- ATEX pumps
- ATEX VARIO chemistry diaphragm pumps
- MD 4C EX VARIO
VARIO® chemistry diaphragm pump MD 4C EX VARIO
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Performance features
- full advantage of ATEX chemistry diaphragm pumps
- VARIO®: short process times due to hysteresis-free VARIO® vacuum control
- VARIO®: VARIO®-pump operates on demand only as fast as necessary – minimal power consumption, extended maintenance intervals, silent operation
- VARIO®: vacuum controller VACUU·SELECT (optional) for precise vacuum control and fully automatic processes
- ATEX vacuum sensor and Connection Box 100 for easy installation – from one source
Technical data
| Technical data | Unit | MD 4C EX VARIO |
|---|---|---|
| Vacuum controller | without controller | |
| Number of heads / stages | 4 / 3 | |
| Max. pumping speed | m3/h | 3.7 |
| Max. pumping speed | cfm | 2.2 |
| Ultimate vacuum (abs.) | mbar/torr | 3 / 2.3 |
| Ultim. vac. (abs.) with gas ballast | mbar/torr | 10 / 7.5 |
| Integral leakage rate | mbar l/s | 0.1 |
| Ambient temperature range (operation) | °C | 10 - 40 |
| Ambient temperature range (storage) | °C | -10 - 60 |
| Max. media temperature | °C | 40 |
| Max. back pressure (abs.) | bar | 1.1 |
| Inlet connection | small flange KF DN 25 | |
| Outlet connection | small flange KF DN 16 | |
| Rated motor power | kW | 0.25 |
| Max. operating current | A | 3.2 |
| Max. starting current | A | 150A / 2.5ms |
| Motor speed range | min-1 | 30 - 1500 |
| Rated speed | min-1 | 1500 |
| Protection class | IP 54 | |
| Dimensions (L x W x H), approx. | mm | 469 x 265 x 305 |
| Weight, approx. | kg | 28 |
| Noise level at 50 Hz, typ. | dBA | 42 |
| 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 completely mounted, ready for use, with manual. Speed control via 4-20 mA current loop (4 mA = 0 rpm, 20mA = 1500 rpm). Control signal and mains cable length 10 m, without plugs. | |
| Accessories | PTFE tubing KF DN 16 (1000 mm: 20686031) PTFE tubing KF DN 25 (1000 mm: 20686033) Vacuum sensor ATEX 0,1% FSO* 4-20mA (20635423) Vacuum sensor ATEX 0,3% FSO* 4-20mA (20635424) Vakuum-Controller VACUU·SELECT (20700050) Connection Box 100 (20635435) |
In der Connection Box 100 sind mehrere Komponenten verbaut, die für die Auswertung des Sensorsignals erforderlich sind. Durch diese Messkette steigt die Unsicherheit des am Vakuum Controller angezeigten Vakuumwertes auf +- 3 mbar (für Sensor 20635423 mit FSO 0,1 %) und +- 4 mbar (für Sensor 20635424 mit FSO 0,3 %).
MD 4C EX VARIO - Pumping speed graph MD 4C EX VARIO - Pump down graph (100 l volume) |
MD 4C EX VARIO - Dimension sheet |
MD 4C EX VARIO - Configuration example |
-Technical data are subject to change without notice-
Product comparison
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | |  |  | |||||||||||||
VARIO® chemistry diaphragm pumpMD 4C EX VARIO | - | 3 | 10 | 3.7 | 3.7 |  | | - | - | - | - | - | - | | - | - |
VARIO® chemistry vacuum systemMD 4C EX | MD 4C EX VARIO | 3 | 10 | 3.7 | 3.7 | | | - | | | - | - | - | | - | - |
Chemistry diaphragm pumpMV 10C EX | - | 2 | 10 | 8.1 | 8.1 | | | - | - | - | - | - | - | | - | - |
VARIO® chemistry diaphragm pumpMV 10C EX | MV 10C EX VARIO | 2 | 10 | 8.1 | 8.1 | | | - | | | - | - | - | | - | - |
