Rocker BioVac 321B Vacuum Filtration System

Overview

The Rocker BioVac 321B Vacuum Filtration System is an integrated, benchtop-ready solution engineered for high-throughput microbial analysis and routine liquid clarification in life science laboratories. Designed around the principles of controlled vacuum-driven membrane filtration, the system enables simultaneous processing of three samples under consistent negative pressure—critical for standardized colony-forming unit (CFU) enumeration per ISO 7218, USP , and AOAC Official Methods. Its core architecture integrates a maintenance-free oil-free diaphragm vacuum pump (Rocker 400), a tri-port anodized aluminum filter manifold, three precision-machined stainless steel (316L) funnels with patented twist-lock sealing, a polycarbonate waste reservoir, and supporting accessories including electronic ignition for sterile flame sterilization of funnel rims. Unlike modular setups requiring component alignment or clamping, the BioVac 321B delivers operational consistency through mechanical repeatability and material compatibility with common microbiological reagents, alcohols, and mild disinfectants.

Key Features

• Tri-channel parallel filtration architecture enabling concurrent processing of up to three 100 mL samples—reducing assay turnaround time and minimizing inter-sample variability.
• Anodized aluminum filter holder with corrosion-resistant surface finish (hard-anodized per MIL-A-8625 Type III), ensuring long-term dimensional stability and resistance to repeated ethanol wiping and UV exposure.
• Stainless steel (316L) funnels featuring Rocker’s patented twist-lock coupling mechanism (Taiwan Patent No. M381450), eliminating the need for auxiliary clamps and guaranteeing leak-tight seal integrity at vacuum levels up to −85 kPa.
• Rocker 400 oil-free diaphragm pump delivering stable vacuum output (ultimate vacuum: ≤−85 kPa; flow rate: 25 L/min), certified to meet IEC 61000-6-3 EMC standards and suitable for continuous operation in GLP-compliant environments.
• Included Pall GN-6 mixed cellulose ester (MCE) membranes (0.45 µm pore size, 47 mm diameter), pre-sterilized and validated for bacterial retention efficiency per ASTM F838-22, with low protein binding and uniform pore distribution.
• Dragon 100 electronic ignition Bunsen burner with piezoelectric spark generation, enabling rapid, flame-consistent sterilization of funnel rims between runs—supporting aseptic technique without manual match lighting.

Sample Compatibility & Compliance

The BioVac 321B supports aqueous suspensions, buffered saline solutions (e.g., PBS, peptone water), nutrient broths (TSA, PCA), and low-viscosity industrial process streams. It is not intended for solvents with vapor pressures exceeding 20 kPa at 20 °C (e.g., acetone, chloroform) or highly viscous fluids (>50 cP). All wetted components comply with USP Class VI biocompatibility requirements. The system aligns with regulatory expectations for equipment used in pharmaceutical microbiological testing: its design facilitates cleaning validation (no dead-leg geometry), traceable calibration (pump vacuum output verifiable with digital manometer), and audit-ready documentation via included serial-numbered components. The anodized aluminum manifold and 316L funnels withstand repeated autoclaving (121 °C, 15 psi, 20 min), supporting reuse under GMP Annex 1 environmental monitoring protocols.

Software & Data Management

The BioVac 321B operates as a standalone hardware platform with no embedded firmware or digital interface. Data integrity is maintained through procedural documentation: users record vacuum pressure (via optional external gauge), filtration duration, membrane lot numbers, and sample identifiers in laboratory notebooks or LIMS-compatible spreadsheets. The included components support full traceability—each item bears a unique part number (e.g., 167400-11 for Rocker 400, 167200-43 for filter holder) enabling asset tracking and service history logging. For FDA 21 CFR Part 11 compliance, integration with validated electronic lab notebooks (ELN) or chromatography data systems (CDS) is achieved via manual entry of run parameters and photographic evidence of membrane colony growth post-filtration.

Applications

• Quantitative microbial enumeration in drinking water, pharmaceutical water systems (PW, WFI), and environmental monitoring swab rinsates per ISO 9308-1 and EP 2.6.12.
• Pre-filtration of cell culture supernatants prior to downstream concentration or chromatographic analysis.
• Clarification of fermentation broths and enzyme reaction mixtures in bioprocess development labs.
• Particulate removal from buffer stocks and reagent solutions in QC/QA laboratories performing compendial testing.
• Standardized filtration in academic teaching labs conducting bacteriology modules aligned with ASM curriculum guidelines.

FAQ

Is the Rocker 400 vacuum pump suitable for continuous duty cycles in high-volume labs?
Yes—the Rocker 400 is rated for uninterrupted operation up to 8 hours per day at ambient temperatures ≤35 °C, with thermal overload protection and brushless motor design ensuring longevity under sustained load.
Can I use alternative membrane types (e.g., PVDF, nylon) with the BioVac 321B funnels?
Yes—funnels accept standard 47 mm diameter membranes; however, hydrophobic membranes require pre-wetting with alcohol, and low-binding variants (e.g., PVDF) may necessitate protocol validation for recovery efficiency.
Does the 2-year warranty cover labor costs for on-site service?
The warranty includes parts replacement only; labor and field service are available under separate annual service agreements.
Are replacement funnels and filter holders available as individual SKUs?
Yes—all components are sold separately: 167103-10 (funnel), 167200-43 (holder), 167200-33 (waste bottle), and 177100-00 (burner) are stocked globally through Rocker authorized distributors.
How is sterility maintained during multi-user lab deployment?
The anodized aluminum holder and 316L funnels support autoclaving; silicone tubing and PC waste bottles are single-use or validated for repeated chemical disinfection (e.g., 70% IPA, 0.5% sodium hypochlorite).