Rotary evaporator vacuum pump MD 4C EX VARIO

laboratorydiaphragmmulti-stage

Overview

• ATEX-certified VARIO® chemistry diaphragm pump unit with inlet separator (AK) and emission condenser (EK) for handling solvent vapors in hazardous-area applications
• VARIO® speed control for hysteresis-free, demand-driven vacuum regulation
• Optional VACUU·SELECT vacuum controller with ATEX vacuum sensor and Connection Box 100 enables fully automatic, adaptive evaporation processes

Applications

• Laboratory and pilot-scale chemical processes, rotary evaporation, distillation and solvent recovery in potentially explosive atmospheres (where ATEX certification is required)
• Integration into automated process lines where precise vacuum control and remote speed setpoint are required

Key features

• Model: MD 4C EX VARIO +AK+EK (article no. 20696937)
• Ultimate vacuum: 3 mbar (10 mbar with gas ballast)
• Max. pumping speed (50 Hz): 3.7 m3/h
• Heads / stages: 4 heads, 3 stages
• VARIO® motor speed range: 30 – 1500 min-1 (control via 4–20 mA current loop)
• Rated power: 0.25 kW • Protection class: IP54 • Noise: 42 dBA (50 Hz)
• Inlet: small flange KF DN 25 • Outlet: hose nozzle DN 8–10 mm • Coolant: 2 × hose nozzle DN 6–8 mm
• Max. back pressure (abs.): 1.1 bar • Rated voltage: 230 V, 50 Hz

Product description
The MD 4C EX VARIO +AK+EK is a compact ATEX chemistry vacuum system that provides precise vacuum control by varying motor speed. The VARIO® pump accepts an external control signal and runs only as fast as necessary, reducing energy consumption and extending maintenance intervals. For fully automated evaporations the optional VACUU·SELECT vacuum controller with ATEX vacuum sensor and Connection Box 100 performs adaptive control: it detects boiling pressure and continuously adjusts the vacuum to the vapor pressure without manual parameter input. The controller and Connection Box 100 are installed in non-hazardous areas.

Technical data (selected)

• Ultimate vacuum: 3 mbar / 2.3 torr • With gas ballast: 10 mbar / 7.5 torr
• Max. pumping speed (50 Hz): 3.7 m3/h
• Number of heads: 4 • Number of stages: 3
• VARIO® speed range: 30 – 1500 min-1 • Control: 4–20 mA (4 mA = 0 rpm, 20 mA = 1500 rpm)
• Dimensions (L×W×H): 600 × 365 × 420 mm • Weight: 36 kg
• ATEX conformity (summary): Pumping chamber and motor certifications depend on configuration (see technical sheet)

Scope of supply & notes

• Pumping unit fully assembled with inlet separator AK and emission condenser EK, includes manual (article no. 20696937)
• Control signal and mains cable length: 10 m each, without plugs; speed control via 4–20 mA
• Shatter/impact protection for glass parts to be provided by the customer
• Additional devices required for automatic operation: ATEX vacuum sensor, Connection Box 100 and vacuum controller (VACUU·SELECT) — available separately