Edwards EH500T4 T3 Series User manual

EH Mechanical Booster Pumps
INSTRUCTION MANUAL
A30151880_AA Original instrucons
edwardsvacuum.com

Copyright noce
©Edwards Limited 2020. All rights reserved.
Associated publicaons
Publicaon tle Publicaon number
Vacuum Pump and Vacuum Systems safety manual P40040100
ATEX Instrucon Manual P60060200
Trademark credit
Edwards and the Edwards logo are trademarks of Edwards Limited, Innovaon Drive,
Burgess Hill, West Sussex RH15 9TW.
Disclaimer
The content of this manual may change from me to me without noce. We accept
no liability for any errors that may appear in this manual nor do we make any
expressed or implied warranes regarding the content. As far as praccal we have
ensured that the products have been designed and constructed to be safe and without
risks when properly installed and used in accordance with their operang instrucons.
We accept no liability for loss of prot, loss of market or any other indirect or
consequenal loss whatsoever.
Product warranty and limit of liability are dealt with in our standard terms and
condions of sale or negoated contract under which this document is supplied.
You must use this product as described in this manual. Read the manual before you
install, operate, or maintain the product.

Europe USA Asia
220-240 V
380-415 V
3 phase
230 V/460 V
3 phase
200/380 V
3 phase
* 50 Hz 60 Hz 50 Hz 60 Hz
Hydrocarbon
EH250IND SA A30151945 A30152946 A30151934 A30152934
EH500IND SA A30271945 A30272946 A30271934 A30272934
EH1200IND SA A30590935 A30591936 A30590934 A30591934
EH2600IND SA A30775946‡A30776982** A30753934 A30754934
EH4200IND SA A30975946‡A30976982** A30975932 A30976934
PFPE
EH250FX SA A30153935 A30154936 A30153934 A30154934
EH500FX SA A30273935 A30274936 A30273934 A30274934
EH1200FX SA A30592935‡A30593936 A30592934 A30593934
EH2600FX SA A30753935 A30754936 A30775934 A30776934
Chemical Pumps (ATEX and Flammable)
EH250C FP NRA997000**
EH250T4 FP NRA996000‡
EH500C FP NRA999000**
EH500T4…T3*** FP NRA998000‡
EH1200C FP A30556982†
EH1200T4 FP A30557900
EH2600C FP A30756982**
EH2600T3 FP A30741935‡
EH2600T4 FP A30779900‡
EH4200C FP A30956982**
EH4200T3 FP A30941935‡
EH4200T4 FP A30979900‡
* SA = Safe Area, FP = Flameproof, † 460 V only, ‡ 380-415 V only
** 230-460 V only
*** T4 must be used with a primary pump with a minimum value of 160 m3h-1

P20050027B
CE Declaration of Conformity
The following products
Safe Area Pumps – Hydrocarbon Oil
EH250 2.2kW
EH500 2.2kW
EH1200 3kW
EH2600 11kW
EH4200 11kW
200/380 V 50 Hz
A30151934
A30271934
A30590934
A30753934
A30975934
400 V 50 Hz
A30151945
A30271945
A30590935
A30775946
A30975946
200/38 0V 60 Hz
A30152934
A30272934
A30591934
A30754934
A30976934
460 V 60 Hz
A30152946
A30272946
A30591936
A30776982
A30976982
Safe Area Pumps – PFPE Oil
EH250 2.2kW
EH500 2.2kW
EH1200 3kW
EH2600 11kW
EH4200 11kW
200/380V 50Hz
A30153934
A30273934
A30592934
A30775934
-
400V 50Hz
A30153935
A30273935
A30592935
A30753935
NRA293000
200/380V 60Hz
A30154934
A30274934
A30593934
A30776934
-
460V 60Hz
A30154936
A30274936
A30593936
A30754936
NRA292000
Is in conformity with the relevant requirements of European CE legislation:
2006/42/EC
Machinery directive
2014/35/EU
Low voltage directive (LVD) as applicable to electrical sub-assemblies
2011/65/EU
Restriction of certain hazardous substances (RoHS) directive
as amended by Delegated Directive (EU) 2015/863
