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, CE-compliant dry particle sizing instrument designed for reproducible, standardized sieve analysis in quality control, R&D, and regulatory-compliant laboratories. Operating on the principle of combined rotational motion and controlled tapping—per ASTM E11, ISO 3310-1, and USP —the SS-25F delivers consistent mechanical energy input to promote efficient particle stratification and passage through stacked test sieves. Unlike vibratory or sonic sifters, its patented 45° inclined rotating drum architecture ensures uniform material presentation across the entire sieve surface while minimizing particle segregation artifacts. The unit is configured for global operation with dual-voltage compatibility (220 V / 50 Hz), making it suitable for laboratories in EU, APAC, and Latin American markets requiring IEC 61000-6-3 EMC compliance and low harmonic distortion.
Key Features
- Patented 45° tilt + rotation + tapping motion: Cast-aluminum hardwood-finished hammer assembly rotates at fixed speed while delivering calibrated vertical impact impulses—optimized for high recovery rates across fine to coarse fractions.
- No-clamp sieve stacking system: Accepts up to 26 in (660 mm) total stack height; sieves self-align and lock via gravity and interlocking flange geometry—eliminating operator-induced torque variability and clamp-related calibration drift.
- Dual-diameter compatibility: Supports both 8 in (203 mm) and 12 in (305 mm) diameter test sieves per ASTM E11 and ISO 3310-1 standards, with full-height capacity of 10 × 8-in or 6 × 12-in sieves.
- Precision digital timing: Microprocessor-controlled 99-minute timer with ±1-second accuracy, programmable in 1-second increments—fully traceable and audit-ready for GLP/GMP environments.
- Modular cabinet design: Fully enclosed steel cabinet with reversible hinged door (left- or right-mountable), integrated vibration-damping feet, and IP20-rated electrical enclosure.
- Integrated support frame: Doubles as both structural base and dedicated sieve storage rack—prevents warping, contamination, and misplacement during routine lab use.
Sample Compatibility & Compliance
The SS-25F accommodates free-flowing, non-cohesive, and mildly cohesive dry powders—including pharmaceutical granules, metal powders, catalysts, food ingredients, and mineral aggregates—within a nominal particle size range of 4.75 mm down to 20 µm (US Standard Sieve Series #4–#635). It is validated for use with stainless steel, brass, and nylon-mesh test sieves conforming to ASTM E11 Table 1 and ISO 3310-1 Annex A. The sifter meets mechanical safety requirements per EN 61000-6-2 and carries CE marking for electromagnetic compatibility (EN 61000-6-3) and low-voltage directive (2014/35/EU). Optional documentation packages include Factory Acceptance Test (FAT) reports and IQ/OQ protocols aligned with FDA 21 CFR Part 11 data integrity expectations.
Software & Data Management
While the SS-25F operates as a standalone electromechanical instrument without embedded software, its timing module generates time-stamped cycle logs (start time, duration, completion flag) exportable via RS-232 serial interface (optional adapter kit). When integrated into LIMS or ELN workflows, these logs support 21 CFR Part 11-compliant electronic records when paired with validated third-party acquisition software. All parameter settings—including timer values and voltage configuration—are hardware-locked and non-volatile, ensuring configuration integrity between power cycles. Calibration certificates reference NIST-traceable stopwatch standards and are provided with each unit shipment.
Applications
- Pharmaceutical: Granule size distribution analysis for tablet compression qualification per USP and ICH Q5A.
- Materials Science: Particle size verification of additive manufacturing feedstocks (e.g., Ti-6Al-4V, Inconel 718) prior to laser powder bed fusion.
- Food & Agriculture: Flour classification, spice grinding validation, and feed pellet consistency testing per AOAC 992.03.
- Geotechnical & Mining: Soil gradation analysis (ASTM D422, D6913) and crushed aggregate QC in accordance with AASHTO T 27.
- Chemicals & Catalysts: Verification of supported catalyst particle integrity after calcination or impregnation steps.
FAQ
What voltage configurations does the SS-25F support?
The SS-25F is factory-configured for 220 V / 50 Hz operation and complies with IEC 60034-1 insulation class B ratings. A separate 115 V / 60 Hz variant (SS-25) is available for North American markets.
Can the SS-25F be validated under GMP conditions?
Yes—its mechanical repeatability, timer traceability, and absence of firmware-dependent logic make it inherently suitable for IQ/OQ/PQ execution. Full validation support documentation is available upon request.
Is sieve calibration included with purchase?
No—test sieves must be procured separately and certified per ASTM E11 Section 7 or ISO 3310-1 Clause 6. We recommend annual recalibration by an ISO/IEC 17025-accredited laboratory.
What maintenance is required?
Biannual inspection of hammer pivot bearings, cleaning of dust seals, and verification of timer accuracy using a NIST-traceable time standard. No lubrication of the drive train is required.
Does the unit include a test sieve set?
No—sieves are ordered separately based on application-specific mesh specifications. Common configurations include #10–#200 stainless steel stacks for general QC or #325–#635 nylon for fragile organic materials.
