Edwards EXT70H - REBUILT

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In stock
Weight 15 lbs
Pumping Speed 52-67 l s-1
Ultimate Pressure 5 x 10-9 mbar

Edwards EXT70H Turbomolecular Vacuum Pump - REBUILT

The Edwards EXT turbomolecular and compound molecular pumps provide a reliable, hydrocarbon-free high and ultra high vacuum. Utilizing multi-stage axial flow turbines combined with magnetic and ceramic bearings, the EXT design provides oil and vibration free operation with minimal maintenance on high critical foreline pressure processes.

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Inlet flange DN 63 ISO-K / DN 63 CF / DN 40 NW / DN 100 ISO-K
Pumping Speed
N2 ISO-63 / 63 CF (DN 40 NW) (ISO-100) 61 ls-1 (42 ls-1) (66 ls-1)
He ISO-63 / 63 CF (DN 40 NW) (ISO-100) 57 ls-1 (49 ls-1) (59 ls-1)
H2 ISO-63 / 63 CF (DN 40 NW) (ISO-100) 53 ls-1 (48 ls-1) (54 ls-1)
Compression ratio
N2 > 1 × 1011
He 1 x 106
H2 5 x 104
Ultimate Pressure (mbar)
w/ RV backing pump ISO / CF < 5 x 10-9 / 5 x 10-10
w/ diaphragm backing pump ISO/CF < 5 x 10-8 / 5 x 10-9
Outlet flange DN 16 NW
Recommended backing pump* RV5 / nXDS6i
Vent port 1/8 inch BSP
Purge port 1/8 inch BSP
Max continuous inlet pressure (light gas pumping)
Water cooling (water at 15°C, ambient temp at 40°C) 2 × 10-2 mbar
Forced air cooled, 35°C ambient 1 × 10-2 mbar
Pump rotational speed
Nominal rotational speed 90,000 rpm
Standby rotational speed Variable from 49,500 to 90,000 rpm
(63,000 rpm default)
Programmable power limit settings Variable from 50-120W (80W default)
Start time to 90% speed 110 s ‡
Analogue outputs Rotational speed;
Power consumption; Pump temp; Controller temp
Cooling method# Forced air / water
Ambient air temperature for forced air cooling 5 - 35°C
Min cooling water flow rate (water 15°C) 15 l h-1
Water temp range 10 - 20°C
Max inlet flange temp 100°C
Operating attitude Vertical and upright, through to
Noise level at 1 metre < 50 dB(A)
Max magnetic field pump can tolerate 5 mT
Recommended controller TIC 100 turbo and instrument controller
Quiescent electrical power 10 W

* A smaller backing pump may be used depending on application. A suitable diaphragm pump with ultimate < 5 mbar may also be used e.g. XDD1.
† Above this inlet pressure, rotational speed drops to below nominal.
‡ Power limit set to 80 W.
# Air and water cooling accessories must be ordered separately

Type Label Description Download
BOC Edwards EXT Series - REBUILT User's Manual Download

Need modifications to this item? PTB Sales' expert team of engineers can configure products to your specific needs.

Edwards MODEL EXT70H Turbomolecular Vacuum Pump - REBUILT

CODE B722-23-000 / B72223000  EXT70H  DN 40 NW
CODE B722-22-000 / B72222000  EXT70H  DN 63 CF
CODE B722-21-000 / B72221000  EXT70H  DN 63 ISO-K
     B722-28-000 / B72228000  EXT70HI  DN 63 CF
     B722-29-000 / B72229000  EXT70HI  DN 63 ISO-K        
     B722-26-991 / B72226991  EXT70H  ISO-100 24V
     B722-01-000 / B72201000  EXT70  DN 63 ISO-K