Based on the relevant requirements of harmonised standards:
EN 1012-2:1996 +A1:2009
Compressors and vacuum pumps. Safety requirements. Vacuum pumps
EN 60034-1:2010
Rotating electrical machines. Rating and performance
Documentation Officer:
Jelena Havelkova, Spielberk Office Centre, Holandska 10, Brno, 63900 Czech Republic,

: [phone],

: [email protected]
This declaration, based on the requirements of the listed Directives and EN ISO/IEC 17050-1, covers all product
serial numbers from this date on: 1st November 2019
_____________________________________
Andries De Bock – Vice President Engineering
Industrial Vacuum Division
Qingdao
__________________________________
Bram Claes – General Manager
Qingdao
Edwards Ltd
Innovation Drive
Burgess Hill
West Sussex
RH15 9TW
UK

CE Declaration of Conformity
P20050032B
The following product:
ATEX EH Booster Pumps – Hydrocarbon Oil
Internal II 1,2 G Ex h IIC T3, T4 Ga,Gb External II 2 G Ex h IIB T3, T4 Gb
EH250
2.2kW
EH500
2.2kW
EH1200
3kW
EH2600
11kW
EH4200
11kW
ATEX T3 - 400V 50Hz
-
NRA998000
-
A30741935
A30941935
ATEX T4 - 400V 50Hz
NRA996000
NRA998000
A30557900
A30779900
A30979900
Chemical EH Pumps 60Hz (Not ATEX)
C – 460V 60Hz
NRA997000
NRA999000
A30556982
A30756982
A30956982
Is in conformity with the relevant requirements of European CE legislation:
2014/34/EU
ATEX directive on use in potentially explosive atmospheres
Intertek Testing and Certification Limited, notified body no. 0359
Tech File Ref: TCF136
2011/65/EU
Restriction of certain hazardous substances (RoHS) directive
as amended by Delegated Directive (EU) 2015/863
Based on the relevant requirements of harmonised standards:
EN 1012-2:1996 +A1:2009
Compressors and vacuum pumps. Safety requirements. Vacuum pumps
EN ISO 80079-36:2016
Explosive atmospheres – Part 36: Non-electrical equipment for explosive atmospheres.
Basic method and requirements
EN ISO 80079-37:2016
Explosive atmospheres - Part 37: Non-electrical equipment for explosive atmospheres --
Non-electrical type of protection constructional safety ''c'', control of ignition sources ''b'',
liquid immersion ''k''
Documentation Officer:
Jelena Havelkova, Spielberk Office Centre, Holandska 10, Brno, 63900 Czech Republic,
: [phone], : [email protected]
This declaration, based on the requirements of the listed Directives and EN ISO/IEC 17050-1, covers all product
serial numbers from this date on: 2020-11-19
_____________________________________
Andries De Bock – Vice President Engineering
Industrial Vacuum Division
Cologne
__________________________________
Bram Claes – General Manager
Qingdao
Edwards Ltd
Innovation Drive
Burgess Hill
West Sussex
RH15 9TW
UK

This product has been manufactured under a quality management system certified to ISO 9001:2015
Additional Legislation and Compliance Information
EU RoHS Directive: Material Exemption Information
This product is compliant with the following Annex III Exemptions:
•6(b) Lead as an alloying element in aluminium containing up to 0.4% by weight
•6(c) Copper alloy containing up to 4% lead by weight
Article 33 Declaration
This product does contain Candidate List Substances of Very High Concern above 0.1%ww by article as clarified under the
2015 European Court of Justice ruling in case C-106/14.
•Lead (Pb) added to the Candidate List June 2018
As indicated by the applied RoHS exemption(s) above this substance is present in certain aluminium/brass components.
