Мембранный насос VARIO® MD 12 VARIO select


VACUUBRAND20743150ca. 450 mmca. 260 mmca. 28.3 kg20743150

This three-stage diaphragm pump is an powerful solution for continuous, oil-free pumping of non-corrosive gases to a vacuum level as deep as 1.5 mbar. With its high pumping speed, this pump is an excellent option for higher gas load applications or rapid pump down of vacuum chambers. All wetted parts are made of aluminum, stainless steel and carefully selected plastics suitable for a wide range of applications with non-corrosive gases. The MD 12 VARIO select automatically adapts its motor speed to hold the desired vacuum level. That also means the pump is whisper-quiet and generates ultra-low vibrations, and has high leak tightness. The highly flexible fabric-reinforced double FKM diaphragm is ideal for extended operating life. The VARIO design includes the variable speed pump and the VACUU·SELECT vacuum controller with an external gauge head. The demand-responsive motor speed control on VARIO models further extends the already long lifetimes of diaphragms and valves. And oil-free operation means that there is no risk of contamination from backstreaming.

Performance features

  • VACUU·SELECT vacuum controller with graphical user interface and predefined applications simplifies work in the laboratory
  • extraordinary diaphragm life for minimum operational and servicing costs
  • contamination-free pumping and evacuation
  • high pumping speed and excellent ultimate vacuum and TURBO·MODE for use as backing pump for turbo pumps


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Technical data

Конвертор величин
Technical dataUnit MD 12 VARIO select
Vacuum controllerVACUU·SELECT
Number of heads / stages8 / 3
Max. pumping speedm3/h16.0
Max. pumping speedcfm9.4
Ultimate vacuum (abs.)mbar/torr1.5 / 1.1
Ambient temperature range (operation)°C10 - 40
Ambient temperature range (storage)°C-10 - 60
Max. back pressure (abs.)bar1.1
Inlet connectionSmall flange KF DN 25
Outlet connectionSilencer / G1/2"
Rated motor powerkW1.0
Motor speed rangemin-130 - 2400
Rated speedmin-11500/1800
Degree of protectionIP 40
Dimensions (L x W x H)mm552 x 260 x 450
Noise level at 50 Hz, typ.dBA50
ATEX conformity (only 230V)II 3/- G IIC T3 X Internal Atm. only
Items suppliedPump completely mounted, ready for use, with manual.
AccessoriesStainless steel tubing KF DN 25 (1000 mm: 20673337)
Hose nozzle DN 15 mm / G1/2" (20642472)
Small flange KF DN 16 / G1/2" (20672101)
Vent valve VB M-B (20674217)

MD 12 VARIO select - Pumping speed graph

MD 12 VARIO select - Pumping speed graph

MD 12 VARIO select - Pump down graph (100 l volume)

MD 12 VARIO select - Pump down graph
(100 l volume)

MD 12 VARIO select - Dimension sheet

MD 12 VARIO select - Dimension sheet

-Technical data are subject to change without notice-

Ordering data

Product nameMains voltage and frequencyPlug* Order no.
MD 12 VARIO select 200-230 V~ 50-60 Hz
100-120 V~ 50-60 Hz
CEE 20743150
200-230 V~ 50-60 Hz
100-120 V~ 50-60 Hz
US 20743153

* Пожалуйста обратите внимание на изменение номеров для заказа. В связи с введением новой ERP-системы в 2018 году все номера
заказов будут изменены и состоять из восьми цифр: к старым номерам будет в начале добавлена цифра 20 или 2.

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MD 12 VARIO select