Hz or 230 V / 50 Hz).
- Modular compatibility: Accepts ASTM E11-compliant 8 in (203 mm) wire cloth or perforated plate sieves—including stainless steel, brass, and nylon mesh options—and supports optional adapters for ISO 3310-1 200 mm sieves.
Sample Compatibility & Compliance
The SS-8R is validated for granular solids with bulk densities between 0.5–3.2 g/cm³ and moisture content <2% w/w. It accommodates free-flowing powders, crushed aggregates, foundry sands, catalyst beads, and milled APIs. Performance meets or exceeds requirements for ASTM E11 (Specification for Woven Wire Test Sieve Cloth and Test Sieves), ISO 3310-1 (Test Sieves — Technical Requirements and Testing — Part 1: Test Sieves of Metal Wire Cloth), and USP (Particle Size Distribution). When operated with traceable NIST-calibrated sieves and documented SOPs, data generated supports GLP and GMP audit readiness, including 21 CFR Part 11–compliant electronic records when paired with Gilson’s optional DataLink software.
Software & Data Management
While the SS-8R operates as a standalone instrument, its digital timer output can interface with external data acquisition systems via TTL-level trigger signals (optional accessory). For regulated environments, Gilson recommends integration with LabVantage LIMS or Thermo Fisher SampleManager via RS-232 or USB-to-serial adapters. The controller logs no internal data but supports external timestamp synchronization for audit-trail integrity. All firmware updates are distributed through Gilson’s secure customer portal, with version history and change logs available for QA documentation.
Applications
- Soil gradation analysis per ASTM D6913 and AASHTO T 88 for civil engineering classification.
- Aggregate quality control in concrete and asphalt production (ASTM C33, C136).
- Pharmaceutical excipient and active ingredient particle sizing per USP , supporting dissolution rate modeling and blend uniformity assessment.
- Quality assurance of metal powders in additive manufacturing feedstock (ASTM F3049).
- Research-scale fractionation of catalysts, ceramics, and battery electrode materials prior to BET surface area or laser diffraction analysis.
FAQ
What sieve diameters and heights does the SS-8R support?
The SS-8R accepts standard 8 in (203 mm) diameter test sieves in half-height (25 mm), intermediate-height (51 mm), or full-height (76 mm) configurations. With optional adapters, it also accommodates ISO 3310-1 200 mm sieves.
Is the tap frequency adjustable?
No—the SS-8R operates at a fixed, calibrated tap frequency of 48 taps per minute, optimized for ASTM and ISO compliance. Frequency adjustment is not supported to maintain method equivalence.
Can the SS-8R be used for wet sieving?
No—this unit is designed exclusively for dry-sieving applications. Wet sieving requires dedicated equipment with liquid containment, corrosion-resistant construction, and drainage systems.
Does the EZ-Clamp system require periodic recalibration?
No—EZ-Clamp is a purely mechanical clamping mechanism with no sensors or calibration dependencies. Routine inspection for wear on the cam lever and bushings is recommended every 500 operating hours.
How is traceability maintained for regulatory submissions?
Traceability relies on using certified reference sieves (e.g., NIST-traceable aperture standards), documenting operator ID, sieve lot numbers, environmental conditions (temperature/humidity), and instrument serial number in test reports—practices fully supported by Gilson’s SOP templates and validation packages.
