ROCKER Chemker400 Corrosion-Resistant Diaphragm Vacuum Pump

Overview

The ROCKER Chemker400 is an oil-free, corrosion-resistant diaphragm vacuum pump engineered for reliable, maintenance-free operation in demanding laboratory environments where exposure to aggressive vapors and reactive gases is routine. Unlike rotary vane or piston-based systems, the Chemker400 employs a positive-displacement diaphragm mechanism—driven by a direct-coupled 90 W induction motor—to generate vacuum without lubricating oil. This eliminates oil carryover, vapor backstreaming, and associated contamination risks in sensitive downstream applications such as solvent purification, electrophoretic transfer, and solid-phase extraction. Its ultimate vacuum performance of 99 mbar (equivalent to −670 mmHg) and stable flow rate of 33 L/min at atmospheric inlet conditions make it suitable for medium-vacuum processes requiring consistent suction capacity over extended duty cycles. Designed and manufactured in Taiwan under strict quality control, the Chemker400 meets the mechanical robustness and chemical compatibility expectations of modern QC/QA labs operating under ISO/IEC 17025 or GLP-compliant workflows.

Key Features

• Chemically inert wetted path constructed entirely from PTFE (polytetrafluoroethylene), including diaphragms, valves, and gas-contact housing components—providing broad resistance to organic solvents, mineral acids (e.g., HCl, HNO₃), alkalis (e.g., NaOH), and halogenated compounds.
• Oil-free diaphragm operation ensures zero hydrocarbon emission, eliminating cross-contamination in analytical sample preparation and preserving integrity of mass spectrometry or HPLC mobile phase systems.
• Integrated thermal protection switch automatically interrupts power when internal motor temperature exceeds safe operational thresholds; system resumes normal function after passive cooling—no manual reset required.
• Direct-drive motor architecture with low-stroke diaphragm actuation minimizes mechanical vibration and acoustic emissions, achieving sound pressure levels ≤52 dB(A) at 1 m distance—compatible with quiet-zone laboratory installations.
• CE-marked per EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU, validating compliance with essential health, safety, and electromagnetic compatibility requirements for laboratory equipment.

Sample Compatibility & Compliance

The Chemker400 is validated for continuous use with corrosive process streams commonly encountered in preparative chemistry and environmental testing laboratories. Its PTFE-wetted construction supports compatibility with acetic acid, acetone, chloroform, ethanol, methanol, sulfuric acid (dilute), and sodium hypochlorite solutions—subject to concentration and temperature constraints defined in ROCKER’s Material Compatibility Guide. While not rated for explosive atmospheres (ATEX), the pump complies with IEC 61000-6-3 (EMC emission limits) and IEC 61000-6-2 (immunity standards), ensuring stable integration into automated vacuum manifolds and multi-channel filtration rigs. For regulated pharmaceutical or clinical labs, the absence of oil-based lubricants simplifies validation documentation and aligns with USP guidance on analytical instrument qualification.

Software & Data Management

As a standalone analog vacuum source, the Chemker400 does not incorporate digital controls, embedded firmware, or data logging capabilities. It operates via a front-panel toggle switch and requires no software installation, driver configuration, or network connectivity—reducing cybersecurity exposure and minimizing IT support dependencies. This simplicity supports 21 CFR Part 11 compliance in paper-based or hybrid electronic record environments where audit trails are maintained externally (e.g., via lab notebook entries or LIMS-generated run logs). Optional accessories—including vacuum gauges, pressure regulators, and cold traps—can be integrated without proprietary interfaces.

Applications

• Vacuum-assisted filtration of aggressive filtrates in gravimetric analysis or wastewater testing.
• Electrophoretic blotting (Western, Southern, Northern) where residual oil vapor could interfere with antibody binding or nucleic acid hybridization.
• Flash chromatography solvent degassing and eluent delivery under reduced pressure.
• Rotary evaporation auxiliary pumping for low-boiling-point solvents (e.g., dichloromethane, ethyl acetate).
• Gas sampling and purge-and-trap preconcentration systems handling acidic or oxidizing headspace vapors.

FAQ

Is the Chemker400 suitable for continuous 24/7 operation?
Yes—its thermally protected motor and PTFE-sealed diaphragm assembly are rated for uninterrupted duty cycles up to 8 hours per session, with recommended 30-minute cooldown intervals after prolonged high-load use.
Can it handle hydrogen chloride (HCl) gas directly?
The PTFE-wetted path provides excellent resistance to dry HCl vapor; however, condensation or aqueous-phase exposure may accelerate elastomer degradation—use inline scrubbers or chilled traps for humid or liquid-laden streams.
What maintenance is required?
None beyond periodic inspection of inlet tubing and filter elements; no oil changes, valve reseating, or diaphragm replacement is needed within the first 10,000 operating hours under typical lab conditions.
Does it meet FDA requirements for pharmaceutical manufacturing?
While not individually FDA-listed, its oil-free design, CE certification, and material traceability support qualification under GMP Annex 15 and ICH Q9 frameworks when incorporated into validated vacuum manifold systems.
Is a vacuum gauge included?
No—the Chemker400 is supplied as a pump-only unit; analog or digital vacuum gauges must be selected and installed separately based on required measurement range and accuracy class.