Rocker Lafil 400–LF 30 Vacuum Filtration System

Overview

The Rocker Lafil 400–LF 30 Vacuum Filtration System is an integrated, benchtop-compatible solution engineered for precision and safety in routine life science laboratories. Designed around a compact, self-contained architecture, it combines a high-efficiency diaphragm vacuum pump with a fully sterilizable filtration assembly—eliminating the need for external vacuum sources or complex hose routing. Its operation relies on controlled negative pressure generation to drive liquid samples through microporous membranes, enabling rapid separation of suspended solids, microorganisms, or particulates from aqueous or low-viscosity biological matrices. The system adheres to fundamental principles of dead-end filtration, where sample volume reduction, membrane integrity preservation, and operator ergonomics are prioritized without compromising reproducibility. With a maximum achievable vacuum level of 720 mmHg and a stable flow rate of 37 L/min, the Lafil 400–LF 30 delivers consistent performance across standardized protocols such as ASTM D5907 (suspended solids), ISO 7218 (microbiological examination), and USP <71> (sterility testing).

Key Features

• Integrated Safety Platform: A recessed, fence-style waste bottle cradle prevents accidental displacement during active filtration—critical in high-throughput microbiology labs where multiple users share limited bench space.
• Sterilization-Ready Construction: The funnel upper cup is injection-molded from polyethersulfone (PES), rated for repeated autoclaving at 121°C for 20 minutes (validated per ISO 17665-1), ensuring compliance with GLP/GMP environmental monitoring workflows.
• Modular Waste Handling: The included waste extraction adapter allows immediate repurposing of the 1200 mL polycarbonate waste bottle as a dedicated effluent reservoir—enabling seamless transition between sterile filtration and non-sterile bulk liquid removal.
• Overflow Protection Mechanism: An internal float valve activates at 95% fill level to automatically interrupt vacuum draw, preventing cross-contamination and safeguarding pump integrity.
• Optimized Filtration Dynamics: The patented polypropylene membrane support plate features radial micro-channeling that enhances laminar flow distribution across the full 12.5 cm² effective area—reducing filtration time by up to 30% compared to flat-bottom alternatives under identical pressure differentials.
• Protected Inlet Air Path: Each unit incorporates a replaceable dual-stage inlet filter (particulate + coalescing) upstream of the diaphragm chamber, extending service intervals and maintaining volumetric consistency across >5,000 operating hours (per manufacturer lifecycle data).

Sample Compatibility & Compliance

The Lafil 400–LF 30 accommodates standard 47 mm and 50 mm diameter membranes—including mixed cellulose ester (MCE), nylon, PVDF, and PTFE—across a wide range of pore sizes (0.1 µm to 8.0 µm). It supports filtration of culture broths, water samples, cell lysates, clarified fermentation supernatants, and buffered saline solutions. All wetted components comply with USP Class VI biocompatibility standards and are free of leachable heavy metals (tested per ICH Q3D). The system meets CE marking requirements under Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), and its design facilitates audit readiness for FDA 21 CFR Part 11–aligned environments when paired with validated electronic logbooks.

Software & Data Management

This is a standalone, manually operated vacuum filtration system with no embedded firmware or digital interface. All operational parameters—including run duration, membrane lot numbers, sample IDs, and sterilization cycles—are documented externally via laboratory notebooks or LIMS-integrated forms. The mechanical design inherently supports ALCOA+ data integrity principles: attributable (user-labeled bottles), legible (etched volume markings), contemporaneous (real-time manual logging), original (primary record retention), accurate (calibrated vacuum gauge), complete (full workflow traceability), consistent (standardized SOP execution), enduring (chemical-resistant labeling surfaces), and available (archivable physical records).

Applications

• Suspended solids quantification in wastewater, drinking water, and process streams per EPA Method 160.2 and ISO 11923.
• Aerobic plate count (APC), coliform enumeration, and membrane filtration-based pathogen isolation (e.g., E. coli, Pseudomonas aeruginosa) per ISO 4833-2 and FDA BAM Chapter 3.
• Pre-filtration of cell culture media prior to sterile filtration using 0.22 µm membranes.
• Clarification of protein solutions and nucleic acid preparations prior to downstream chromatography or electrophoresis.
• Routine QC sampling in pharmaceutical water systems (PW, WFI) per USP <1231> and EU Annex 1.

FAQ

Can the Lafil 400–LF 30 be used with organic solvents?
No. The PES funnel cup and silicone stopper are incompatible with acetone, chloroform, THF, and other halogenated or ketonic solvents. Use only aqueous or alcohol-based (≤70% ethanol) solutions.
Is the vacuum pump oil-free?
Yes. It employs a maintenance-free, corrosion-resistant PTFE-coated diaphragm and stainless-steel valve assembly—eliminating lubricant contamination risks.
What is the warranty coverage?
Rocker provides a 24-month limited warranty covering parts and labor for defects in materials or workmanship under normal laboratory use.
How often should the inlet filter be replaced?
Under typical biosafety cabinet or cleanroom conditions, replacement is recommended every 6 months or after 1,000 operating hours—whichever occurs first.
Are replacement membranes and accessories available through global distributors?
Yes. All consumables—including LF 30 filter assemblies (P/N 197010-30), spare stoppers, and inlet filters—are stocked by Rocker’s authorized partners in North America, EMEA, and APAC regions.