ROCKER LF3a PES Vacuum Filtration Funnel

Overview

The ROCKER LF3a PES Vacuum Filtration Funnel is an engineered solution for high-efficiency, sterile-grade liquid processing in life science laboratories. Designed around a precision-matched 300 mL PES (polyethersulfone) funnel assembly, it operates on vacuum-driven dead-end filtration principles—ideal for microbial enumeration, cell harvesting, clarification of culture supernatants, and preparation of sterile filtrates prior to analytical or downstream applications. Its all-PES construction ensures chemical resistance to common solvents, buffers, and disinfectants, while maintaining structural integrity under thermal stress. Unlike conventional clamped funnels requiring external fixtures, the LF3a integrates a proprietary rotary snap-lock coupling (Taiwan Patent No. M381450), enabling rapid, tool-free assembly with leak-tight sealing validated at ≤–80 kPa vacuum pressure. The system supports full autoclave compatibility—verified for ≥20 cycles at 121°C, 20 minutes per cycle—without dimensional drift or loss of seal integrity.

Key Features

• Autoclavable PES Construction: Funnel cup and base fabricated from medical-grade polyethersulfone, rated for continuous exposure up to 180°C and validated for repeated steam sterilization at 121°C without hydrolysis or embrittlement.
• Rotary Snap-Lock Coupling (Patent TW M381450): Eliminates need for metal clamps or O-ring compression tools; achieves uniform radial sealing force via quarter-turn engagement between cup and base, reducing operator variability and setup time by >60% versus traditional systems.
• Optimized Membrane Spacer Design: Patented PP membrane support plate features micro-channel flow paths that minimize boundary layer resistance, increasing filtration flux by up to 35% compared to flat-surface spacers—particularly advantageous for viscous or particulate-laden samples.
• Integrated Tissue Culture Bottle Adapter (Cat. No. 197000-38): Polycarbonate adapter enables direct mounting onto standard 125–500 mL vented or non-vented TC flasks (e.g., Corning, Falcon), eliminating intermediate transfer steps and minimizing contamination risk during sterile filtration of conditioned media or transfection reagents.
• Modular Component System: Fully interoperable with ROCKER’s ecosystem—including 47 mm PES membranes (e.g., 0.22 µm or 0.45 µm pore size), optional PP lid (Cat. No. 197000-01), and standardized 8 mm ID vacuum tubing—ensuring seamless integration into existing vacuum manifolds or benchtop pumps.

Sample Compatibility & Compliance

The LF3a is validated for use with aqueous solutions, buffered saline, cell culture media (including serum-containing formulations), antibiotics, and low-concentration protein solutions. It is not recommended for strong oxidizers (e.g., >5% sodium hypochlorite), concentrated organic acids, or halogenated hydrocarbons. All components comply with USP Class VI biological safety testing requirements. The design supports adherence to CLSI M22-A3 guidelines for membrane filtration-based sterility testing and aligns with ISO 13485 quality system expectations for reusable labware used in regulated environments. When paired with certified low-protein-binding PES membranes, the system meets criteria for endotoxin-free processing per USP .

Software & Data Management

As a standalone passive filtration device, the LF3a requires no embedded firmware or software interface. However, its modular architecture facilitates traceability within digital lab workflows: component lot numbers (e.g., 197000-02 for LF3a funnel, 197000-37 for spacer) are laser-etched for audit-ready identification. Laboratories implementing electronic lab notebooks (ELN) or LIMS may log usage parameters—including filter type, batch number, sterilization cycle count, and sample volume—against standardized SOP templates aligned with FDA 21 CFR Part 11 data integrity principles.

Applications

• Sterility testing of pharmaceutical intermediates and final drug products per USP and Ph. Eur. 2.6.1
• Microbial load assessment in water, beverages, and cosmetics per ISO 8589 and AOAC 977.27
• Harvesting suspension-adapted mammalian cells (e.g., CHO, HEK293) prior to centrifugation or chromatography
• Clarification of lentiviral or AAV vector preparations prior to ultrafiltration/diafiltration
• Routine filtration of HPLC mobile phases and buffer stocks in QC/QA labs
• Pre-filtration of environmental samples (e.g., wastewater, soil extracts) prior to ICP-MS or GC-MS analysis

FAQ

Can the LF3a be used with 0.1 µm pore size membranes?
Yes—provided the membrane diameter is 47 mm and manufactured from compatible materials (e.g., PES, PVDF, or nylon). Note that lower pore sizes increase backpressure; verify vacuum source capacity (≥–85 kPa recommended).

Is the tissue culture adapter compatible with non-vented flasks?
Yes, but only for non-sterile or closed-system applications. For sterile filtration, use only with vented TC flasks equipped with hydrophobic 0.2 µm filters.

How many autoclave cycles can the LF3a withstand before replacement?
Accelerated aging studies indicate ≥25 validated cycles at 121°C, 20 min without measurable degradation in seal performance or mechanical strength. Routine visual inspection for clouding or cracking is recommended after cycle 20.

Does ROCKER provide validation documentation for GMP environments?
Yes—Certificate of Conformance, material biocompatibility reports (ISO 10993-5/-10), and autoclave cycle validation summaries are available upon request for qualified customers under NDA.