ROCKER Lafil300C PTFE-Coated Corrosion-Resistant Diaphragm Vacuum Pump

Overview

The ROCKER Lafil300C is a compact, oil-free diaphragm vacuum pump engineered for reliable and chemically inert operation in demanding laboratory environments. Utilizing a positive-displacement diaphragm mechanism, it generates vacuum without lubricating oil—eliminating oil carryover, vapor contamination, and routine maintenance associated with rotary vane pumps. Its core architecture features PTFE-coated wetted parts—including the diaphragm, pump chamber, and valve plates—combined with 316 stainless steel gas valves, delivering exceptional resistance to aggressive solvents, acids, and bases commonly encountered in analytical sample preparation, HPLC mobile phase degassing, and aqueous filtration workflows. Designed for continuous duty under standard laboratory conditions (220 V / 50 Hz), the Lafil300C achieves an ultimate vacuum of 99 mbar and a maximum flow rate of 23 L/min at atmospheric inlet pressure, making it suitable for medium-throughput vacuum applications where chemical compatibility and operational simplicity are critical.

Key Features

• PTFE-coated diaphragm and internal chamber for broad chemical resistance—validated against common organic solvents (e.g., acetone, methanol, acetonitrile), dilute mineral acids, and alkaline solutions
• Oil-free operation ensures zero hydrocarbon contamination—essential for HPLC solvent degassing, GC sample prep, and cleanroom-adjacent workflows
• Integrated thermal overload protection automatically interrupts motor operation when internal temperature exceeds safe thresholds; system self-resets upon cooling
• Built-in vacuum regulation enables precise control of suction pressure without external valves or controllers
• Pre-installed inlet particulate filter minimizes ingress of dust and particulates, extending diaphragm service life and maintaining consistent performance
• CE-marked, RoHS-compliant, and rated IP30 for protection against solid objects ≥2.5 mm—meets baseline electrical safety and environmental compliance requirements for EU-based laboratories
• Low-noise operation at 50 dB(A) supports use in shared lab spaces without acoustic disruption

Sample Compatibility & Compliance

The Lafil300C is compatible with vacuum-driven processes involving aqueous, polar, and moderately aggressive organic media. Its PTFE/316SS wetted path meets material compatibility expectations outlined in ASTM D471 (rubber property testing) and ISO 10993-5 (biological evaluation of medical device materials), though formal biocompatibility certification is not claimed. The pump does not require GLP/GMP validation out-of-the-box but supports audit-ready documentation through traceable serial-number registration and CE conformity declaration. It complies with IEC 61000-6-3 (EMC emission limits) and IEC 61000-6-2 (immunity standards), ensuring stable function in electromagnetically noisy lab environments. Note: For applications involving highly corrosive gases (e.g., chlorine, hydrogen fluoride) or explosive vapors, consult ROCKER’s chemical compatibility chart and implement appropriate secondary containment or scrubbing systems.

Software & Data Management

The Lafil300C operates as a standalone analog device with no embedded microprocessor, firmware, or digital interface. As such, it does not support data logging, remote monitoring, or FDA 21 CFR Part 11–compliant electronic records. However, its mechanical simplicity ensures long-term reliability, minimal calibration drift, and straightforward integration into validated vacuum manifolds. Users may pair it with external pressure transducers (e.g., capacitance manometers) and data acquisition systems for process documentation where required by internal SOPs or quality systems. ROCKER provides full technical documentation—including dimensional drawings, electrical schematics, and CE Declaration of Conformity—for inclusion in equipment qualification protocols (IQ/OQ).

Applications

• Vacuum filtration of water, biological buffers, and cell culture supernatants using membrane filters (0.22 µm–1.2 µm)
• Preparation and degassing of HPLC mobile phases to prevent bubble formation in high-pressure fluidic paths
• Concentration and solvent removal in rotary evaporation auxiliary setups (low-vacuum stage)
• Gas sampling and passive air monitoring via sorbent tube evacuation
• Evacuation of desiccators and glove boxes requiring non-oil vacuum sources
• Supporting lyophilizer pre-freeze stages where oil-free vacuum integrity is mandated

FAQ

Is the Lafil300C suitable for continuous 24/7 operation?
Yes—its brushless motor design, thermal cutoff, and robust diaphragm actuation mechanism support uninterrupted duty cycles under nominal load conditions. Ambient temperature should remain below 35°C, and adequate ventilation must be maintained.
Can it handle chlorinated solvents like dichloromethane or chloroform?
PTFE exhibits excellent resistance to these solvents; however, prolonged exposure may affect elastomeric seals over time. ROCKER recommends consulting the full chemical compatibility guide before extended use.
Does the pump include an exhaust filter?
No—exhaust is vented directly to ambient air. For volatile or hazardous vapors, connect the exhaust line to a fume hood or activated carbon scrubber.
What maintenance is required?
None beyond periodic inspection of the inlet filter and replacement every 6–12 months depending on particulate load. Diaphragms typically last 10,000+ operating hours under normal conditions.
Is a buffer flask necessary?
While not included, ROCKER strongly recommends installing a borosilicate glass buffer flask between the pump and process vessel to prevent liquid backflow and protect the diaphragm from condensate or aerosol ingress.