VACUUBRAND MD 1C +AK+EK Chemical Vacuum System

Overview

The VACUUBRAND MD 1C +AK+EK is a chemically resistant, oil-free diaphragm vacuum system engineered for demanding laboratory applications requiring reliable, low-maintenance vacuum generation in corrosive or solvent-laden environments. Unlike traditional rotary vane pumps, this four-stage, three-head diaphragm system operates without lubricating oil—eliminating contamination risks and enabling continuous operation under aggressive chemical vapors. Its design integrates two critical accessories: the AK inlet separator bottle (borosilicate glass with protective polymer sleeve) and the EK exhaust condenser. These components collectively ensure robust protection of the pump head against liquid carryover and particulate ingress while achieving near-quantitative solvent recovery—up to 98–99% under optimized condensation conditions. The system delivers an ultimate absolute pressure of 2 mbar at 50 Hz (1.5 mbar at 60 Hz), with stable performance maintained even during prolonged operation with high-boiling solvents such as DMF, DMSO, or ethylene glycol. It is routinely deployed as the primary vacuum source for rotary evaporators, vacuum ovens, freeze dryers, and vacuum filtration setups where chemical compatibility, quiet operation (<45 dBA), and low mechanical vibration are essential for process integrity and lab ergonomics.

Key Features

• Four-stage, three-head diaphragm architecture delivering enhanced vacuum depth and pumping stability across variable load conditions
• Chemically inert wetted parts—including PTFE-coated diaphragms, EPDM valves, and stainless-steel housing—ensuring long-term resistance to organic solvents, acids, and bases
• Integrated AK inlet separator: borosilicate glass vessel with shatter-resistant polymer coating, rated for vacuum service up to –0.9 bar; prevents droplet and particulate entry into the pump head
• Compact, high-efficiency EK exhaust condenser with dual cooling channels (DN 6–8 mm ports); achieves >95% condensation efficiency for common solvents (e.g., acetone, methanol, dichloromethane) at ambient cooling water temperatures (10–25 °C)
• Gas ballast valve enables controlled admission of dry air to purge condensable vapors, maintaining ultimate vacuum performance even during solvent-heavy duty cycles
• Low-noise, low-vibration operation (45 dBA at 50 Hz) due to balanced motor dynamics and elastomeric mounting—ideal for shared laboratory spaces and sensitive instrumentation environments
• ATEX-certified variant (II 3G IIC T3 X) available for use in potentially explosive atmospheres where internal equipment-generated hazards are present (230 V models only)

Sample Compatibility & Compliance

The MD 1C +AK+EK is validated for continuous use with a broad spectrum of volatile and semi-volatile compounds encountered in synthetic chemistry, pharmaceutical development, and materials science workflows. It complies with IEC 61000-6-3 (EMC emission standards) and IEC 61000-6-2 (immunity), and meets CE marking requirements under the EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU. For laboratories operating under GLP or GMP frameworks, the system supports traceable operation through optional analog vacuum gauge integration and is compatible with external data loggers for audit-ready pressure and runtime documentation. While not intrinsically compliant with FDA 21 CFR Part 11 out-of-the-box, its operational parameters can be recorded via third-party validated SCADA or LIMS interfaces when paired with calibrated transducers.

Software & Data Management

This vacuum system operates as a standalone analog device with no embedded firmware or digital control interface. All operational parameters—including inlet pressure, flow rate, and temperature—are monitored externally using compatible vacuum gauges (e.g., Pirani or capacitance manometers) and flow meters. Users may integrate the MD 1C +AK+EK into centralized lab automation platforms via 0–10 V or 4–20 mA analog signal outputs (available on optional monitoring modules). For regulatory compliance scenarios requiring electronic records, vacuum status and runtime data must be captured using validated external acquisition hardware and software meeting ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).

Applications

• Rotary evaporation of heat-sensitive compounds and high-boiling-point solvents (e.g., polyethylene glycols, silanes, ionic liquids)
• Vacuum drying of hygroscopic or oxidation-prone samples in benchtop ovens and desiccators
• Short-path distillation and Kugelrohr apparatus support under moderate vacuum (5–50 mbar range)
• Gas-phase reaction setup evacuation and inert gas purging sequences
• Membrane filtration under vacuum with solvent-resistant filter housings
• Pre-concentration of aqueous extracts prior to LC-MS analysis, minimizing thermal degradation

FAQ

Can the MD 1C +AK+EK replace a rotary vane pump in all applications?
It is suitable for most medium-vacuum applications (down to ~2 mbar), but not for high-vacuum processes requiring <0.01 mbar (e.g., electron microscopy, high-vacuum distillation).
Is the AK separator bottle autoclavable?
No—the polymer protective sleeve is not autoclave-rated; cleaning is recommended with compatible solvents followed by nitrogen purge.
What maintenance intervals are recommended?
Diaphragms and valves should be inspected every 6,000 operating hours or annually, whichever occurs first; replacement kits are available under part number 696621-SP.
Does the EK condenser require chilled coolant?
Ambient tap water (10–25 °C) is sufficient for most solvents; recirculating chillers are recommended only for low-volatility compounds (e.g., NMP, sulfolane) or high-throughput evaporation.
Is remote start/stop functionality supported?
Not natively—but external relay control via the motor’s power input terminals is possible with appropriate safety interlocks and isolation relays.