Additional Information
The products listed are also in scope for and comply with the requirements of the following:
2012/19/EU
Directive on waste electrical and electronic equipment (WEEE)
材料成分声明
China Material Content Declaration
有害物质
Hazardous Substances
部件名称
Part name
铅
Lead
(Pb)
汞
Mercury
(Hg)
镉
Cadmium
(Cd)
六价铬
Hexavalent
Chromium
(Cr VI)
多溴联苯
Polybrominated
biphenyls
(PBB)
多溴二苯醚
Polybrominated
diphenyl ethers
(PBDE)
铸铝及铝合金制品
Aluminium alloys
X O O O O O
铜管管件
Brass pipe fitting
X O O O O O
铜接头
Brass connectors
X O O O O O
冷却系统
Cooling system
X O O O O O
O: 表示该有害物质在该部件的所有均质材料中的含量低于 GB/T 26572 标准规定的限量要求。
O: Indicates that the hazardous substance contained in all of the homogeneous materials for this part is below the limit
requirement in GB/T 26572.
X: 表示该有害物质在该部件的至少一种均质材料中的含量超出 GB/T26572 标准规定的限量要求。
X: Indicates that the hazardous substance contained in at least one of the homogeneous materials used for this part is
above the limit requirement of GB/T26572.

Contents
1. Safety and compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Denion of Warnings and Cauons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Safety symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2. Introducon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Scope and denions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Descripon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.2 General construcon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.3 Principle of operaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.4 Hydrokinec drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3 Chemical and ATEX compliant EH pumps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3.1 Flameproof motors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3.2 ATEX direcve (2014/34/EU): Europe only. . . . . . . . . . . . . . . . . . . . . 12
2.3.3 Temperature classicaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3.4 Hydrokinec drive/gearbox purge. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3.5 Aer-cooler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3.6 Normal operaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.7 Abnormal operaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.8 Electrostac charges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.3.9 ATEX cercaon of EH mechanical booster. . . . . . . . . . . . . . . . . . . 16
3. Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.1 Operang and storage condions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2 Crical backing pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3 Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.4 Mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.5 Electrical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.6 Lubricaon data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.7 Hydrokinec drive/gearbox nitrogen supply. . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.8 Cooling water data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.9 Noise and vibraon data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.10 Connecons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.11 Materials of construcon of components exposed to pumped gases. . . . . 26
3.12 Azide compability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.13 Item numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4. Installaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.1 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.2 System requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.3 Unpack and inspect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
11/2020 - ©Edwards Limited
Page 4A30151880_AA

4.4 Fill the pump with oil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.4.1 Hydrokinec drive/gearbox. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.4.2 Sha seal reservoir. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.4.3 Gear cover (all EH1200, EH2600 and EH4200 model pumps only). . 41
4.5 Cooling water connecons (all EH1200, EH2600 and EH4200 model pumps
only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.6 Electrical connecons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.6.1 Electrical supply conguraon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.6.2 Motor connecons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.6.3 Connect the motor thermistors (chemical and ATEX compliant EH
pumps only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.7 Check the direcon of pump rotaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.8 Connect the hydrokinec drive/gearbox purge nitrogen supply (chemical and
ATEX compliant EH pumps only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.9 Connect the pump inlet and outlet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
4.10 External evacuaon of hydrokinec drive/gearbox (oponal). . . . . . . . . . . 47
5. Operaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.1 Operaonal safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.2 Start-up procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.2.1 Pre-start checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.2.2 Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.3 Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6. Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.1 Safety informaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.2 Maintenance plan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.3 Check the oil level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.4 Inspect the pump connecons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.5 Change the pump oil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.6 Lubricate the rear bearing (All EH250FX and EH500FX model pumps only). 54
6.7 Overhaul the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7. Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8. Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9. Service and spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.1 Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.1.1 Return the equipment or components for service . . . . . . . . . . . . . . 58
9.2 Spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11/2020 - ©Edwards Limited
Page 5A30151880_AA

List of Figures
Figure 1: EH250FX and EH500FX pump variants. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 2: EH1200FX, EH2600 and EH4200 pump variants. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 3: EH250FX/EH250IND dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 4: EH500FX/EH500IND dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 5: EH1200FX/EH1200IND dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 6: EH1200C/EH1200T3/T160/T4 dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 7: EH2600FX/EH2600IND dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 8: EH2600C/EH2600T3/EH2600T4 dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 9: EH4200FX/EH4200IND dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 10: EH4200C/EH4200T3/EH4200T4 dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 11: Sight glasses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 12: Example control circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 13: Flange loading limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 14: Lubricate the rear bearing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
11/2020 - ©Edwards Limited
Page 6A30151880_AA

1. Safety and compliance
1.1 Denion of Warnings and Cauons
NOTICE:
For safe operaon from the start, read these instrucons carefully before you install
or commission the equipment and keep them safe for future use.
