Edwards EXT75DX User Manual

B722-40-880 Issue F
Page 10 © Edwards Limited 2013. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Technical data
with diaphragm backing pump:
‡
<5 x 10
-8
mbar
(DN100ISO-K inlet
flange)
<5 x 10
-8
mbar
(DN100ISO-K inlet
flange)
<5 x 10
-9
mbar
(DN100CF inlet flange)
*
Pumping speeds are without inlet screen or inlet strainer. Inlet screens and inlet strainers reduce speed by
approximately 10%.
†
Ultimate pressure 48 hours after bakeout with 2-stage rotary vane backing pump
‡
Ultimate pressure 48 hours after bakeout with P
b
< 5 mbar (500 Pa).
Table 5 - DX pumps technical data
Parameter EXT75DX EXT255DX
Critical backing pressure
*
*
Pumping speed is reduced to 90% of its original value.
N
2
8 mbar 12 mbar
He 6.5 mbar 9 mbar
H
2
2.5 mbar 2.5 mbar
Minimum backing pump displacement 0.6 m
3
h
-1
0.6 m
3
h
-1
Maximum Continuous Backing Pressure
†
(at Ultimate Inlet Pressure)
†
Above this pressure, rotational speed drops below nominal. Values for maximum continuous inlet pressure
obtained using a RV12 backing pump. Refer to Section 3.9 for cooling conditions.
Nitrogen:
Water Cooling (40 °C ambient)
‡
‡
Cooling water temperature at 15 °C. Cooling water flow rate at 30 l hr
-1
.
4 mbar 7 mbar
Forced Air Cooling (35 °C ambient) 5 mbar 5 mbar
Natural Convection Cooling (30 °C ambient) 2 mbar 2 mbar
Maximum continuous inlet pressure
†
(at Ultimate Backing Pressure)
Nitrogen:
Water cooling (40 ºC ambient)
‡
2 x 10
-2
mbar 1 x 10
-2
mbar
Forced Air cooling at (35 ºC ambient) 3 x 10
-2
mbar 8 x 10
-3
mbar
Natural Convection Cooling (30 °C ambient) 8 x 10
-3
mbar 2 x 10
-3
mbar
Argon:
Water cooling (40 ºC ambient)
‡
4 x 10
-3
mbar 7 x 10
-3
mbar
Forced Air cooling at (35 ºC ambient) 4 x 10
-3
mbar 5 x 10
-3
mbar
Natural Convection Cooling (30 °C ambient) 1 x 10
-3
mbar 1 x 10
-3
mbar
Recommended backing pump
**
**
A suitable diaphragm pump with ultimate <5 mbar may also be used.
RV3 RV12
Operating attitude Vertical and upright
through to horizontal  2 °
Vertical and upright
through to horizontal  2 °
Nominal rotational speed 90,000 revolutions per
minute
60,000 revolutions per
minute
Starting time to 90% speed
††
††
Power limit setting 80 W (EXT75DX), 160 W (EXT255DX).
110 seconds 78 seconds
Sound power level (1 metre away) < 50 dB(A) <50 dB(A)
Table 4 - DX pumps technical data (continued)
Parameter EXT255DX ISO100 EXT255iDX ISO100
EXT255DX
100CF

Edwards EXT75DX Specifications

General

Brand	Edwards
Model	EXT75DX
Category	Water Pump
Language	English