Placing a vibratory screener in a regulated food or pharmaceutical manufacturing environment requires more than simply choosing a stainless steel machine. The FDA's current Good Manufacturing Practice (cGMP) regulations place specific requirements on equipment construction, design, cleanability, and documentation — requirements that have direct implications for how you specify, qualify, and maintain your screener. Failing to meet these requirements does not just create regulatory risk; it creates product quality risk and the potential for costly failures during FDA inspections.
This article provides a comprehensive review of the FDA cGMP regulations that apply to vibratory screening equipment — 21 CFR Part 110 (food), 21 CFR Part 111 (dietary supplements), 21 CFR Part 211 (pharmaceutical), and FSMA Preventive Controls — with specific guidance on what each regulation requires from the screener and its supporting documentation. Whether you are purchasing a new SiftPro 24 for a pharmaceutical tableting operation or specifying a SiftPro 48 for a food ingredient plant, this guide tells you exactly what your screener must be and what records you must maintain.
Overview of Applicable FDA Regulations
21 CFR Part 110 — Current Good Manufacturing Practice in Manufacturing, Packing, or Holding Human Food
Part 110 is the baseline GMP regulation for human food manufacturing. Section 110.40 (Equipment and Utensils) requires that all food-contact surfaces be constructed of safe materials (non-toxic, non-porous, corrosion-resistant) and be maintained in a clean and sanitary condition. Equipment must be designed and constructed to be cleanable. The regulation does not specify exact materials or surface finishes, but FDA inspectional guidance and industry practice have established 304 or 316 SS as the standard for food-contact equipment in most applications.
21 CFR Part 111 — Current Good Manufacturing Practice in Manufacturing, Packaging, Labeling, or Holding Operations for Dietary Supplements
Part 111 applies to dietary supplement manufacturers. Section 111.27 (Equipment and Utensils) sets requirements parallel to Part 110 but with additional emphasis on equipment qualification and performance — equipment must perform its intended function consistently. Part 111 also requires written procedures for equipment cleaning and maintenance (111.15), equipment logs for major equipment (111.35), and documentation that equipment meets specifications at time of use (111.25).
21 CFR Part 211 — Current Good Manufacturing Practice for Finished Pharmaceuticals
Part 211 is the most detailed and prescriptive cGMP regulation for equipment in food-related manufacturing. Key sections applicable to vibratory screeners:
- 211.65 (Equipment Construction): Product-contact surfaces must not be reactive, additive, or absorptive so as to alter product safety, identity, strength, quality, or purity.
- 211.67 (Equipment Cleaning and Maintenance): Written procedures required for cleaning and maintenance; records of cleaning required; equipment must be cleaned at appropriate intervals to prevent contamination.
- 211.68 (Automatic, Mechanical, and Electronic Equipment): Equipment must be routinely calibrated, inspected, or checked; records of these activities must be maintained.
- 211.105 (Equipment Identification): Equipment used for manufacturing/processing must be identified with respect to contents, batch information, and phase of manufacturing as appropriate.
FSMA — Food Safety Modernization Act Preventive Controls Rules
FSMA significantly expanded FDA's authority over food safety. Two rules are most relevant to vibratory screener operations:
- 21 CFR Part 117 (Preventive Controls for Human Food): Requires a written Food Safety Plan including Hazard Analysis, Preventive Controls, Monitoring, Corrective Actions, and Verification. Where a screener performs a physical hazard control (foreign body removal), FSMA requires monitoring of that control and maintenance of monitoring records.
- 21 CFR Part 507 (Preventive Controls for Animal Food): Parallel requirements for pet food and animal feed manufacturing. Applies to any screener used in the production of animal food.
Equipment Construction Requirements
Materials of Construction
For food and pharmaceutical screeners, the following material standards apply by regulation and by industry consensus:
| Component | Minimum Standard (Food) | Minimum Standard (Pharma) | Preferred Specification |
|---|---|---|---|
| Screen body (product contact) | 304 SS; smooth, non-porous | 316L SS | 316L SS, electropolished Ra ≤ 20 µin |
| Screen cloth and frame | 304 SS or 316 SS | 316 SS minimum; 316L preferred | 316L SS cloth and frame; MTC on file |
| Gaskets/seals (product contact) | FDA 21 CFR 177.2600 compliant | FDA 21 CFR 177.2600; USP Class VI elastomer | Platinum-cured silicone or EPDM; USP Class VI |
| Non-contact structural parts | 304 SS or painted steel | 304 or 316 SS preferred | 304 SS standard; avoid painted surfaces near product |
| Lubricants (motor bearings) | Food-grade lubricant (H1) if incidental contact possible | Food-grade H1 lubricant | NSF H1 registered grease; document type and frequency |
Design Requirements
Beyond material selection, design features must facilitate cleaning to the standard required by the regulation:
- All product-contact surfaces must be accessible for inspection and cleaning — no enclosed cavities in the product zone that cannot be reached by cleaning tools or CIP spray devices.