Read all the safety instrucons in this secon and the rest of this manual carefully
and make sure that you obey these instrucons. The equipment must only be
operated and maintained by trained personnel in the proper condion and as
described in this instrucon manual.
Obey local and state requirements and regulaons. If you have any quesons about
safety, operaon or maintenance of the device, please contact our nearest subsidiary.
Important safety informaon is highlighted as warning and cauon instrucons. Obey
these instrucons.
WARNING:
If you do not obey a warning, there is a risk of injury or death. Dierent symbols are
used according to the type of hazard.
CAUTION:
If you do not obey a cauon, there is a risk of minor injury, damage to equipment,
related equipment or process.
NOTICE:
Informaon about properes or instrucons for an acon which, if ignored, will
cause damage to the pump or the system.
We reserve the right to change the design and the stated data. The illustraons are not
binding.
Keep the instrucons for future use.
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1.2 Safety symbols
The safety symbols on the products shows the areas where care and aenon is
necessary.
The safety symbols that follow are used on the product or in the product
documentaon.
Warning/Cauon
An appropriate safety instrucon must be followed or cauon to a po-
tenal hazard exists.
Warning - Dangerous voltage
Idenes possible hazards from dangerous voltages.
Warning - Flammable material
The material is ammable. If exposed to sources of ignion it can cause
a re.
Warning - Hot surfaces
Idenes a potenal hazard from a hot surface.
Warning - Moving parts present
Idenes parts that move. You must let the parts that turn stop before
you remove the electrical power.
Warning - Risk of explosion
There is a risk of explosion when you do the task.
Warning - Protecve earth (ground)
Earth point for electrical equipment.
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2. Introducon
2.1 Scope and denions
This manual provides installaon, operaon and maintenance instrucons for
EH mechanical booster pumps. The pumps must be used as specied in this manual.
Read this manual before you install and operate the pumps.
▪Safe area EH mechanical booster pumps:
EH250FX, EH250IND EH500FX, EH500IND, EH1200FX, EH1200IND, EH2600FX,
EH2600IND, EH4200FX and EH4200IND
▪Chemical EH mechanical booster pumps:
EH250C, EH500C, EH1200C, EH2600C and EH4200C
▪ATEX compliant EH mechanical booster pumps:
EH250T4, EH500T4...T3, EH1200T4, EH2600T3, EH2600T4, EH4200T3 and
EH4200T4
Where appropriate, the tles EH mechanical booster pump, safe area EH mechanical
booster pump, ATEX compliant EH mechanical booster pumps and chemical EH
mechanical booster pump are abbreviated to the pump, safe area EH pump, ATEX
compliant EH pump and chemical EH pump respecvely in the remainder of this manual.
2.2 Descripon
2.2.1 Overview
The pumps are compact and have high pumping speeds. The pumps must be used with a
suitable backing pump delivering at least 1/10th of volumetric capacity of the booster
pump. The pumps can operate with a maximum connuous inlet pressure of 1000 mbar.
Lower system pressures can be achieved by the use of two or more pumps in series.
On all pumps, the hydrokinec drive/gearbox is connected to the pump outlet by a
pressure equalisaon passageway and forms an integral part of the vacuum system. The
connecng passageway has a lter which removes debris and so prevents contaminaon
of the lubricang oil and bearings. For an even cleaner system, evacuate the end cover/
gear cover by connecng the evacuaon port (refer to Figure: EH250FX and EH500FX
pump variants or Figure: EH1200FX, EH2600 and EH4200 pump variants) to the pump
inlet or to an external vacuum pump.
The hydrocarbon safe area, ATEX compliant and chemical pumps use hydrocarbon oils,
such as Ultragrade 20. Versions of the safe area EH pumps for use with PFPE
(peruoropolyether) oils are also available for vacuum systems in which oxygen or other
reacve or corrosive gases are pumped. The pumps must not be used to pump
peroxides.
