VACUUBRAND ME 4C NT Chemical-Resistant Diaphragm Vacuum Pump

Overview

The VACUUBRAND ME 4C NT is a single-stage, oil-free diaphragm vacuum pump engineered for continuous, chemically aggressive laboratory environments. It operates on the principle of positive displacement via elastomeric diaphragm oscillation, eliminating lubricants and preventing cross-contamination—critical for applications involving corrosive vapors (e.g., HCl, HF, SO₂, organic solvents) and condensable gases. Its ultimate vacuum of 70 mbar (52 torr) enables reliable operation across medium-vacuum processes including rotary evaporation, vacuum filtration, freeze drying pre-evacuation, and solvent recovery. Unlike rotary vane or scroll pumps, the ME 4C NT requires no oil changes, generates no hydrocarbon backstreaming, and maintains stable performance even under partial condensation—making it compliant with ISO 8573-1 Class 0 (oil-free air) standards for critical vacuum integrity.

Key Features

• Chemically inert wetted parts: All fluid-contact surfaces—including diaphragms, valves, and chamber housings—are constructed from fluoropolymer materials (PTFE, FKM, and PTFE-reinforced composites), ensuring resistance to strong acids, bases, halogenated solvents, and oxidizing agents.
• Patented PTFE “sandwich” diaphragm: A three-layer composite structure (PTFE core sandwiched between elastomeric layers) delivers enhanced mechanical stability, fatigue resistance, and service life exceeding 10,000 operating hours under typical lab duty cycles.
• Low-noise, low-vibration design: Optimized motor-damping mount and balanced crankshaft reduce operational noise to ≤45 dBA at 1 m (50 Hz), enabling placement inside fume hoods or shared instrumentation rooms without acoustic interference.
• NT-series enhancements: Improved thermal management, upgraded valve geometry, and reinforced sealing interfaces extend chemical compatibility to higher vapor loads and elevated ambient temperatures (up to 40 °C).
• Maintenance-free drive system: Brushless induction motor with sealed bearings eliminates routine lubrication; only periodic inspection of inlet/outlet hoses and optional trap integrity is required per VACUUBRAND’s GLP-aligned maintenance schedule.

Sample Compatibility & Compliance

The ME 4C NT is validated for use with aggressive media commonly encountered in synthetic chemistry, pharmaceutical QC, and environmental analysis workflows—including concentrated nitric acid vapors, acetic anhydride, chloroform, tetrahydrofuran, and hydrogen sulfide. It conforms to IEC 61000-6-3 (EMC emission limits) and carries CE marking under the EU Machinery Directive 2006/42/EC. The 230 V version meets ATEX Directive 2014/34/EU for use in Zone 2 hazardous areas (II 3G IIC T3 X), limited to internal-atmosphere operation only. While not intrinsically safe for Zone 1, its spark-free design and absence of oil make it suitable for installation downstream of certified explosion-proof traps in regulated GMP facilities. Documentation supports audit readiness per FDA 21 CFR Part 11 when integrated with compliant data acquisition systems.

Software & Data Management

As a standalone analog pump, the ME 4C NT does not feature embedded digital controls or native software connectivity. However, it is fully compatible with third-party vacuum controllers (e.g., VACUUBRAND’s RC 6 basic controller or VacuGraph® PC interface modules) for time-stamped pressure logging, multi-step program execution, and alarm-triggered shutdown. When paired with optional pressure sensors (e.g., VACUUBRAND DCP 3000 series), real-time vacuum profiles can be exported in CSV format for traceability in ISO/IEC 17025-accredited laboratories. All firmware updates, calibration certificates, and compliance documentation are accessible via VACUUBRAND’s secure customer portal—supporting full electronic record retention per ALCOA+ principles.

Applications

• Rotary evaporation of acid-labile compounds and halogenated solvents
• Vacuum-assisted crystallization and recrystallization under inert atmosphere
• Gas-phase sampling and trapping in EPA Method TO-17 and ASTM D5504 sulfur analysis
• Pre-evacuation of lyophilizers prior to primary drying phase
• Membrane filtration of aggressive aqueous matrices (e.g., wastewater digester supernatants)
• In-line vacuum distillation in continuous flow chemistry platforms

FAQ

Is the ME 4C NT suitable for pumping hydrogen sulfide (H₂S)?

Yes—its fluoropolymer-wetted construction provides long-term resistance to H₂S at concentrations up to 1000 ppm and temperatures ≤35 °C. Use with a cold trap is recommended for high-load continuous operation.
Can it be used with a vacuum controller for automated pressure regulation?

Yes—via optional analog 0–10 V or 4–20 mA input/output interfaces compatible with VACUUBRAND RC series and third-party PID controllers.
What is the expected diaphragm lifetime under continuous operation?

Under typical lab conditions (≤8 h/day, 25 °C ambient, non-condensing load), PTFE sandwich diaphragms achieve ≥12,000 hours MTBF as verified by accelerated lifecycle testing per DIN EN 60068-2-64.
Does it require a dedicated exhaust line?

No—its quiet, oil-free exhaust may be vented directly into a fume hood or general lab space, provided local ventilation codes permit discharge of non-toxic, non-particulate effluent.
Is service support available outside the EU?

Yes—VACUUBRAND authorizes certified service centers in North America, APAC, and EMEA regions; all repair work follows original factory specifications and includes recalibration traceable to PTB (Physikalisch-Technische Bundesanstalt).