Mary Ann® SS-25F Rotary Laboratory Sifter
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | SS-25F |
| Pricing | Upon Request |
Overview
The Mary Ann® SS-25F Rotary Laboratory Sifter is a precision-engineered, gravity-fed particle size analysis instrument designed for reproducible dry sieve fractionation in quality control, R&D, and regulatory-compliant testing environments. Operating on the principle of combined rotational motion and controlled tapping—often referred to as “rotary-tap” sieving—it subjects particulate samples to simultaneous 45° inclination and orbital rotation, enhancing stratification and particle passage through standardized mesh apertures. This dual-motion mechanism ensures high repeatability across ASTM E11, ISO 3310-1, and USP <786> compliant sieve analyses. The SS-25F variant is specifically configured for international laboratories operating on 220V / 50Hz power infrastructure, maintaining full functional parity with the 115V/60Hz SS-25 model while meeting IEC 61000-6-3 EMC and IEC 61000-6-2 immunity requirements.
Key Features
- Rotary-tap sieving action: 45° fixed tilt + continuous rotation enables efficient particle dispersion and aperture penetration without manual agitation or clamping.
- No-clamp stack assembly: Standardized 203 mm (8 in) and 305 mm (12 in) diameter test sieves stack vertically up to 660 mm (26 in) height—secured solely by gravity and interlocking flange design.
- Digital timer with ±1-second accuracy: Programmable 0–99 minute duration supports method-defined sieve durations per ASTM D6913 or ISO 13320 Annex B protocols.
- Modular cabinet enclosure: Fully enclosed hardwood-finished cast aluminum housing with reversible hinged door (left- or right-mount configurable) minimizes dust emission and meets OSHA 1910.94 ventilation guidance.
- Integrated support frame: Doubles as both structural base and vertical storage rack for unused sieves—optimized for lab space efficiency and GMP-aligned equipment organization.
- Robust drive system: Cast aluminum hammer assembly with balanced eccentric rotation delivers consistent kinetic energy transfer across all sieve layers, minimizing inter-layer segregation bias.
Sample Compatibility & Compliance
The SS-25F accommodates dry, free-flowing, non-cohesive powders and granules within the nominal particle size range of 4.75 mm (No. 4 ASTM) to 20 µm (No. 635 ASTM), aligning with standard test sieve series per ASTM E11 and ISO 3310-1. It supports stainless steel, brass, and nylon mesh frames in both 203 mm and 305 mm diameters, with stack configurations accommodating up to ten 8-inch sieves or six 12-inch sieves at full height. The unit is validated for use with certified reference materials (CRMs) traceable to NIST SRM 1990 and equivalent ISO standards. All mechanical and electrical components comply with UL 61010-1 (2nd Ed.) and CE marking directives for laboratory equipment safety.
Software & Data Management
While the SS-25F operates as a standalone electromechanical instrument without embedded firmware or network connectivity, its precise timing control (±1 s) and repeatable motion profile enable seamless integration into validated LIMS and ELN workflows. Users may document test parameters—including sieve stack configuration, dwell time, voltage/frequency setting, and operator ID—via paper-based or electronic batch records aligned with FDA 21 CFR Part 11 requirements when paired with audit-trail-enabled documentation systems. Optional calibration certificates (traceable to NIST) and IQ/OQ documentation packages are available upon request to support GLP and GMP validation protocols.
Applications
- Pharmaceutical excipient and API particle size distribution (PSD) verification per USP <786> and ICH Q5A.
- Construction materials testing: aggregate gradation analysis per ASTM C136 and AASHTO T 27.
- Food powder consistency screening (e.g., flour, sugar, dairy powders) under FDA Food Safety Modernization Act (FSMA) preventive controls.
- Ceramic and metallurgical powder characterization prior to sintering or additive manufacturing feedstock qualification.
- Environmental soil and sediment particle classification per ASTM D422 and ISO 14688-1.
FAQ
What power supply does the SS-25F require?
The SS-25F is configured for 220V ±10%, 50Hz single-phase operation and includes internal voltage regulation compatible with standard European and Asian industrial outlets.
Can the SS-25F be used with ISO-certified test sieves?
Yes—the unit accepts all ISO 3310-1 and ASTM E11 compliant test sieves with 203 mm or 305 mm outer diameters and standard flange dimensions.
Is the timer programmable in seconds or only minutes?
The digital timer displays and increments in 1-second intervals across the full 0–99 minute range, enabling precise adherence to method-defined durations such as 5 minutes 30 seconds per ASTM D6913 Section 7.3.
Does the unit include a calibration certificate?
Calibration documentation is not included by default but can be supplied separately with NIST-traceable timing verification and mechanical motion validation reports.
What maintenance is required for long-term operational reliability?
Routine inspection of the eccentric drive coupling, periodic cleaning of the hammer assembly and sieve flanges, and annual verification of timer accuracy constitute the recommended preventive maintenance schedule per manufacturer guidelines.