All of the EH2600 and EH4200 model pumps have an aer-cooler in the pump outlet, to
reduce the exhaust gas and rotor temperature.
The safe area pumps are safe to handle non-ammable gases and vapours within the
normal operang parameters of the pumps, as dened in this manual.
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The chemical, and ATEX compliant EH pumps, when used with suitable backing pumps,
are designed to pump ammable gases within the T (temperature) classicaon dened
in the pump descripon (see Temperature classicaon on page 14).
In order to comply with temperature classicaon requirements, a chemical, and ATEX
compliant EH pump must be connected to a backing pump that provides at least 1/10th
of the volumetric capacity of the EH Booster.
All the pumps have ISO inlet ange and outlet ange connecons.
Figure 1 EH250FX and EH500FX pump variants
1. Terminal box 2. Sha seal reservoir vented oil ller plug
3. Hydrokinec drive/gearbox oil ller plug 4. Inlet ange
5. External evacuaon point 6. End cover
7. Rotors 8. Stator housing
9. Hydrokinec drive/gearbox oil drain plug
(under the pump)
10. Direcon of rotaon sight glass
11. Oil level sight glass (hydrokinec drive/
gearbox)
12. Oil level sight glass (sha seal reservoir)
1. Terminal box 2. Sha seal reservoir vented oil ller plug
3. Hydrokinec drive/gearbox oil ller plug 4. Inlet ange
5. External evacuaon point 6. End cover
7. Rotors 8. Stator housing
9. Hydrokinec drive/gearbox oil drain plug
(under the pump)
10. Direcon of rotaon sight glass
11. Oil level sight glass (hydrokinec drive/
gearbox)
12. Oil level sight glass (sha seal reservoir)
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Figure 2 EH1200FX, EH2600 and EH4200 pump variants
A. All EH2600 and EH4200 pumps B. All EH1200 pumpsA. All EH2600 and EH4200 pumps B. All EH1200 pumps
1. Terminal box 2. Sha seal reservoir vented oil ller plug
3. Cooling water connecon 4. Hydrokinec drive/gearbox oil ller
plug*
5. Inlet ange 6. External evacuaon point
7. Gear cover oil ller plug 8. Cooling water connecon
9. Oil level sight glass (gear cover) 10. Gear cover oil drain plug (under the
pump)
11. Rotors 12. Stator housing
13. Hydrokinec drive/gearbox oil drain plug
(under the pump)
14. Direcon of rotaon sight glass†
15. Oil level sight glass (hydrokinec drive/
gearbox)
16. Oil level sight glass (sha seal reservoir) 17. Motor fan cover
1. Terminal box 2. Sha seal reservoir vented oil ller plug
3. Cooling water connecon 4. Hydrokinec drive/gearbox oil ller
plug*
5. Inlet ange 6. External evacuaon point
7. Gear cover oil ller plug 8. Cooling water connecon
9. Oil level sight glass (gear cover) 10. Gear cover oil drain plug (under the
pump)
11. Rotors 12. Stator housing
13. Hydrokinec drive/gearbox oil drain plug
(under the pump)
14. Direcon of rotaon sight glass†
15. Oil level sight glass (hydrokinec drive/
gearbox)
16. Oil level sight glass (sha seal reservoir) 17. Motor fan cover
* Safe area EH pumps only. On the chemical, and ATEX compliant EH pumps, this is a
combined hydrokinec drive/gearbox oil ller plug and purge connector.
† EH1200 pumps only.
2.2.2 General construcon
The pumps are posive displacement roots vacuum pumps. The pump mechanism is
driven by a three-phase electric motor through a hydrokinec drive (refer to
Hydrokinec drive on page 12).
The safe area pumps are all installed with safe area motors. The chemical, and ATEX
compliant EH pumps are all installed with ameproof motors (see Flameproof motors on
page 12). All of the motors are air cooled.
The pump shas and rotors are made of cast SG iron. The internal and external sha
seals are made of polytetrauoroethylene (PTFE) or uoroelastomer.
