Vacuubrand MD 4C Diaphragm Vacuum Pump (Refurbished)

The Vacuubrand MD 4C is a three-stage chemistry diaphragm pump engineered for applications requiring strong pumping speed and very deep vacuum—without the use of oil. Designed for continuous operation with corrosive gases and vapors, the pump features a fully chemically resistant flow path made from fluoroplastics and long-life PTFE sandwich diaphragms.

Its three-stage configuration allows the MD 4C to achieve an impressive ultimate vacuum of 1.5 mbar (3 mbar with gas ballast) while maintaining an excellent pumping speed of 3.4 m³/h. This makes it ideally suited for rotary and parallel evaporators, vacuum drying ovens, concentration systems, and any application with significant solvent vapor loads.

A gas ballast valve ensures reliable pumping of condensable vapors, even from high-boiling solvents. The maintenance-free drive, whisper-quiet operation, and extremely low vibration contribute to outstanding reliability in daily laboratory use.

Key Features

• Three-stage design for high throughput and deep vacuum
• Exceptional chemical resistance throughout wetted components
• High vapor tolerance; optimized for solvent-rich applications
• Very quiet, low-vibration operation
• Long-life PTFE diaphragms with robust service intervals
• Oil-free pumping (no contamination, no wastewater)
• Excellent performance even with gas ballast enabled

Technical Specifications

• Pumping speed (50 Hz): 3.4 m³/h
• Ultimate vacuum: 1.5 mbar
• Ultimate vacuum (gas ballast): 3 mbar
• Number of heads / stages: 4 / 3
• Motor power: 0.25 kW
• Connections: DN 8–10 mm hose nozzles
• Dimensions (L × W × H): 328 × 243 × 198 mm
• Weight: 14.3 kg
• Noise: 45 dBA
• ATEX: II 3G Ex h IIC T3 Gc X
• Power: 230 V, 50–60 Hz