page 27 of 76
Gas inlet temperatures
* if pumping potentially explosive atmospheres: 50 °F to 104 °F (+10 °C to +40 °C)
Operating condition
Inlet pressure
Permitted range of gas
temperatures at inlet
Continuous operation
> 75 Torr (100 mbar)
(high gas load)
➨
50 °F to 104 °F
(+10 °C to +40 °C)
Continuous operation
< 75 Torr (100 mbar)
(low gas load)
➨
32 °F to 140 °F*
(0 °C to +60 °C*)
Short-time
(< 5 minutes)
< 75 Torr (100 mbar)
(low gas load)
➨
14 °F to 176 °F*
(-10 °C to +80 °C*)
* Ultimate vacuum at setting ”Pump down” with optimized speed close to the ultimate vacuum
** Measurement according to EN ISO 2151:2004 and EN ISO 3744:1995 at 1500 rpm and ulti-
mate vacuum with exhaust tube at outlet.
Type
ME 4C
VARIO
select
MZ 2C
VARIO
select
MD 4C
VARIO
select
Maximum pumping speed
50/60 Hz (ISO 21360)
cfm
(m
3
/h)
2.9
(4.9)
1.66
(2.8)
2.7
(4.6)
Ultimate vacuum (abso-
lute) without gas ballast*
Torr
(mbar)
52.5
(70)
5.3
(7)
1.1
(1.5)
Ultimate vacuum (abso-
lute) with gas ballast*
Torr
(mbar)
-
-
9
(12)
2.3
(3)
Maximum rated current at:
100-120 V~ 50/60 Hz
200-230 V~ 50/60 Hz
A
A
3.2
1.4
3.2
1.4
6.3
2.5
Inlet
hose nozzle for tubing I.D. 3/8“
(hose nozzle DN 10 mm)
Outlet
silencer or
-
hose nozzle for tubing I.D. 3/8“
(hose nozzle DN 10 mm)
A-weighted emission
sound pressure level**
(uncertainty K
pA
: 3 dB(A))
dB(A)
45
43
Dimensions L x W x H
approx.
in
(mm)
10.0 x 9.57 x
9.65
(254 x 243 x
245)
9.57 x 9.57 x
9.65
(243 x 243 x
245)
12.8 x 9.57 x
9.65
(325 x 243 x
245)
Weight approx.
lbs. (kg) 30.4 (13.8)
30.4 (13.8)
35.9 (16.3)
