Rocker 167103/167102/167130 Series Stainless Steel & Polypropylene Filter Funnel Caps

Overview

The Rocker 167103/167102/167130 Series Filter Funnel Caps are precision-engineered components designed for integration into vacuum-driven filtration systems used in life science laboratories, bioprocessing workflows, and quality control environments. These caps serve as the critical interface between filtration funnels and vacuum manifolds or pressure-controlled housings—ensuring leak-tight sealing, consistent flow dynamics, and mechanical stability during sterile or non-sterile filtration operations. Constructed either from high-purity ASTM A240 Grade 316 stainless steel (electropolished finish) or USP Class VI-compliant polypropylene (for magnetic variants), each cap is dimensionally calibrated to match Rocker’s standard funnel body series (e.g., 167100, 167110, 167120), guaranteeing repeatable gasket compression and uniform vacuum distribution across the filter membrane surface. Unlike generic adapters, these caps incorporate engineered vent geometry and pressure-relief features that mitigate bubble formation and membrane distortion during rapid filtrate drawdown—critical for preserving sample integrity in sensitive applications such as protein concentration, cell harvesting, and nucleic acid purification.

Key Features

• Two material platforms: Electropolished 316 stainless steel (167103/167102 series) for high-temperature autoclaving, chemical resistance, and long-term durability in GMP-grade cleanrooms; and medical-grade polypropylene (167130 series) with integrated neodymium magnets for hands-free lid retention on compatible stainless steel funnels.
• Geometric optimization: Flat-surface caps (167103-xx) provide vertical alignment for inline manifold stacking and automated liquid handling integration; angled-surface caps (167102-xx) enable gravity-assisted air displacement and reduced residual volume in viscous or foaming samples.
• Sealing architecture: Dual O-ring grooves (per ISO 3601-1:2023) accommodate Viton® or EPDM elastomers—validated for vacuum integrity up to –95 kPa at 25°C over 72-hour continuous operation.
• Traceability-ready design: Each cap bears laser-etched batch code and material grade identifier—supporting audit trails required under FDA 21 CFR Part 11 and EU Annex 11 for electronic record retention.
• Thermal and sterilization resilience: Fully compatible with steam autoclaving (121°C, 20 min, 15 psi), ethylene oxide gas sterilization (500 mg/L, 12 hr), and gamma irradiation (25 kGy)—with no measurable dimensional drift or surface oxidation post-cycle.

Sample Compatibility & Compliance

These caps are validated for use with standard 0.22 µm and 0.45 µm pore-size membranes—including mixed cellulose ester (MCE), polyethersulfone (PES), nylon, and PVDF—across aqueous, organic, and mildly acidic/basic solutions (pH 2–12). The 316 SS variant meets ASTM F899-22 for surgical-grade stainless steel performance, while the PP magnetic lid conforms to USP and cytotoxicity and systemic injection testing requirements. All units are manufactured under an ISO 13485:2016-certified quality management system, with full documentation available for GLP/GMP audits. No lubricants, adhesives, or secondary coatings are applied—ensuring extractables and leachables remain below ICH Q5C thresholds for biopharmaceutical process validation.

Software & Data Management

As passive mechanical components, the Rocker filter funnel caps do not incorporate embedded electronics or firmware. However, they are fully interoperable with digital vacuum controllers (e.g., Rocker VC-1000, Vacuubrand VACUU·SELECT) and LIMS-integrated lab automation platforms via standardized analog I/O triggers and pressure feedback loops. Batch-specific cap usage logs can be recorded within electronic lab notebooks (ELNs) compliant with 21 CFR Part 11, including timestamps, operator IDs, and sterilization cycle references—enabling full traceability from raw material receipt through final filtration step in regulated workflows.

Applications

• Sterile filtration of culture media, buffers, and reagents in upstream bioprocessing suites.
• Cell pellet recovery and washing in mammalian and microbial fermentation workflows.
• Clarification of clarified lysates prior to chromatographic purification steps.
• Environmental water testing per EPA Method 1603 (E. coli detection) and ISO 9308-1 (coliform enumeration).
• Pre-filtration conditioning for HPLC mobile phase preparation and UHPLC solvent degassing systems.
• Single-use and hybrid filtration setups where interchangeability between stainless steel and disposable funnel bodies is required.

FAQ

Are these caps compatible with non-Rocker filtration funnels?
Dimensional compatibility is verified only with Rocker-branded funnel bodies (models 167100–167120). Interchangeability with third-party systems is not guaranteed due to variance in flange diameter, thread pitch, and O-ring groove depth.

Can the magnetic PP caps be reused after autoclaving?
Yes—the 167130-32 magnetic lid retains full magnetic strength (>4,200 Gauss surface field) and structural integrity after ≥50 autoclave cycles; however, visual inspection for microcracks or discoloration is recommended before each use.

What is the maximum operating vacuum level for the stainless steel caps?
The electropolished 316 SS caps maintain mechanical integrity and seal performance under sustained vacuum down to –95 kPa (absolute), as validated per ISO 2859-1 sampling plans using helium leak testing (≤1 × 10⁻⁹ mbar·L/s).

Do you supply custom engraving or OEM branding?
Yes—custom laser marking (including logos, QR codes, or internal asset tags) is available under NDA; minimum order quantity applies. All markings comply with ISO 15223-1 for medical device labeling.