MD 4C VARIO select, CH

MD 4C VARIO select is a three-stage VARIO chemistry diaphragm pump for laboratory vacuum applications. It operates at 200-230 V / 50-60 Hz and is equipped with a CH power cable. The unit is supplied as 1 pc and has a net weight of 17.4 kg with a gross weight of 24.1 kg. This model from manufacturer VACUUBRAND originates in Germany and belongs to the VARIO select series of chemistry membrane pumps. Its three-stage design supports vacuum generation for chemical laboratory workflows that involve solvents and process vapours. The VARIO select concept enables adaptable vacuum control for routine tasks such as evaporation, filtration and drying under reduced pressure. As a chemistry diaphragm pump, the MD 4C VARIO select provides the chemical resistance expected of this pump class while remaining suitable for typical laboratory installation. The CH mains cable ensures direct compatibility with corresponding power outlets, allowing straightforward commissioning in facilities standardised on that connector type.

This article is part of Vacuum pumps, in Pumps, vacuum & evaporation.

Key features

• Pack size: 1 piece
• Pump type: VARIO chemistry diaphragm pump
• Stages: Three-stage
• Operating voltage: 200-230 V / 50-60 Hz
• Power cable: CH
• Manufacturer: VACUUBRAND
• Net weight: 17.4 kg
• UNSPSC: 41104900
• Voltage: 200-230 V, 50-60 Hz
• Max. pumping speed 50 Hz: 4.6 m³/h
• Max. pumping speed 60 Hz: 2.7 cfm
• Ultimate vacuum: 1.5 mbar / 1.1 torr
• Ultimate vacuum with gas ballast: 3 mbar / 2.2 torr
• Number of heads: 4
• Number of stages: 3
• Vacuum controller: VACUU·SELECT
• Lower ambient temperature (operation): 10 °C
• Upper ambient temperature (operation): 40 °C
• Lower ambient temperature (storage): -10 °C
• Upper ambient temperature (storage): 60 °C
• Max. back pressure (abs.): 1.1 bar
• Inlet connection: Hose nozzle DN 8-10 mm
• Outlet connection: Hose nozzle DN 8-10 mm
• Rated motor power: 0.53 kW
• Protection class IEC 60529: IP 20
• Dimension L in mm: 325 mm
• Dimension B in mm: 243 mm
• Dimension H in mm: 245 mm
• Weight: 16.8 kg
• Noise (sound pressure level) in dBA at 50 Hz or 1500 rpm/62% (VARIO)/1500 rpm (VARIO-SP)/12500 Upm (VACUU·PURE®): 43 dBA
• ATEX conformity: II 3/- G Ex h IIC T3 Gc X Internal Atm. only
• NRTL certification: No
• Items supplied: Pump completely mounted, ready for use, with manual.
• Rated mains voltage range 1: 200-230 V
• Mains frequency 1: 50-60 Hz
• Interface: Ethernet (RJ45): Modbus TCP / USB (Type A): Data transfer, software update, RS-232 (additional adapter required)
• Technical Information Sheet: