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 standardized dry sieve analysis in quality control, R&D, and regulatory testing laboratories. Operating on the principle of combined rotational motion and controlled tapping—per ASTM E11, ISO 3310-1, and USP <786>—the SS-25F subjects particulate samples to a reproducible 45° inclined circular rotation coupled with synchronized vertical impact (tapping), enabling efficient stratification and separation across a broad particle size distribution. Its robust cast aluminum housing with hardwood-finished frame ensures mechanical stability during extended sieving cycles, while the fully enclosed cabinet—configurable for left- or right-side door mounting—minimizes airborne dust exposure and supports GLP-compliant lab environments.
Key Features
- Motor-driven rotary-tap mechanism delivering consistent 45° inclination and calibrated impact frequency for high inter-laboratory reproducibility
- No-clamp stack assembly: accommodates up to 26 in (660 mm) tall sieve columns without mechanical clamping—reducing setup time and operator variability
- Dual sieve diameter compatibility: accepts standard 8 in (203 mm) and 12 in (305 mm) test sieves per ASTM E11 and ISO 3310-1 specifications
- Precision digital timer with ±1 second accuracy and 1–99 minute programmable duration, supporting multi-stage sequential sieving protocols
- Integrated support stand functions both as vibration-dampening base and dedicated sieve storage rack—optimized for space-constrained labs
- Universal power configuration: SS-25F variant engineered for 220 V / 50 Hz operation, compliant with IEC 61000-4 electromagnetic compatibility standards
Sample Compatibility & Compliance
The SS-25F is validated for dry, free-flowing, non-cohesive granular materials—including pharmaceutical powders, mineral aggregates, catalysts, food ingredients, and ceramic precursors—within the nominal particle size range of No. 4 to No. 635 (4.75 mm down to 20 µm). It supports full compliance with sieve frame dimensional tolerances specified in ASTM E11 Annex A1 and ISO 3310-1 Table 1. All operational parameters—including tilt angle, rotational speed, tap amplitude, and dwell time—are fixed per design to ensure method equivalence across installations. The unit is suitable for use in FDA-regulated facilities where sieve analysis forms part of dissolution, content uniformity, or granulation process validation under 21 CFR Part 211.
Software & Data Management
The SS-25F operates as a standalone electromechanical instrument with no embedded firmware or software interface. All timing and actuation logic are managed via hardened digital circuitry, eliminating dependency on external PCs or proprietary drivers. For audit-trail compliance, users may integrate the sifter into broader LIMS or ELN workflows using manual entry of test parameters (e.g., sieve stack configuration, duration, operator ID) and recorded mass-on-sieve results. Optional calibration verification kits—including certified reference sieve sets traceable to NIST SRM 2822—are available to support annual performance qualification (PQ) and IQ/OQ documentation per GMP Annex 15 requirements.
Applications
- Pharmaceutical: Excipient particle sizing for blend uniformity assessment and tablet compression risk evaluation
- Construction Materials: Gradation analysis of fine aggregates, cement, and fly ash per ASTM C136 and EN 933-1
- Chemicals & Catalysts: Verification of catalyst pellet size distribution prior to reactor loading
- Food & Agriculture: Flour fineness testing (e.g., USDA Grain Inspection Handbook Ch. 5), spice particle homogeneity checks
- Academic Research: Method development for sieve cascade modeling and segregation behavior studies under controlled shear history
FAQ
What sieve diameters does the SS-25F accept?
The SS-25F accommodates standard 8 in (203 mm) and 12 in (305 mm) diameter test sieves, compatible with ASTM E11 and ISO 3310-1 frame dimensions.
Is the SS-25F compliant with FDA 21 CFR Part 11?
As a non-software-based instrument, the SS-25F does not fall under electronic record/electronic signature requirements; however, its mechanical consistency and timer accuracy support ALCOA+ data integrity principles when paired with documented SOPs.
Can the sieve stack height be adjusted?
Yes—the unit supports variable-height configurations: full-height (up to 26 in / 660 mm), half-height, and mid-height stacks—with corresponding maximum sieve counts (e.g., 10 × 8-in or 6 × 12-in at full height).
Does the SS-25F require periodic recalibration?
No routine recalibration is required; however, annual verification of timer accuracy (±1 sec), rotational speed stability, and tap amplitude consistency is recommended per laboratory quality management system protocols.
What safety certifications does the SS-25F carry?
The SS-25F conforms to UL 61010-1 (2nd Ed.) and CE marking requirements for laboratory electrical equipment, including protection against electric shock, mechanical hazards, and thermal overloads.
