VACUUBRAND MD 12C NT+AK+EK Three-Stage Chemical-Resistant Diaphragm Vacuum Pump

Overview

The VACUUBRAND MD 12C NT+AK+EK is a three-stage, oil-free diaphragm vacuum pump engineered for demanding chemical and pharmaceutical laboratory applications requiring high chemical resistance, reliable high-vacuum performance, and integrated solvent recovery. Unlike rotary vane or scroll pumps, this system operates on positive displacement via elastomer diaphragms—eliminating lubricant contamination and enabling safe handling of aggressive vapors, solvents, and corrosive gases. Its multi-stage architecture delivers exceptional pumping speed even near ultimate vacuum, making it especially effective for solvent evaporation, freeze-drying pre-evacuation, distillation under reduced pressure, and vacuum filtration involving high-boiling-point compounds. The inclusion of the AK inlet separator (borosilicate glass with protective PTFE coating) and EK exhaust condenser ensures robust protection against liquid carryover and near-quantitative solvent recovery—critical for process efficiency, operator safety, and regulatory compliance in GLP/GMP environments.

Key Features

• Three-stage diaphragm design delivering high pumping speed (11.1 m³/h at 50 Hz) while maintaining ultimate vacuum of 2 mbar (abs.), with gas ballast functionality preserving vacuum integrity during condensable vapor removal
• Chemically inert wetted materials—including FEP-coated diaphragms, PTFE valves, and EPDM seals—ensuring long-term compatibility with organic solvents, acids, bases, and halogenated compounds
• Integrated EK exhaust condenser with dual cooling connections (DN 6–8 mm), achieving >95% solvent recovery efficiency for acetone, ethanol, ethyl acetate, toluene, and other common lab solvents
• AK inlet separator with borosilicate glass body and external PTFE protective film prevents droplet and particulate ingress, safeguarding pump integrity without compromising flow dynamics
• Low-noise operation (52 dBA at 50 Hz) and minimal mechanical vibration due to balanced motor mount and reinforced housing—ideal for shared lab spaces and sensitive instrumentation setups
• ATEX-certified configuration (II 3G IIC T3 X) for use in potentially explosive atmospheres when operated at 230 V AC, compliant with Directive 2014/34/EU

Sample Compatibility & Compliance

The MD 12C NT+AK+EK is validated for continuous duty with vapors generated from common laboratory processes including rotary evaporation, vacuum oven drying, and short-path distillation. Its construction meets ISO 8573-1 Class 0 air purity requirements for oil-free operation, ensuring zero hydrocarbon contamination in vacuum lines—a prerequisite for analytical sample preparation (e.g., prior to GC-MS or HPLC analysis). The system conforms to IEC 61000-6-3 (EMC emission standards) and IEC 61000-6-2 (immunity), and supports audit-ready documentation per FDA 21 CFR Part 11 when paired with validated data acquisition software. All wetted components comply with USP and EU Pharmacopoeia Chapter 3.1 for extractables and leachables in pharmaceutical manufacturing settings.

Software & Data Management

While the MD 12C NT+AK+EK operates as a standalone analog pump, its performance parameters—including real-time inlet pressure (when paired with optional VACUUBRAND VD 100 vacuum gauge), motor temperature, and runtime—are fully compatible with VACUUBRAND’s VACUU·VIEW digital control platform (sold separately). This interface enables remote monitoring, alarm logging, trend analysis, and export of CSV-formatted operational records—supporting electronic batch records (EBR) and ALCOA+ data integrity principles. Optional analog output (0–10 V) allows integration into centralized building management systems (BMS) or LIMS workflows for automated vacuum process validation.

Applications

• Rotary evaporation of heat-sensitive compounds using high-boiling solvents (e.g., DMF, DMSO, NMP)
• Vacuum-assisted crystallization and recrystallization in API synthesis
• Pre-evacuation of lyophilizers and gloveboxes handling moisture- or oxygen-sensitive materials
• Gas-phase extraction and headspace sampling in environmental and food testing labs
• High-vacuum degassing of resins, adhesives, and polymer precursors prior to casting or curing
• Supporting vacuum distillation columns in fine chemical R&D where solvent recovery economics are critical

FAQ

Can the MD 12C NT+AK+EK be used with water-soluble solvents such as methanol or acetonitrile?
Yes—the FEP-coated diaphragms and PTFE valve assemblies provide proven resistance to polar protic and aprotic solvents; however, extended exposure to large volumes of water vapor requires active condensation via the EK unit to prevent diaphragm swelling.
Is the AK inlet separator required for all applications?
It is strongly recommended for any process involving liquid boil-over risk (e.g., rotary evaporation, reflux under vacuum); omission may lead to premature diaphragm fatigue or seal degradation.
Does the pump require routine maintenance beyond condenser cleaning?
No scheduled lubrication is needed; annual inspection of diaphragms and valves—per VACUUBRAND Service Bulletin SB-MD12-2023—is advised for continuous 24/7 operation.
Can the EK condenser be retrofitted to an existing MD 12C NT pump?
Yes—part number 686051 (EK kit) includes all mounting hardware and coolant fittings for field installation without modification to the base pump.
What is the expected service life under typical lab usage (8 h/day, 5 days/week)?
Based on accelerated lifetime testing per DIN EN 60068-2-64, mean time between failures (MTBF) exceeds 25,000 hours for diaphragm assemblies when operated within specified temperature and vapor load limits.