Chemistry diaphragm pump MZ 2C EX


VACUUBRAND20696920ca. 251 mmca. 287 mmca. 21.6 kg20696920

ATEX chemistry diaphragm pumps offer all advantages of oil-free chemistry diaphragm pumps. Typical applications are rotary evaporators and drying ovens with potentially explosive atmospheres. The ATEX approval includes the interior of the pump (in contact with pumped gases) as well as the surrounding area of the pump. All wetted parts of the pumps have excellent chemical resistance and are mainly made of antistatic materials. Included in delivery is a separate gas ballast connection part for use of inert gas.

Performance features

  • outstanding chemical resistance and superior vapor tolerance
  • flame proof motor with integrated, self-locking overload and excess temperature protection for direct 230V / 50Hz single phase power supply. No need for any additional and specific overcurrent protection device
  • overpressure safety relief valves internally and at outlet
  • safety diaphragm technology with option for inert gas purge and detection of diaphragm breakage


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Technical data

Unit Converter
Technical dataUnit MZ 2C EX
Number of heads / stages2 / 2
Max. pumping speedm3/h1.9
Max. pumping speedcfm1.1
Ultimate vacuum (abs.)mbar/torr12 / 9
Ultim. vac. (abs.) with gas ballastmbar/torr18 / 13.5
Integral leakage ratembar l/s0.1
Ambient temperature range (operation)°C10 - 40
Ambient temperature range (storage)°C-10 - 60
Max. media temperature°C40
Max. back pressure (abs.)bar1.1
Inlet connectionsmall flange KF DN 16
Outlet connectionsmall flange KF DN 16
Rated motor powerkW0.15
Max. operating currentA1.2
Max. starting currentA5.5 A / 125 ms
Rated speedmin-11500
Protection classIP 54
Dimensions (L x W x H), approx.mm337 x 287 x 251
Weight, approx.kg21.6
Noise level at 50 Hz, typ.dBA50
ATEX conformityPumping 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 suppliedPump completely mounted, ready for use, with manual, 2 m cable without plug.
AccessoriesPTFE tubing KF DN 16 (1000 mm: 20686031)

MZ 2C EX - Pumping speed graph at 50 Hz

MZ 2C EX - Pumping speed graph at 50 Hz

MZ 2C EX - Pump down graph at 50 Hz (100 l volume)

MZ 2C EX - Pump down graph at 50 Hz
(100 l volume)

MZ 2C EX - Dimension sheet

MZ 2C EX - Dimension sheet

-Technical data are subject to change without notice-

Ordering data

Product nameMains voltage and frequencyPlugOrder no.
MZ 2C EX 230 V~ 50 Hz
Open wires 20696920
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