VACUUBRAND MV 2 NT VARIO Four-Stage Diaphragm Vacuum Pump
| Brand | VACUUBRAND® |
|---|---|
| Origin | Germany |
| Model | MV 2 NT VARIO |
| Ultimate Vacuum (abs.) | 0.3 mbar |
| Max. Pumping Speed | 3.3 m³/h |
| Motor Speed Range | 30–2400 rpm |
| Inlet Port | KF DN 16 |
| Outlet Port | Muffler / G1/4" |
| Power Supply | 230 V~, 50–60 Hz |
| Noise Level | 45 dBA (50 Hz, typical) |
| IP Rating | IP20 |
| Weight | 18.9 kg |
| Dimensions (L×W×H) | 325 × 235 × 245 mm |
Overview
The VACUUBRAND MV 2 NT VARIO is a four-stage, oil-free diaphragm vacuum pump engineered for stable, continuous evacuation of non-corrosive gases and vapors down to an ultimate absolute pressure of 0.3 mbar. Designed and manufactured in Germany, it operates on the principle of positive displacement via elastomeric diaphragms driven by an eccentric crankshaft—eliminating lubricants from the gas path and ensuring contamination-free operation essential for analytical instrumentation, vacuum drying, filtration, degassing, and rotary evaporation. Its multi-stage architecture enables high compression ratios while maintaining robust performance near ultimate vacuum, distinguishing it from single- or dual-stage alternatives. The integrated VARIO® speed control system dynamically adjusts motor rotation (30–2400 rpm) in response to real-time vacuum demand, enabling precise process regulation without manual valve intervention.
Key Features
- Four-stage diaphragm design delivering high volumetric efficiency and superior ultimate vacuum (0.3 mbar abs.)
- VARIO® variable-speed drive with closed-loop feedback control—automatically optimizes pumping speed to match system load and target pressure
- FKM (fluoroelastomer) double-layer diaphragms reinforced with fabric mesh for extended service life and resistance to fatigue under cyclic stress
- Low-vibration, low-noise operation (45 dBA at 50 Hz) enabled by precision-balanced mechanics and acoustic damping in the housing and muffler assembly
- All wetted parts constructed from aluminum, stainless steel (AISI 304), and chemically resistant polymers—compatible with water vapor, solvents, and inert gases
- Integrated CVC 3000 vacuum controller with intuitive menu navigation, analog/digital I/O, and programmable setpoints for automated vacuum sequencing
- TURBO·MODE™ functionality allows the pump to operate at elevated speeds during roughing phases—enhancing throughput when used as a forepump for turbomolecular systems
Sample Compatibility & Compliance
The MV 2 NT VARIO is certified for use with non-corrosive, non-condensable, and non-explosive gases only. It complies with IEC 61000-6-3 (EMC emission standards) and carries ATEX certification (II 3G IIC T3 X) for safe operation in potentially explosive atmospheres—restricted to 230 V models installed in Zone 2/22 environments. While not rated for direct handling of aggressive halogenated or acidic vapors (e.g., HCl, Cl₂, HF), optional accessories—including stainless-steel KF tubing (DN 16) and venting valves (VBM-B)—support integration into GLP- and GMP-aligned vacuum manifolds. The pump meets ISO 8573-1 Class 0 air purity requirements for oil-free operation and is suitable for applications requiring adherence to USP , ASTM E2654, and ISO/IEC 17025 documentation protocols.
Software & Data Management
The CVC 3000 vacuum controller provides local and remote monitoring via RS-232 or analog 0–10 V output. It supports up to three user-defined vacuum setpoints with ramp rate control, time-based hold functions, and automatic shut-off logic. Audit-trail-capable logging (via optional PC interface) records timestamped pressure values, motor speed, runtime hours, and fault events—enabling compliance with FDA 21 CFR Part 11 when paired with validated data acquisition software. Firmware updates are performed via USB, and configuration parameters can be exported/imported as encrypted binary files for instrument requalification after maintenance.
Applications
- Roughing and backing for turbomolecular and diffusion pumps in high-vacuum systems
- Vacuum-assisted sample preparation: freeze-drying, solvent removal, and inert-gas purging
- Gas sampling and calibration of residual gas analyzers (RGAs) and mass spectrometers
- Controlled-atmosphere glove boxes requiring stable low-pressure inert gas circulation
- Thin-film deposition processes where hydrocarbon-free vacuum integrity is critical
- Quality control labs performing ASTM D2873 (vacuum distillation of petroleum products) or ISO 21620 (vacuum packaging validation)
FAQ
Can the MV 2 NT VARIO handle condensable vapors such as ethanol or acetone?
Yes—within defined limits. The pump tolerates moderate concentrations of organic vapors; however, prolonged exposure to high partial pressures may accelerate diaphragm aging. Use of a cold trap or condenser upstream is recommended for continuous vapor loads.
Is the CVC 3000 controller required to use VARIO® functionality?
Yes. The VARIO® speed modulation is only active when the CVC 3000 controller is connected and configured. Standalone operation defaults to fixed-speed mode at nominal 2400 rpm.
What maintenance intervals are recommended for routine operation?
Diaphragm replacement is typically required every 10,000–15,000 operating hours under standard conditions. Valve plates and sealing gaskets should be inspected annually. Full service kits and OEM replacement parts are available with traceable lot documentation.
Does the pump support analog pressure feedback for PLC integration?
Yes—the CVC 3000 provides a 0–10 V analog output proportional to measured vacuum, compatible with most industrial PLCs and SCADA systems without additional signal conditioning.
How does TURBO·MODE™ improve system performance?
TURBO·MODE™ temporarily overrides standard speed limits to maximize pumping speed during initial evacuation or recovery from pressure spikes—reducing cycle times by up to 40% compared to fixed-speed operation, particularly in large-volume chambers.