The pump bearings, gears and seals are lubricated by oil fed from reservoirs in the
hydrokinec drive/gearbox. A series of seals stops the oil from reaching the vacuum side
of the pump. The hydrokinec drive/gearbox is evacuated. All pumps have ISO inlet
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ange and outlet ange connecons. Oil ller, oil drainage and external evacuaon
connecons are provided on the hydrokinec drive/gearbox.
The ming gears on all of the EH1200, EH2600 and EH4200 model pumps are lubricated
by oil inside the gear cover. An oil ller connecon is provided. The oil level can be
inspected through a sight glass installed to the gear cover.
2.2.3 Principle of operaon
The pump is shown in Figure: EH250FX and EH500FX pump variants or Figure:
EH1200FX, EH2600 and EH4200 pump variants. The motor sha drives one of the rotors
through the hydrokinec drive. The 1:1 gears inside the hydrokinec drive/gearbox drive
the second rotor in the opposite direcon inside the stator housing. A small, accurately
gauged clearance is maintained between the rotors and between each rotor and the
stator wall. This clearance allows the pump to operate at high speed without mechanical
wear and without the need for lubricaon inside the swept volume.
2.2.4 Hydrokinec drive
The hydrokinec drive consists of a uid coupling which connects the electric motor
sha to the rotor. This system is congured so that when the gas load is high, the
rotaonal speed of the rotors is reduced. As the gas load decreases, the rotors
accelerate to full speed. This allows connuous operaon of the pump over the vacuum
range without the risk of overloading the motor and removes the need for bypass valves
and associated pipelines.
The uid coupling is viscosity sensive. The two versions of the pump (for hydrocarbon
and PFPE oils) have uid coupling drives which are specically designed for the type of
oil used in the pump.
2.3 Chemical and ATEX compliant EH pumps
2.3.1 Flameproof motors
For all EH250C, EH250T4, EH500C, EH500T4...T3, EH1200C, EH1200T4, EH2600C,
EH2600T3, EH2600T4, EH4200C, EH4200T3 and EH4200T4:
▪Pumps suitable for 50 Hz operaon are installed with a ameproof motor
approved to Ex db, Ex db IIB, Temperature Class T4.
▪Pumps suitable for 60 Hz operaon are installed with a ameproof motor
approved to CSA, Division 1 area, Gas Class I Group C & D, and Dust Class II Group F
& G, Temperature Class T3C.
▪If the pump is operated in a IIC external environment, t a IIC motor to the EH
mechanical booster.
2.3.2 ATEX direcve (2014/34/EU): Europe only
ATEX compliant EH pumps with an internal T3 or T4 temperature classicaon (refer to
Temperature classicaon on page 14) may be used in an ATEX-compliant vacuum
system only if the pumps are congured and used in accordance with the requirements
of this manual. For ATEX compliant systems using an EH booster pump in combinaon
with an EDP dry pump, the requirements of the ATEX Instrucon Manual (see
'Associated publicaons') must also be met.
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Note:
An 'X' sux to the EH booster ATEX classicaon indicates that there are special
condions for safe use of the booster.
ATEX compliant systems supplied by us will be cered in accordance with the ATEX
direcve, and will be idened by an ATEX system rang label.
If ng an ATEX compliant EH pump with a T3 or T4 temperature classicaon into an
ATEX compliant vacuum system, the pump must be installed and operated in accordance
with the requirements of this instrucon manual. Please pay special aenon to
Temperature classicaon on page 14 about the temperature classicaon of the pump,
Hydrokinec drive/gearbox purge on page 14 about the hydrokinec gearbox purge,
about the requirements of construconal safety, Abnormal operaon abnormal use,
about the possible combinaon of EH mechanical booster with our backing pumps and
Cooling water data about the minimum cooling water ow. A safety risk assessment
must also be carried out as part of the system cercaon in order to make sure that
the system is safe. If using a non-Edwards backing pump in combinaon with the EH
mechanical booster, please make sure that the volumetric rao of the backing pump is
at least 1/10th of the volumetric capacity of the EH booster. If necessary, contact us for
cercaon advice.
Note:
The EH500T4 must be used with a primary pump with a minimum 160 m3h-1.
