Rocker 300–LF 32 Oil-Free Vacuum Filtration System

Overview

The Rocker 300–LF 32 Oil-Free Vacuum Filtration System is an integrated, laboratory-grade vacuum filtration platform engineered for sterility-critical life science applications—including microbial assay preparation, solvent-resistant sample clarification, and aseptic membrane filtration. Unlike oil-lubricated vacuum systems, this unit employs a precision-machined, dry piston pump mechanism that eliminates hydrocarbon contamination risk and removes the need for routine oil replenishment or vapor scrubbing. The system operates on a fundamental principle of differential pressure-driven fluid separation: a regulated vacuum (typically –85 to –90 kPa at sea level) is applied across a microporous membrane seated in the SUS316 funnel, enabling rapid, particle-retentive filtration of aqueous and organic solutions while preserving sample integrity. Its design prioritizes compatibility with GLP- and GMP-aligned workflows—particularly where steam sterilization, flame-inert handling, or repeated autoclaving of components is required.

Key Features

• SUS316 stainless steel filter funnel conforming to ASTM F899 standards for corrosion resistance and biocompatibility; fully compatible with open-flame sterilization, ethylene oxide (EtO) gas, and saturated steam autoclaving (121°C, 15 psi, 30 min).
• Polyethersulfone (PES) receiver bottle set injection-molded to ISO 10993-5 cytotoxicity-compliant specifications; rated for continuous service up to 180°C and validated for repeated autoclave cycles without dimensional creep or hydrolytic degradation.
• Patented rotary bayonet coupling (ROCKER M381450) enables tool-free, leak-tight assembly between funnel and bottle in <3 seconds—eliminating clamp hardware, reducing operator variability, and minimizing cross-threading risk during high-throughput lab use.
• Integrated mechanical overflow protection activates at 95% bottle fill level, automatically isolating the vacuum line to prevent liquid ingress into the pump chamber—a critical safeguard for maintaining long-term pump reliability and avoiding downtime from condensate damage.
• Dual-stage inlet air filtration: a replaceable sintered polyethylene pre-filter (5 µm nominal retention) captures particulates and moisture prior to cylinder intake, extending piston seal life and ensuring consistent volumetric displacement over >10,000 operational hours.
• Modular waste extraction adapter allows real-time conversion of the PES receiver bottle into a dedicated waste collection vessel—enabling seamless transition between filtration and bulk liquid aspiration without component disassembly or secondary equipment.

Sample Compatibility & Compliance

The Rocker 300–LF 32 supports filtration of diverse biological and chemical matrices—including bacterial culture supernatants, cell lysates, protein solutions, ethanol/water mixtures, and low-polarity solvents (e.g., acetone, THF). Its SUS316/PES material pairing meets USP Class VI and ISO 10993-1 biocompatibility requirements for short-term contact with pharmaceutical intermediates. All wetted surfaces are non-leaching under standard pharmacopeial extractables testing protocols (USP ). The system complies with IEC 61000-6-3 (EMC emissions) and IEC 61000-6-2 (immunity), and its pump motor carries CE marking per Machinery Directive 2006/42/EC. Documentation packages include Factory Acceptance Test (FAT) reports and material traceability certificates for audit readiness under FDA 21 CFR Part 11 and EU Annex 11 environments.

Software & Data Management

This is a manually operated, analog vacuum filtration system with no embedded microcontroller or digital interface. All operational parameters—including vacuum level, flow rate, and filtration duration—are monitored externally using calibrated gauges and stopwatch-based timing protocols. As such, it requires no software validation, firmware updates, or electronic audit trails. Its design intentionally avoids digital dependency to ensure uninterrupted function in environments with electromagnetic interference (e.g., near centrifuges or RF sterilizers) and simplifies qualification under legacy GxP frameworks where paper-based SOPs remain standard. Maintenance logs, calibration records, and autoclave cycle documentation are maintained offline per institutional quality management system (QMS) requirements.

Applications

• Microbiological testing: Sterile filtration of nutrient broths, antibiotic solutions, and environmental swab eluates prior to membrane filtration assays (ASTM D5772, ISO 8573-7).
• Bioprocess clarification: Harvesting of mammalian or microbial cell cultures through 0.22 µm PVDF or PES membranes under controlled vacuum to minimize shear-induced protein denaturation.
• Pharmaceutical QC: Solvent-compatible clarification of active pharmaceutical ingredient (API) suspensions in non-aqueous media where oil contamination would compromise HPLC column integrity.
• Academic research: Rapid benchtop filtration of corrosive reagents (e.g., concentrated acids, halogenated solvents) where glass vacuum manifolds pose breakage or etching risks.
• Regulatory-compliant labs: Repeated autoclaving of entire filtration assemblies for ISO 13485-certified medical device manufacturing support processes.

FAQ

Can the LF 32 receiver bottle be sterilized in a steam autoclave?
Yes—the PES bottle is validated for 121°C, 15 psi, 30-minute autoclave cycles. Do not exceed 180°C continuous service temperature.
Is the Rocker 300 pump suitable for continuous operation?
It is rated for intermittent duty (duty cycle ≤ 60% per hour); extended continuous use may accelerate thermal fatigue of the piston seal assembly.
What filter membrane diameters are compatible with the LF 32 funnel?
Standard 47 mm diameter membranes only; the funnel geometry is not configurable for 25 mm or 90 mm formats.
Does the system include vacuum level regulation?
No—vacuum is fixed at maximum pump capability (~–90 kPa). For pressure-sensitive samples, external needle valves or vacuum controllers must be added upstream.
Are replacement inlet filters available as spare parts?
Yes—ROCKER part number 167300-FIL is supplied as a maintenance kit containing two sintered polyethylene pre-filters with O-rings.