Vacuubrand ME 16C NT VARIO Variable-Speed Chemical Diaphragm Vacuum Pump

Overview

The Vacuubrand ME 16C NT VARIO is a high-performance, variable-speed chemical diaphragm vacuum pump engineered for precision-controlled vacuum applications in demanding laboratory environments—particularly rotary evaporation, solvent removal, freeze drying, and vacuum filtration. Unlike fixed-speed diaphragm pumps, the ME 16C NT VARIO employs an electronically commutated (EC) motor with continuous speed regulation from 30 to 2400 rpm, enabling real-time, proportional vacuum control without mechanical throttling or external valves. This architecture eliminates pressure lag and oscillation, delivering stable, stepless vacuum setpoints across its full operating range—from rough vacuum (70 mbar abs.) up to near-atmospheric conditions. Its eight-stage, single-head diaphragm design ensures high volumetric efficiency while maintaining exceptional chemical resistance via PTFE-coated pumping chambers, stainless-steel valve plates, and EPDM-free elastomers compliant with ISO 8573-1 Class 0 oil-free air standards. The pump operates without lubricating oil or hydrocarbon vapors, making it suitable for GMP-compliant pharmaceutical development, analytical sample preparation, and synthetic chemistry workflows where contamination risk must be minimized.

Key Features

• Variable-speed EC motor enables true closed-loop vacuum control—no manual adjustment or external controllers required for basic operation
• Integrated CVC 3000 vacuum controller with intuitive text-based menu, built-in vent valve, and auto-tuning algorithms for evaporation protocols
• Chemically inert wetted materials: PTFE diaphragms, FFKM (Kalrez®) seals, and Hastelloy C-276 valve components ensure compatibility with aggressive solvents (e.g., chlorinated hydrocarbons, strong acids, bases)
• Robust mechanical architecture with extended diaphragm service life (>15,000 operating hours under typical load), reducing total cost of ownership and scheduled maintenance intervals
• Low-noise operation (47 dBA at 50 Hz) and compact footprint (533 × 260 × 420 mm) optimized for benchtop integration in shared lab spaces
• ATEX-certified variant available for Zone 2/22 hazardous areas (II 3G IIC T3 X), validated for internal atmospheric use only

Sample Compatibility & Compliance

The ME 16C NT VARIO is designed for direct interfacing with chemically aggressive vapors and condensable loads common in organic synthesis and QC laboratories. Its dry-running, oil-free mechanism avoids cross-contamination between samples and eliminates solvent carryover into downstream instrumentation. When paired with optional accessories—including the AK inlet separator (KF DN 25) and EK exhaust condenser kit—the system achieves >95% solvent recovery efficiency, supporting compliance with ISO 14001 environmental management requirements and local VOC emission regulations. The pump meets IEC 61000-6-3 (EMC emissions) and IEC 61000-6-2 (immunity) standards. Its construction adheres to EU Machinery Directive 2006/42/EC and RoHS 2011/65/EU. For regulated environments, the CVC 3000 controller supports audit-trail-enabled operation when configured with optional USB data logging (not included), facilitating alignment with GLP and FDA 21 CFR Part 11 documentation expectations.

Software & Data Management

While the ME 16C NT VARIO operates autonomously via its embedded CVC 3000 controller, it supports optional PC-based monitoring and protocol archiving through Vacuubrand’s VACUU·VIEW software (Windows-compatible, USB connection). VACUU·VIEW enables real-time graphing of vacuum level vs. time, event-triggered data export (CSV), and user-defined alarm thresholds. All controller operations—including setpoint changes, vent cycles, and error logs—are timestamped and stored internally (non-volatile memory), providing traceability for method validation and process reproducibility. No calibration certificates are required for routine operation; however, periodic verification against a NIST-traceable reference manometer is recommended per ISO/IEC 17025 guidelines for accredited laboratories.

Applications

• Controlled-rate solvent evaporation in rotary evaporators (e.g., Büchi R-300, IKA RV 10)
• Vacuum-assisted crystallization and recrystallization of thermally sensitive APIs
• Lyophilization pre-freezing and primary drying support (as auxiliary roughing pump)
• High-boiling-point solvent removal (e.g., DMF, DMSO, NMP) without bumping or foaming
• Gas-phase reaction quenching and inert atmosphere purging in Schlenk line setups
• Environmental testing chambers requiring stable, low-maintenance vacuum sources

FAQ

Can the ME 16C NT VARIO be used with corrosive gases such as HCl or Cl₂?
Yes—when equipped with optional FFKM seals and PTFE-coated components, it is rated for intermittent exposure to halogenated and acidic vapors per Vacuubrand’s Chemical Resistance Guide (Revision 2023). Continuous exposure requires additional gas ballast or cold trap integration.
Is the CVC 3000 controller programmable for multi-step vacuum ramps?
Yes—the controller supports up to 5 sequential setpoints with defined ramp rates and dwell times, configurable via front-panel navigation or VACUU·VIEW.
What is the expected service interval for diaphragm replacement?
Under typical rotary evaporation duty (6–8 hrs/day, 20–50 mbar operating range), diaphragms last ≥12 months; lifespan extends significantly at lower speeds and reduced condensate load.
Does the pump require a dedicated exhaust ventilation system?
Not inherently—but when processing volatile organic compounds without an EK condenser, local fume hood exhaust or activated carbon scrubber is strongly advised per OSHA 1910.1200 and REACH Annex XVII requirements.
Can the ME 16C NT VARIO be integrated into a PLC-controlled automation platform?
Yes—via 0–10 V analog input/output and RS-485 Modbus RTU interface (optional module), enabling synchronization with reactor control systems and LIMS data acquisition pipelines.