VARIO® chemistry diaphragm pump MD 4C EX VARIO
MD 4C EX VARIO
VACUUBRAND20696936ca. 305 mmca. 265 mmca. 28 kgWith the new ATEX VARIO® chemistry diaphragm pumps and vacuum systems, the vacuum can be precisely controlled by the motor speed. The VARIO® pump is driven by an additional control signal line. The optional vacuum controller CVC 3000 with system accessories (I/O-Module, supply / isolation amplifier) and ATEX vacuum sensor enable fully automatic evaporations without the need for parameter settings or user programming. With the adaptive control it finds the boiling pressure independently and adjusts the vacuum continuously and optimally according to the vapor pressure.
The vacuum controller and system accessories are installed in a non-hazardous area.
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 CVC 3000 (optional) for precise vacuum control and fully automatic processes
- complete system accessories I/O module, supply / isolation amplifier and ATEX vacuum sensor - 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 |
| Degree of protection | 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 IIC T3 X Environment with inert purge gas: II 2G IIB T4 X Environment without inert purge gas: II 3G IIB T4 X Motor: II 2G Ex d 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) Analog I/O module VACUU·BUS 4-20mA / 0-10V (20635425) Signal conditioner 0-10V/4-20mA (20635426) Power/input isolating amplifier 4-20mA (20635427) Vacuum sensor ATEX +-1 mbar 4-20mA (20635423) Vacuum sensor ATEX +-3 mbar 4-20mA (20635424) Vacuum controller CVC 3000 (20635028+20612090) VACUU·BUS® male plug with cable 2m (20612462) |
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-
Ordering data
| Product name | Mains voltage and frequency | Plug | * Order no. |
|---|---|---|---|
| MD 4C EX VARIO | 230 V~ 50 Hz | Open wires | 20696936 |
* 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.
Product comparison
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | | |||||||||||||
Chemistry diaphragm pump | - | 12 | 18 | 1.9 |  | | - | - | - | - | - | - | - | - |
Chemistry diaphragm pump | - | 3 | 10 | 3.7 | | | - | - | - | - | - | - | - | - |
VARIO® chemistry diaphragm pump | - | 3 | 10 | 3.7 | | | - | - | - | - | - | - | | - |
Chemistry diaphragm pump | - | 2 | 10 | 8.1 | | | - | - | - | - | - | - | - | - |
Chemistry diaphragm pump+AK+EK | - | 2 | 10 | 8.1 | | | - | - | - | - | - | - | - | - |
Chemistry diaphragm pumpVARIO | - | 2 | 10 | 8.1 | | | - | - | - | - | - | - | | - |
Chemistry vacuum system+AK+EK | MZ 2C EX | 12 | 18 | 1.9 | | | - | | | - | - | - | - | - |
Chemistry vacuum system+AK+EK | MD 4C EX | 3 | 10 | 3.7 | | | - | | | - | - | - | - | - |
VARIO® chemistry vacuum systemVARIO +AK+EK | MD 4C EX VARIO | 3 | 10 | 3.7 | | | - | | | - | - | - | | - |
VARIO® chemistry diaphragm pumpVARIO +AK+EK | MV 10C EX VARIO | 2 | 10 | 8.1 | | | - | | | - | - | - | | - |
