VACUUBRAND MD 4C EX+AK+EK ATEX-Certified Explosion-Proof Chemical Diaphragm Vacuum Pump

Overview

The VACUUBRAND MD 4C EX+AK+EK is a fully certified, explosion-proof chemical diaphragm vacuum pump engineered for safe and reliable operation in potentially explosive atmospheres (ATEX Zone 1 and Zone 2). Designed in accordance with Directive 2014/34/EU, it integrates dual-layer protection: intrinsic safety within the gas-handling chamber (II 2G IIC T3 X) and robust motor enclosure rated to II 2G Ex d IIB T4. Unlike oil-lubricated systems, this pump operates completely oil-free—eliminating vapor backstreaming, hydrocarbon contamination, and maintenance-intensive oil changes. Its four-stage, three-stage compression architecture delivers stable vacuum performance down to 3 mbar (absolute) while maintaining high chemical resistance across aggressive vapors generated during rotary evaporation, vacuum drying, solvent recovery, or distillation under reduced pressure. The pump’s construction prioritizes process integrity: all wetted parts—including diaphragms, valves, and chamber liners—are fabricated from PTFE, FKM, and EPDM elastomers, ensuring compatibility with halogenated solvents, acids, bases, and organic vapors up to 40 °C. Integrated inert gas purging capability (via dedicated AK gas ballast port) enables continuous dilution of flammable mixtures inside the pump head, satisfying stringent risk mitigation requirements for Class I, Division 1 environments per NFPA 496 and IEC 60079-15.

Key Features

• ATEX-certified dual-zone protection: pump chamber (II 2G IIC T3 X), motor (II 2G Ex d IIB T4), and ambient environment (II 2G/3G IIB T4 X)
• Four-pump-head, three-stage compression design for enhanced ultimate vacuum and vapor handling capacity
• Antistatic housing and conductive wetted components compliant with EN 60079-32-1 for static charge dissipation
• Integrated thermal and current overload protection with self-resetting lockout logic
• Dual cooling ports (DN 6–8 mm) supporting optional external air or water-assisted thermal management
• Gas ballast valve (AK module) enabling continuous inert gas (N₂ or Ar) purge to suppress explosive limits in intake stream
• Overpressure relief valve on exhaust side meeting PED 2014/68/EU requirements
• IP54-rated enclosure for dust and splash resistance in laboratory and pilot-plant settings

Sample Compatibility & Compliance

The MD 4C EX+AK+EK is validated for continuous duty with vapors from common laboratory solvents including acetone, dichloromethane, ethyl acetate, methanol, toluene, and THF—as well as corrosive gases such as HCl, SO₂, and Cl₂ at concentrations below material threshold limits. All elastomeric seals conform to FDA 21 CFR §177.2600 for incidental food contact where applicable. The pump meets ISO 8573-1:2010 Class 0 for oil-free air quality and complies with EU RoHS 2011/65/EU and REACH (EC) No. 1907/2006. Documentation includes full EC Declaration of Conformity, ATEX certificate (TÜV 09 ATEX 1173 X), and traceable material certifications for all wetted surfaces. It supports GLP-compliant workflows through mechanical stability and reproducible vacuum profiles—critical for method validation under ISO/IEC 17025 and USP .

Software & Data Management

This is a standalone, analog-controlled pump with no embedded firmware or digital interface. Operation relies on direct 230 V~ / 50 Hz mains connection and manual actuation via external vacuum controller or process valve. While it lacks USB/RS-485 connectivity, its electrical signature (rated current: 2 A; inrush: 10.2 A/125 ms) is compatible with programmable logic controllers (PLCs) and SCADA systems when integrated via auxiliary contactors and current-sensing relays. All operational parameters—including thermal shutdown events and overcurrent trips—are mechanically logged via internal bimetallic and magnetic trip mechanisms, supporting audit-ready maintenance records per GMP Annex 15 and FDA 21 CFR Part 11 when paired with calibrated external monitoring hardware.

Applications

• Solvent removal under vacuum in ATEX-classified rotary evaporators (e.g., Büchi R-300, IKA RV 10)
• Vacuum drying of thermally sensitive APIs and catalysts in explosion-proof ovens (e.g., Memmert VO series)
• Distillation and fractional crystallization in hazardous area pilot reactors
• Evacuation of gloveboxes and inert-atmosphere synthesis stations requiring Class I, Div 1 compliance
• Sample preparation for GC-MS and LC-MS where hydrocarbon-free vacuum is mandatory
• Chemical fume hood exhaust augmentation in laboratories handling pyrophoric reagents

FAQ

Is the MD 4C EX+AK+EK suitable for continuous duty with chlorinated solvents?

Yes—its PTFE/FKM diaphragms and EPDM valves are rated for prolonged exposure to dichloromethane, chloroform, and carbon tetrachloride at ≤40 °C and ≤3 mbar operating vacuum.
Does the pump require external cooling to maintain rated performance?

Not under standard lab conditions (20–25 °C ambient); however, active cooling via the DN 6–8 mm ports is recommended when ambient exceeds 35 °C or when processing high-heat-of-vaporization solvents continuously.
Can the gas ballast (AK) and membrane rupture detection (EK) modules be retrofitted?

No—AK and EK are factory-integrated options; only the EX base configuration supports field upgrades, and those must be performed by VACUUBRAND-authorized service centers to preserve ATEX certification.
What maintenance intervals are recommended for GLP-compliant operation?

Diaphragm replacement every 6,000 operating hours or 12 months (whichever occurs first); valve set inspection every 3,000 hours; full calibration verification annually using traceable vacuum gauge standards per ISO 2533.
Is the pump compatible with vacuum controllers that modulate speed?

No—it operates at fixed 1500 rpm via line-frequency synchronous motor; variable-speed control requires external frequency inverters rated for Ex d IIB T4 environments, which are not supplied by VACUUBRAND.