ATEX compliant EH pumps with an internal T3 or T4 temperature classicaon are
suitable for operaon in ATEX compliant systems rated as follows:
The notaons used in these rangs are as follows:
Equipment to be used in a potenally explosive atmosphere
II Equipment group II - non mining equipment
int or ext Internal or External of the pump
1,2 Equipment category 1, Equipment category 2
G Explosive atmosphere caused by gases, vapours or mists
Ex h Explosion protecon method
IIB or IIC Gas Groups IIB or IIC
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T3 or T4 Temperature Rang, T3 (200 °C) or T4 (135 °C)
T4…T3 Temperature Rang,T4 (135 °C) and T3 (200 °C), T4 has pump
use restricons.
Ga, Gb EPL (Equipment Protecon Level)
Refer to Technical data on page 18 of this manual for the necessary pump operang
condions. If the booster is part of an the vacuum system, refer to the ATEX Instrucon
Manual and to the system instrucon manual for specic details of the system.
2.3.3 Temperature classicaon
The temperature classicaons applied to the chemical and ATEX compliant EH pumps
relate to the auto-ignion temperature of ammable materials that can be pumped:
▪The EH500T3, EH2600T3, EH4200T3, ATEX compliant and chemical EH pumps that
have a T3 classicaon are suitable for pumping ammable materials that have an
auto-ignion temperature greater than 200 °C.
▪The EH250T4, EH500T4, EH1200T4, EH2600T4 and EH4200T4 ATEX compliant
pumps that have a T4 classicaon are suitable for pumping ammable materials
that have an auto-ignion temperature greater than 135 °C.
Refer to Technical data on page 18 of this manual for the necessary pump operang
condions, to the ATEX Instrucon Manual, and to the system manual for specic details
of the system in which the pump is installed.
2.3.4 Hydrokinec drive/gearbox purge
CAUTION: EH ATEX COMPLIANT BOOSTER
Risk of damage to equipment. When using the EH ATEX compliant booster in either
our ATEX compliant system or in a customer cered ATEX vacuum pumping system,
make sure that the gearbox purge is connected to the booster and the nitrogen
supply is guaranteed. Please refer to Hydrokinec drive/gearbox nitrogen supply on
page 24 for operang condions.
A pipeline connector is provided on the oil ller of the hydrokinec drive/gearbox of all
of the chemical and ATEX compliant EH pumps. Connecng a suitable purge gas supply
to this connector will purge the hydrokinec drive with nitrogen at posive pressure.
This will purge the sha seals and prevent the entry of corrosive or toxic vapours into
the hydrokinec drive and gear cover.
A xed restrictor in the connector make sure that the correct amount of nitrogen is
allowed to ow into the hydrokinec drive/gearbox.
2.3.5 Aer-cooler
On the EH2600C, EH2600T3, EH2600T4, EH4200C, EH4200T3, EH4200T4 chemical and
ATEX compliant EH pumps, the nickel-plated aer-cooler is resistant to corrosive vapours
which may condense on it during pump operaon (depending on the applicaon).
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2.3.6 Normal operaon
WARNING: PROCESS DEPOSITS
Risk of injury and damage to equipment. The ATEX compliant EH pumps rely on the
principle of construconal safety to pump ammable gases and vapours safely.
Process deposits (which could form due to condensaon of process vapours) do not
normally occur in booster pumps. However, to conform with construconal safety
requirements, it is the customer's responsibility to make sure that process deposits
do not occur in the ATEX compliant EH pump.
WARNING: PARTICLE INGRESS
The ATEX compliant EH pump must be protected from the ingress of parcles that
could cause an ignion of ammable gas or vapour in the pump. If parcles could
enter the ATEX compliant EH pump during system commissioning, t a suitable inlet
lter or screen that may be removed before process operaon (refer to Connect the
pump inlet and outlet). The EH4200 must always have an inlet screen installed, as the
pump casing can fracture. A suitable inlet screen is shown in Table: Spares.
