Rocker VF7 Glass Filtration Assembly
| Brand | Rocker |
|---|---|
| Origin | Taiwan |
| Model | VF7 |
| Funnel Capacity | 300 mL |
| Receiver Bottle Capacity | 1000 mL |
| Compatible Filter Diameter | 47 mm |
| Hose Inner Diameter | 8 mm (5/16 in.) |
| Effective Filtration Area | 9.6 cm² |
| Funnel & Receiver Material | Borosilicate Glass |
| Filter Support | Stainless Steel Mesh + PTFE Gasket |
| Stopper | Silicone (No. 8) |
| Pricing | USD 360 (FOB Taiwan, ex-works) |
Overview
The Rocker VF7 Glass Filtration Assembly is a modular, vacuum-driven laboratory filtration system engineered for reproducible, low-contamination solid–liquid separation across routine life science and quality control workflows. Designed around the Couette-type vacuum filtration principle—where differential pressure drives sample through a supported membrane—the VF7 integrates borosilicate glass components with chemically inert stainless steel and PTFE interfaces to ensure compatibility with aggressive solvents (e.g., acetone, chloroform, ethanol), aqueous buffers, and mildly acidic or basic solutions. Its standardized 47 mm filter diameter interface aligns with globally accepted membrane formats (including mixed cellulose ester, nylon, PVDF, and PTFE), enabling seamless integration into GLP-compliant sample preparation pipelines for microbiology, environmental analysis, pharmaceutical QC, and bioprocess monitoring. The system operates under typical vacuum levels of –0.8 to –0.95 bar, delivering consistent flow rates without membrane rupture or channeling—critical for quantitative recovery of particulates or microorganisms.
Key Features
- Borosilicate glass construction (funnel upper cup, base, and 1000 mL receiver bottle) certified to ISO 3585 standards, offering thermal shock resistance up to 120 °C and hydrolytic class HGB 1.
- Reusable stainless steel mesh support (316L grade) with integrated PTFE gasket ensures uniform membrane seating, eliminates glass frit clogging, and withstands repeated autoclaving (121 °C, 20 min, 15 psi).
- No. 8 medical-grade silicone stopper provides secure, leak-tight sealing and complies with USP Class VI biological safety requirements.
- Optimized 9.6 cm² effective filtration area balances throughput and retention efficiency for standard 47 mm membranes—validated per ASTM F838-22 for bacterial challenge testing.
- Modular component labeling (e.g., 167200-07, 167120-33) enables traceable inventory management and replacement part sourcing aligned with Rocker’s global spare parts catalog.
Sample Compatibility & Compliance
The VF7 assembly supports filtration of diverse sample matrices including microbial suspensions (e.g., E. coli, yeast, spores), colloidal dispersions, cell culture supernatants, soil extracts, and solvent-based reagent solutions. Its material compatibility profile conforms to ISO 10993-5 (cytotoxicity) and USP (biological reactivity), making it suitable for pre-filtration steps in USP sterility testing and ISO 11737-1 viable particle enumeration. When used with certified low-protein-binding membranes, the system meets ICH Q5A requirements for viral clearance validation studies. All glassware is manufactured under ISO 9001-certified processes; stainless steel components comply with EN 10088-1 specifications.
Software & Data Management
As a manually operated, non-electronic filtration system, the VF7 requires no embedded firmware or software. However, its standardized geometry and component IDs facilitate digital workflow integration: barcode-labeled parts (e.g., 167250-03 receiver bottle) are compatible with LIMS platforms such as LabVantage and STARLIMS via configurable asset tracking modules. Filter lot numbers and sterilization logs (autoclave cycle parameters, operator ID, date/time) can be recorded in electronic lab notebooks (ELNs) compliant with 21 CFR Part 11 when paired with audit-trail-enabled systems. Rocker provides PDF-based calibration certificates and material traceability documentation upon request.
Applications
- Microbial analysis: Filtration of water, beverages, or pharmaceutical rinsates prior to membrane filtration assays (ISO 9308-1, APHA 9222B).
- Solvent purification: Removal of particulate contaminants from HPLC-grade acetonitrile, methanol, or THF prior to chromatographic use.
- Cell debris clarification: Pre-clearing of lysates or fermentation broths before centrifugation or chromatography.
- Environmental monitoring: Solid-phase extraction of suspended solids from wastewater or surface water samples (EPA Method 160.1).
- Quality control: Routine particulate testing of injectables or ophthalmic solutions per USP .
FAQ
Can the stainless steel mesh support be autoclaved?
Yes—316L stainless steel and PTFE gaskets are rated for repeated autoclaving at 121 °C, 15 psi for 20 minutes. Avoid alkaline cleaning agents above pH 12 to prevent passive layer degradation.
Is the VF7 compatible with vacuum manifolds from other manufacturers?
Yes—its 5/16 in. (8 mm) hose inlet conforms to ISO 8536-4 tubing standards and interfaces with common vacuum regulators (e.g., Millipore® Vacuum Manifold, Thermo Fisher™ Nalgene™ Manifolds).
What filter types are validated for use with the VF7?
All standard 47 mm diameter membranes—including sterile-grade nitrocellulose, hydrophilic PTFE, and low-binding PVDF—are mechanically and chemically compatible. Rocker recommends pre-wetting hydrophobic membranes with alcohol prior to aqueous filtration.
Does Rocker provide certification documentation for regulatory submissions?
Yes—material declarations (RoHS, REACH), borosilicate glass compliance reports (DIN ISO 3585), and sterilization validation templates are available upon order confirmation for FDA or EMA audit support.
