ROCKER SF30 Stainless Steel Filtration Bottle Assembly

Overview

The ROCKER SF30 Stainless Steel Filtration Bottle Assembly is a precision-engineered, laboratory-grade vacuum filtration system designed for reproducible, contamination-controlled sample processing in life science and bioprocessing workflows. Built upon Couette-flow-compatible vacuum-driven filtration principles, the SF30 integrates a corrosion-resistant SS316 stainless steel funnel with a high-clarity, autoclavable polycarbonate receiver bottle—enabling seamless transition between sterile filtration, solvent-resistant purification, and high-throughput microbial recovery applications. Its modular twist-lock architecture eliminates reliance on external clamps or O-ring-dependent sealing, reducing assembly time by over 30% while maintaining consistent leak-tight integrity under sustained vacuum (up to –85 kPa). The system complies with fundamental design expectations outlined in ISO 8573-1 (compressed air purity for lab instrumentation) and supports GLP-compliant documentation when integrated with validated vacuum sources and filter membranes.

Key Features

• SS316 Stainless Steel Funnel Assembly: Comprising funnel cup, base, and membrane support plate—all machined from medical-grade AISI 316 stainless steel—ensuring resistance to chloride-induced pitting, organic solvents, and repeated flame sterilization without surface degradation.
• Autoclavable Polycarbonate Receiver Bottle: 1200 mL capacity bottle manufactured via precision injection molding; withstands standard steam sterilization cycles (121°C, 20 min, 100 kPa) without warping or hydrolytic degradation; certified to USP Class VI biological safety standards.
• Integrated Overflow Protection: A passive float-valve mechanism automatically seals the vacuum port upon liquid reaching the 1200 mL fill line, preventing cross-contamination of vacuum lines and protecting downstream pumps from liquid ingress.
• Twist-Lock Connection System: Tool-free, rotational coupling between funnel and receiver ensures rapid, repeatable alignment with ±0.1 mm positional tolerance; eliminates torque variability associated with clamp-based systems and improves inter-operator consistency.
• Waste Extraction Adaptor: Removable cap with Luer-lock interface enables immediate conversion of the receiver into a waste collection vessel compatible with standard peristaltic or vacuum-assisted waste management systems.
• Calibrated Funnel Scale: Laser-etched 100 mL graduations on the funnel body allow real-time volume monitoring during filtration—critical for process validation in QC microbiology and buffer exchange protocols.

Sample Compatibility & Compliance

The SF30 is validated for use with standard 47 mm diameter membrane filters (cellulose acetate, PVDF, PTFE, nylon, and mixed ester types) across pH 1–14 and temperatures up to 60°C during operation. Its SS316 wetted surfaces meet ASTM F899 requirements for surgical stainless steel and are compatible with USP particulate matter testing preparations. When paired with certified low-protein-binding membranes, the assembly supports ISO 13408-1 (aseptic processing) and FDA 21 CFR Part 11–aligned electronic batch record systems via optional digital vacuum controller integration. All components are free of detectable endotoxins (<0.03 EU/mL) following standard autoclave validation.

Software & Data Management

While the SF30 operates as a standalone mechanical system, its design facilitates traceability integration: funnel graduation markings enable manual log entry into ELN platforms (e.g., LabArchives, Benchling); receiver bottle labeling zones accommodate barcode/RFID tags for inventory tracking; and the standardized 47 mm filter format ensures compatibility with automated membrane imaging systems (e.g., colony counters with AI-based CFU enumeration). For regulated environments, ROCKER provides material traceability dossiers—including mill test reports for SS316 components and USP VI certification for PC bottles—supporting audit readiness under GMP Annex 1 and ISO 17025 accreditation frameworks.

Applications

• Microbiological analysis: Sterile filtration of water, pharmaceutical buffers, and culture media prior to membrane filtration assays (ISO 9308-1, EPA Method 1603).
• Bioprocess clarification: Harvest-stage removal of mammalian cell debris using 0.45 µm or 0.22 µm membranes under controlled vacuum.
• Solvent-based purification: Filtration of HPLC mobile phases, organic extracts, and acid/base solutions where glass alternatives pose breakage or etching risks.
• Environmental testing: Field-deployable suspended solids (TSS) quantification per APHA 2540D using gravimetric analysis on pre-weighed filters.
• QC/QA laboratories: Routine validation of filter integrity (bubble point, diffusion tests) and sterility assurance in aseptic filling suites.

FAQ

Is the SF30 suitable for filtering aggressive solvents such as chloroform or acetone?
Yes—the SS316 stainless steel funnel exhibits excellent resistance to halogenated and polar aprotic solvents; however, prolonged exposure to undiluted acetone may affect polycarbonate bottle clarity over multiple cycles. For extended solvent contact, we recommend limiting exposure time and verifying bottle integrity via visual inspection pre-use.
Can the receiver bottle be used under vacuum without the funnel attached?
No—the overflow protection valve is actuated only when the funnel is fully engaged; operating the bottle alone under vacuum voids the safety function and risks pump damage.
What filter holders or accessories are compatible with the SF30 funnel?
The SF30 accepts all industry-standard 47 mm filter supports, including reusable stainless steel mesh bases and disposable polypropylene filter funnels—provided they maintain the same 47 mm seating diameter and gasket interface geometry.
Does ROCKER provide validation documentation for autoclaving cycles?
Yes—certified autoclave validation reports (including temperature mapping, cycle duration, and pressure profiles) are available upon request for both the PC bottle and SS316 funnel assemblies.
How often should the float-valve mechanism be inspected?
We recommend visual inspection before each use and functional verification (via slow-fill test to 1100 mL) at the start of each shift in high-frequency QC environments; no scheduled replacement is required under normal usage conditions.