VACUUBRAND MD 1 Three-Stage Diaphragm Vacuum Pump

Overview

The VACUUBRAND MD 1 is a compact, three-stage oil-free diaphragm vacuum pump engineered for reliable, contamination-free evacuation of non-corrosive gases in analytical, preparative, and quality control laboratory environments. Operating on the principle of positive displacement via precision-engineered PTFE- or FKM-coated diaphragms, the MD 1 achieves an ultimate absolute pressure of 1.5 mbar while maintaining high volumetric throughput—up to 1.4 m³/h at 60 Hz—even as the system approaches its vacuum limit. Its triple-stage architecture, combined with flat-profile diaphragms and optimized valve dynamics, delivers superior suction performance compared to conventional two-stage equivalents, particularly under low-pressure load conditions typical in rotary evaporation, filtration, degassing, and vacuum drying applications. Designed and manufactured in Germany, the pump adheres to stringent CE and RoHS directives, with select variants certified to ATEX Directive 2014/34/EU (Category II 3G, IIC T3 X) for use in potentially explosive atmospheres—restricted to internal atmospheric operation with 230 V supply.

Key Features

• Oil-free operation ensures zero hydrocarbon backstreaming—critical for solvent-sensitive processes and mass spectrometry sample preparation.
• Three-stage compression design sustains high pumping speed (>1.2 m³/h at 50 Hz) across a broad pressure range, minimizing process cycle times.
• PTFE- or FKM-diaphragms and FKM valves provide chemical resistance to common organic solvents and inert gases; wetted parts consist of aluminum housing and selected engineering plastics.
• Low-noise operation (40 dBA at 50 Hz) and minimal mechanical vibration enable integration into noise-sensitive labs and laminar flow hoods.
• Sealed, brushless induction motor with IP 42 ingress protection ensures long-term reliability and maintenance-free drive operation over extended service intervals.
• Integrated silencer and G1/8″ outlet port simplify exhaust routing; inlet accepts standard DN 6 mm hose barb connections without adapters.

Sample Compatibility & Compliance

The MD 1 is validated for continuous duty with dry, non-corrosive, non-condensable gases—including air, nitrogen, argon, and helium—and is compatible with vapors from low-volatility solvents (e.g., water, ethanol, acetone) when used with cold traps or condensers. It is not rated for halogenated, acidic, alkaline, or highly reactive gases (e.g., Cl₂, NH₃, H₂S). The pump complies with EN 61000-6-3 (EMC emission), EN 61000-6-2 (immunity), and ISO 8573-1:2010 Class 0 for particulate and oil-free air—supporting GLP and ISO/IEC 17025 traceability requirements where vacuum integrity must be documented. ATEX-certified units meet EU requirements for equipment intended for Zone 2/22 environments, though installation must follow manufacturer-specified mounting orientation and ventilation guidelines.

Software & Data Management

The MD 1 operates as a standalone analog device with no embedded firmware, digital interface, or data logging capability. This design eliminates software validation burdens and supports regulatory compliance in FDA 21 CFR Part 11–governed settings where electronic records are not required. All operational parameters—including voltage, frequency, ambient temperature (10–40 °C), and maximum backpressure (1.1 bar abs)—are fixed per nameplate specification. For audit readiness, users may record runtime hours manually or via external timer logs; service history tracking (e.g., diaphragm replacement cycles) aligns with VACUUBRAND’s recommended 12–24 month intervals under normal lab usage, supported by full traceability of consumables (e.g., diaphragm kits 696075, valve sets 696076).

Applications

• Rotary evaporation under controlled vacuum (0.5–100 mbar range) with consistent distillate recovery rates.
• Gravity and vacuum-assisted filtration of aqueous and organic suspensions in QC/QA testing workflows.
• Deaeration of resins, adhesives, and polymer precursors prior to casting or curing.
• Support vacuum for benchtop freeze dryers, vacuum ovens, and desiccators requiring stable sub-10 mbar operation.
• Gas sampling systems and purge-and-trap setups where hydrocarbon-free carrier gas is mandatory.

FAQ

Can the MD 1 handle solvent vapors directly without a cold trap?
No. While chemically resistant to brief exposure, prolonged intake of condensable vapors accelerates diaphragm fatigue and may cause premature valve adhesion. Always pair with an inline condenser or adsorption trap for volatile organic compounds.
Is the pump suitable for continuous 24/7 operation?
Yes—when operated within specified ambient (10–40 °C) and pressure limits, and with adequate ventilation. Thermal protection circuitry prevents overheating during extended duty cycles.
What maintenance is required beyond diaphragm replacement?
None. The motor requires no lubrication; valves and diaphragms constitute the sole scheduled wear items. No alignment, bearing servicing, or oil changes are necessary.
Does the MD 1 support analog or digital process control integration?
No. It lacks 0–10 V, 4–20 mA, or RS-485 interfaces. For automated vacuum regulation, integrate externally via a compatible vacuum controller (e.g., VACUUBRAND VACUU·SELECT) and solenoid valve.
How does the MD 1 compare to two-stage diaphragm pumps in terms of ultimate vacuum and speed?
Its three-stage configuration yields ~30% faster pumping below 10 mbar and achieves 1.5 mbar ultimate vacuum—typically 2–3× lower than comparable two-stage models—without sacrificing robustness or service life.