Edwards EH250FX

© Edwards Limited 2014. All rights reserved. Page 9
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Technical Data
A301-05-880 Issue A
2.11 Materials of construction of components exposed to pumped
gases
2.12 Azide compatibility
The standard pumps are not Azide compatible as they are fitted with copper cooling coils which are exposed to
process. For further information, contact Edwards.
2.13 Item Numbers
Table 11 - Materials of construction
Stator and headplates
Rotors
Hydrokinetic drive/gearbox cover
Housing O-rings
Hydrokinetic drive/gearbox shaft seals
Internal pump shaft seals
Hydrokinetic drive/gearbox cooling coils
EH1200, EH2600 and EH4200 after-cooler
Headplate jointing compound
Grey cast iron, grade 250 (BS1452)
SG iron, grade 420/12 (BS2789)
Aluminium LM25TF (BS1490)
Fluoroelastomer
Fluoroelastomer
PTFE (polytetrafluoroethylene)
Copper/brass
Copper/brass
Loctite 518
Table 12 - Item numbers
380/400 V 230/460 V 200 V 200/380 V
3 phase 3 phase
50 Hz 60 Hz 50 Hz 60 Hz
Hydrocarbon
EH250 A301-05-945 A301-06-946 A301-05-934 A301-06-934
EH500 A302-05-945 A302-06-946 A302-05-934 A302-06-934
EH1200 A305-05-945 A305-06-946 A305-05-934 A305-06-934
EH2600 A307-05-945 A307-06-946 A307-05-934 A307-06-934
EH4200 A309-05-945 A309-06-946 A309-05-934 A309-06-934
PFPE
EH250FX A301-07-945 A301-08-946 A301-07-934 A301-08-934
EH500FX A302-07-945 A302-08-946 A302-07-934 A302-08-934
EH1200FX A305-07-945 A305-08-946 A305-07-934 A305-08-934
EH2600FX A307-07-945 A307-08-946 A307-07-934 A307-08-934
EH4200FX A309-07-945 A309-08-946 A309-07-934 A309-08-934