Laboratory vacuum pump MD 4C EX VARIO®

diaphragm1-workstation

Overview

• All benefits of ATEX chemistry diaphragm pumps
• VARIO®: short process times due to hysteresis-free VARIO® vacuum control
• VARIO®: pump runs on demand only as fast as necessary – minimal energy consumption, extended maintenance intervals, quiet operation
• VARIO®: vacuum controller VACUU·SELECT (optional) for precise vacuum control and fully automatic processes
• Additional devices such as ATEX vacuum sensor and Connection Box 100 required for full automated operation (available separately)

Product details

• Ultimate vacuum: 3 mbar
• Ultimate vacuum with gas ballast: 10 mbar
• Max. pumping speed (50 Hz): 3.7 m³/h

Description
With the ATEX VARIO® chemistry diaphragm pump MD 4C EX VARIO, vacuum is precisely controlled by motor speed. The VARIO® pump is driven via an additional control signal line (4–20 mA). The optional VACUU·SELECT vacuum controller together with an ATEX vacuum sensor and Connection Box 100 enable fully automatic evaporations without parameter input or user programming. Adaptive control detects the boiling pressure and continuously adjusts the vacuum optimally to the vapor pressure. For safety and compliance, the vacuum controller and Connection Box 100 are installed in a non-hazardous area.

Technical data and graphs
Max. pumping speed (50 Hz): 3.7 m3/h
Ultimate vacuum: 3 mbar / 2.3 torr
Ultimate vacuum with gas ballast: 10 mbar / 7.5 torr
Number of heads: 4
Number of stages: 3
Vacuum controller: without controller (optional separately)
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: small flange KF DN 25
Outlet connection: small flange KF DN 16
Rated motor power: 0.25 kW
Minimum motor speed VARIO: 30 min-1
Maximum motor speed VARIO: 1500 min-1
Protection class IEC 60529: IP 54
Dimensions (L x W x H): 469 x 265 x 305 mm
Weight: 28 kg
Noise (sound pressure level) at 50 Hz: 42 dBA
ATEX conformity: Pumping chamber (pumped gases): II 2G Ex h IIC T3 Gb X; Environment with inert purge gas: II 2G Ex h IIB T4 Gb X; Environment without inert purge gas: II 3G Ex h IIB T4 Gc X; Motor: II 2G Ex db IIB T4 Gb

Items supplied

• Pump fully assembled, with manual
• Speed control via 4–20 mA current loop (4 mA = 0 rpm, 20 mA = 1500 rpm)
• Control signal and mains cable length: 10 m each, without plugs (open ends)
• Additional devices required for automated operation (Connection Box, controller, vacuum sensor) available separately

Characteristics / technical specifications

• Model: MD 4C EX VARIO
• Brand: VACUUBRAND
• Articleno.: 20696936
• Max. pumping speed (50 Hz): 3.7 m³/h
• Ultimate vacuum: 3 mbar (2.3 torr)
• Ultimate vacuum with gas ballast: 10 mbar (7.5 torr)
• Number of heads: 4
• Number of stages: 3
• Rated motor power: 0.25 kW
• Motor speed VARIO range: 30 – 1500 min⁻¹
• Protection class: IP 54
• Dimensions (L x W x H): 469 x 265 x 305 mm
• Weight: 28 kg
• Noise: 42 dBA (50 Hz)
• Connections: Inlet KF DN 25, Outlet KF DN 16
• Max. back pressure (abs.): 1.1 bar
• Rated mains voltage: 230 V
• Mains frequency: 50 Hz
• ATEX conformity: see certification details above