VARIO® chemistry diaphragm pump MD 4C VARIO select

VARIO<sup>®</sup> chemistry diaphragm pump MD 4C VARIO select
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MD 4C VARIO select

MD 4C VARIO select

VACUUBRAND20736550ca. 245 mmca. 243 mmca. 16.8 kg

The MD 4C VARIO select pump is an excellent solution for labs working with most high boiling point solvents. The pump's three stage configuration gives it an ultimate vacuum rating of 1.5 mbar.
The integrated VACUU·SELECT controller provides an easy-to-use, application based interface that covers all common lab applications. The VACUU·SELECT controller has you covered. Use manual set-point-control for simple processes, run fully automated distillations, or create your own application with simple drag-and-drop editing. For solvent evaporation, the VACUU·SELECT controller continuously detects the boiling point and automatically adjusts the vacuum process as necessary. VARIO's on-demand motor speed control results in whisper-quiet operation and unparalleled length of service intervals for wear parts.

Performance features

  • VACUU·SELECT vacuum controller with graphical user interface and predefined applications simplifies work in the laboratory
  • automatic boiling point detection and adjustment of the vacuum for short process times
  • extraordinary diaphragm life for minimum operational and servicing costs
  • meets high vacuum requirements for most high boiling solvents

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Technical data

Unit Converter
Technical dataUnit MD 4C VARIO select
Vacuum controllerVACUU·SELECT
Number of heads / stages4 / 3
Max. pumping speedm3/h4.6
Max. pumping speedcfm2.7
Ultimate vacuum (abs.)mbar/torr1.5 / 1.1
Ultim. vac. (abs.) with gas ballastmbar/torr3 / 2.2
Ambient temperature range (operation)°C10 - 40
Ambient temperature range (storage)°C-10 - 60
Max. back pressure (abs.)bar1.1
Inlet connectionHose nozzle DN 8-10 mm
Outlet connectionHose nozzle DN 8-10 mm
Rated motor powerkW0.53
Motor speed rangemin-130 - 2400
Degree of protectionIP 20
Dimensions (L x W x H)mm325 x 243 x 245
Weightkg16.8
Noise level at 50 Hz, typ.dBA43
ATEX conformity (only 230V)II 3/- G IIC T3 X Internal Atm. only
Items suppliedPumping unit completely mounted, ready for use, with manual.
AccessoriesVent valve VB M-B (20674217)
Rubber vacuum tubing DN 8 mm (20686001)

MD 4C VARIO select - Pumping speed graph

MD 4C VARIO select - Pumping speed graph

MD 4C VARIO select - Pump down graph (10 l volume)

MD 4C VARIO select - Pump down graph
(10 l volume)

MD 4C VARIO select - Dimension sheet

MD 4C VARIO select - Dimension sheet

-Technical data are subject to change without notice-

Ordering data

Product nameMains voltage and frequencyPlug* Order no.
MD 4C VARIO select 200-230 V~ 50-60 Hz
CEE 20736550
200-230 V~ 50-60 Hz
CH 20736551
100-120 V~ 50-60 Hz
US 20736553
200-230 V~ 50-60 Hz
CN 20736556
200-230 V~ 50-60 Hz
IN 20736557

* As part of the implementation process of our new ERP system in 2018 our catalog numbers were extended to 8 digits in length by adding the digits “2” or “20” to the beginning of the old catalog numbers.

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