The ATEX compliant EH pumps rely on the pump's construconal safety for the safe
pumping of ammable materials. In normal operaon, as dened by this manual, the
ATEX compliant EH pumps are safe for the pumping of ammable materials where there
is no risk that the build-up of process deposits could reduce the operang clearances of
the pump mechanism, and so cause a potenal ignion hazard.
Where there is no such risk, the ATEX compliant EH pumps can be used to pump
ammable materials from gas group IIA, IIB and IIC within the normal parameter dened
in this manual.
2.3.7 Abnormal operaon
Misuse of the chemical and ATEX compliant EH pump as described below is strictly
prohibited:
▪Pumping gases with temperatures greater than the system temperature
classicaon (see Temperature classicaon on page 14).
▪ Pumping hydrocarbon oxides.
▪Pumping pyrophoric gases.
▪Pumping gases that tend to self-decompose, or that are chemically unstable.
▪Pumping peroxides or oxygen enriched atmospheres with ATEX cered pumps.
For non-ATEX applicaons PFPE versions of the pumps can be oered for oxygen
enriched atmospheres and peroxides.
▪Use of the chemical and ATEX compliant EH pump with materials which have auto-
ignion temperatures below the dened temperature rang of the chemical EH
pump.
▪Pumping of, or use of the ATEX compliant EH pump in the presence of, explosive
dust atmospheres.
▪Use of the ATEX compliant EH pump in ambient condions other than those
specied in Operang and storage condions on page 18.
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2.3.8 Electrostac charges
Pure gas does not create electrostac charges. There is a danger of electrostac charges
when the gas pumped contains droplets or parcles.
Always make sure that the pump is earthed so there is no danger of igning ammable
gases due to electrostac discharges.
2.3.9 ATEX cercaon of EH mechanical booster
The EH booster is cered under the ATEX direcve and will bear the following marking:
The category of the EH booster will depend on the level of systemisaon. Refer to
Category 2 on page 16 for more informaon. If in doubt please contact us. If the EH
mechanical booster was purchased as part of our ATEX system, all the systemisaon
requirements to full the system cercaon will have been implemented.
Category 2
The EH Category 2 boosters rely on construconal safety. Refer to Aer-cooler for more
informaon.
Safety crical instrumentaon for Category 2 and required SIL.
▪ Cooling water ow switch: In order to guarantee the temperature classicaon of
the EH booster, install a cooling water ow switch to the cooling water outlet line
of the EH1200, EH2600 and EH4200 booster. Refer to Technical data on page 18 for
cooling water requirements. The ow switch and the associated control system
must be rated SIL1 and have a HFT = 0 in accordance with EN50495.
Category 1
EH Category 1 mechanical boosters (internal cercaon) rely on construconal safety
and control of ignion sources.
A pressure sensor/switch installed to the exhaust line of the EH booster must make sure
that the booster is switched o when the exhaust pressure rises above 100 mbar. The
booster is only allowed to operate when pressures inside the booster are below
100 mbar. Pump down can be done through the booster.
Safety crical instrumentaon for Category 1 and required SIL.
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In addion to the cooling water switch for Category 2 (Refer to Category 2 on page 16),
an exhaust pressure sensor/switch and a nitrogen pressure or ow switch on the
gearbox purge line is required to achieve Category 1.
▪ Exhaust pressure sensor/switch: To make sure that the EH mechanical booster only
operates when the pressure inside the booster is below 100 mbar. A sensor or
switch is installed to the exhaust of the booster. The output from this sensor or
switch must be connected to safety interlock circuit that meets the requirement of
b1 in accordance with EN80079-37 and stops the booster if the maximum pressure
is exceeded.
▪Nitrogen ow or pressure switch on gearbox purge line: The correct Nitrogen ow
or pressure to the gearbox is required for construconal safety to prevent process
gases contaminang the gearbox and/or the bearings. The output from this ow or
pressure switch must be connected to a safety interlock circuit that meets the
requirements of b1 in accordance with EN80079-37. If the Nitrogen supply falls
below the required rate for more than 2 hours the booster will stop. The ow
switch must be mechanically aached to the body of the pump to avoid leakage.
Please refer to Hydrokinec drive/gearbox nitrogen supply on page 24 for the
required nitrogen supply pressure and ow.
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