- Surfaces must slope to drain — no horizontal surfaces in the product zone where liquids can pool.
- No threads, crevices, or overlapping joints in product contact zones (see Sanitary vs. Industrial Screeners for detailed design feature comparison).
- Discharge spouts and product outlets must be self-draining and cleanable.
Documentation Requirements
Equipment-Level Documentation
At the time of purchase and installation, the following documentation should be collected and maintained in the equipment file:
- Equipment data sheet (model, serial number, motor data, operating parameters)
- Material test certificates (MTC/CoC) for all 316L SS components
- Surface finish measurement records (Ra values for product-contact surfaces)
- Weld inspection records (visual inspection, grind/polish completion)
- Elastomer compliance documentation (FDA 21 CFR 177.2600; USP Class VI if applicable)
- 3-A compliance letter (if applicable)
- Dimensional drawings (for IQ verification)
- Manufacturer's operation and maintenance manual
Cleaning Records
21 CFR 211.67 requires that written procedures for equipment cleaning be established and followed, and that records be maintained. For a pharmaceutical screener, the cleaning record must include at minimum: equipment identification, date and time of cleaning, name of the person performing the cleaning, cleaning agent name and concentration, cleaning method reference (SOP number and version), and signature of the person verifying cleanliness. For FSMA food facilities, records of sanitation monitoring activities must be kept for at least 2 years.
Screen Inspection Log
A screen inspection log specific to each screener documents the integrity of the screen cloth — the critical component that performs the physical separation function. Required entries include: date screen installed, screen identification (supplier lot number, mesh specification, material), results of incoming inspection (visual, dimensional), date screen removed, reason for removal (scheduled replacement, damage found, failure), and inspection results at removal. This log is a required record under FSMA for screeners performing physical hazard control functions, and is best practice under 21 CFR Part 111 and Part 211.
Screen Qualification and Validation
Incoming Inspection
All replacement screens for GMP pharmaceutical applications should undergo documented incoming inspection before installation. Minimum incoming inspection criteria:
- Visual inspection — no holes, distortion, or damage to cloth or frame
- Dimensional verification — OD, cloth diameter, frame height match specification
- Mesh count verification — count mesh openings per linear inch and compare to specification
- Material verification — confirm 316L SS (or 304 SS as specified) via material certificate review
- Wire diameter check — spot-measure wire diameter and compare to specification
- Lot number and certificate of conformance on file before use
Installation Qualification (IQ) Elements for a Vibratory Screener
A new pharmaceutical screener installation requires a documented IQ before use in production. Key IQ verification points:
| IQ Check Point | Acceptance Criterion | Verification Method |
|---|---|---|
| Equipment identification | Serial/model number matches purchase order | Physical inspection vs. nameplate |
| Contact surface material | 316L SS (or per specification) | Material test certificate review |
| Surface finish | Ra ≤ 20 µin (or per specification) | Profilometer measurement; document locations measured |
| Weld integrity | Welds ground flush; no visible crevices, pits, or undercuts | Visual inspection; borescope for enclosed areas |
| Gasket material | FDA 21 CFR 177.2600 / USP Class VI compliant | Certificate of compliance review |
| Motor voltage/frequency | Matches nameplate specification | Electrician verification; measured voltage at panel |
| Motor rotation direction | Clockwise (or as specified for machine type) | Observation at jog; direction marked on motor cover |
| Screen specification installed | Mesh, wire diameter, material match IQ specification | Physical measurement vs. specification; MTC on file |
| Utility connections | Grounding continuity verified; no exposed wiring | Electrician continuity test |
Risk-Based Approach to Equipment Qualification
Not all screeners require the same depth of qualification. A risk-based approach allocates qualification effort proportionally to the potential impact of the equipment on product quality and patient or consumer safety. Factors that increase qualification scope:
- Direct product contact surfaces (versus non-contact structural components)
- Screener performs a critical process step (foreign body removal as a HACCP CCP or FSMA Preventive Control)
- Product is a sterile pharmaceutical API or finished drug product
- Screening at a fine cut point critical to product specification (particle size specification)
- Allergen management — screener shared between allergen-containing and allergen-free products
Factors that may reduce qualification scope: screener used only for scalping/oversize removal on a bulk commodity; product is a non-drug, non-food material; screener is not a critical control point in the food safety plan.
ScreenerKing Documentation Support
ScreenerKing supports pharmaceutical and food customers with a complete documentation package for GMP qualification. Available documentation includes: dimensional drawings, material test certificates for all 316L SS components, surface finish measurement reports, elastomer compliance letters, weld inspection records, 3-A compliance letters (where applicable), and IQ template protocol customized to the specific machine model.
Contact ScreenerKing's technical team via the contact page to request the documentation package for your specific machine configuration. Documentation requests are typically fulfilled within 2–3 business days for standard configurations.