Absolute Vacuum present the Edwards® range of EXT turbomolecular and compound molecular pumps and EXC Controllers
for high and ultra
high vacuum.Edwards®EXT255H compound turbomolecular pump
Edwards®
EXT255H compound turbomolecular molecular pump - Technical
data
Inlet
flange: DN100ISO-K or DN100CF
Outlet
flange: DN25NW
Vent-port:
1/8 inch BSP female
Purge-port:
1/8 inch BSP female
Pumping
speed*
N2:
220 l s-1
He:
230 l s-1
H2:
180 l s-1
Compression
ratio
N2:
>1 × 108
He:
4 × 105
H2:
1.6 × 104
Recommended
backing pump: RV3
Maximum
continuous inlet pressure
water
cooling at 15 °C, 40 °C ambient: 5 × 10-3
mbar
air
cooling at 35 °C ambient: 5 × 10-3 mbar
free
convection at 40 °C ambient: 4 × 10-4 mbar
Nominal
rotational speed: 60000 rpm
Standby
rotational speed: 42000 rpm
Run-up
time to 90% speed
EXC100E:
190 s
EXC120:
130 s
EXC300:
100 s
Cooling
method: Forced air or water
Maximum
inlet flange temperature: 100 °C
Ambient
air temperature operating range with forced air cooling: 0-35
°C
Water
temperature range (for water cooling): 10-20
°C
Minimum
water flow rate (at 15 °C): 15 L h-1
Operating
attitude:
Vertical and upright, through to
horizontal
Noise
level at 1 metre: <50 dB(A)
Maximum
magnetic field: 5 mT
Recommended
Controller
(80
V): EXC100, EXC120 or EXC300
(24
V d.c.): EXDC80 and EXDC160
Other
compatible Controller: EXC300
Quiescent
electrical power: 25 W
nterstage
pumping speed (Hi variant)
N2:
10 l s-1
H2:
10 l s-1
Inlet
flange DN100ISO-K DN100CF
Ultimate
pressure (mbar)
Rotary
vane pump <5 × 10-9 <5 × 10-10
Diaphragm
pump <5 × 10-8 <5 × 10-9
Weight
(kg) 5.6 8.2
Edwards® EXT255H compound turbomolecular pump – Pumping speed
EXT 255H turbo pump - pumping
speed vs inlet pressure
Edwards® EXT255H compound turbomolecular pump – Throughput
EXT 255H turbo pump - Throughput
vs inlet pressure
Edwards® EXT255H compound turbomolecular pump – Dimensions
A
Backing
port (outlet flange)
B
Purge-port (adaptor shown fitted)
C
Electrical supply connector
D
Vent-valve
E
Cooling-water
connector
F
Allowance
for right-angle cable connector
G
Earth
bond point
Edwards® EXT255H compound turbomolecular molecular pump
Product
description Part No.
Pump
Inlet flange
EXT255H
DN100ISO-K B75301000
EXT255H
DN100CF B75302000
EXT255Hi
DN100ISO-K B75303000
Edwards® TIC
compatible packages* (24 V d.c.)
EXT255H
DN100ISO-K B75301991
EXT255H
DN100CF B75302991
EXT255Hi
DN100ISO-K B75303991
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