Edwards nES Series User manual

Single Stage Rotary Vane Pumps
nES Series
INSTRUCTION MANUAL
A35104880_B Original instrucons
edwardsvacuum.com
PUMP MODEL PRODUCT ITEM NUMBERS PUMP MODEL PRODUCT ITEM
NUMBERS
nES40 A3510xxxx nES300 A356xxxxx
nES65 A3530xxxx nES470 A3570xxxx
nES100 A3540xxxx nES570 A3580xxxx
nES200 A3550xxxx nES630/nES750 A3590xxxx

Copyright noce
©Edwards Limited 2020. All rights reserved.
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.

Declaration of Conformity
This product has been manufactured under a quality management system certified to ISO 9001:2015.
This declaration is based on the requirements of EN ISO 17050-1 and the relevant directives.
P200-10-195-A
Edwards Ltd,
Innovation Drive,
Burgess Hill,
West Sussex,
RH15 9TW, UK
The following product:
Product designation : nES, Single Stage Rotary Vane Pumps
Type designation: 40 / 65 / 100 / 200 / 300 / 470 / 570 / 630 / 750
Model number: nES40 / nES65/ nES100/ nES200/ nES300 / nES470/ nES570/ nES630 / nES750 and their variants
conform to the relevant requirements of European CE legislation:
2006/42/EC
Machinery directive
2014/35/EU The safety objectives of the Low Voltage Directive 2014/35/EU were
complied with in accordance with Appendix 1 No. 1.5.1 of Machinery
Directive 2006/42/EC.
2014/30/EU
Electromagnetic compatibility (EMC) directive
2011/65/EU
And 2015/863/EU
Restriction of certain hazardous substances (RoHS) Directive
Based on the relevant requirements of harmonised standards:
EN 1012-2:1996+A1:2009 Compressors and vacuum pumps — Safety requirements — Part 2: Vacuum
pumps
EN 60204-1:2006/A1:2009 Safety of machinery — Electrical equipment of machines — Part 1: General
requirements
EN 61000-6-2:2005/AC:2005 Electromagnetic compatibility (EMC) - Part 6-2: Generic standards - Immunity for
industrial environments
EN 61000-6-4:2007/A1:2011 Electromagnetic compatibility (EMC) - Part 6-4: Generic standards - Emission
standard for industrial environments
This covers all product serial numbers from the date of this declaration onwards
Cologne, July 9th, 2018 Valence, July 9th, 2018
___________________________ __________________________
Andries Desiron Joseph Schott
VP Engineering General Manager Product Company Valence
Industrial Vacuum Division

P200-10-204
Issue A
Material Declaration
In accordance with the requirements of the Chinese regulatory requirement on the Management Methods for the
Restriction of the Use of Hazardous Substances in Electrical and Electronic Products Order No. 32 (also known as
‘China RoHS2’) and SJ/T 11364 Marking for the Restricted Use of Hazardous Substances in Electronic and Electrical
Products:
Product Product Labels Meaning
nES Single Stage Pumps - nES40,
nES65, nES100, nES200, nES300,
nES470, nES570, nES630, nES750
This product contains hazardous substances in at
least one of the homogeneous materials used
which are above the limit requirement in GB/T
26572 as detailed in the declaration table below.
These parts can safely be used for the
environmental protection use period as
indicated.
材料成分声明
Materials Content Declaration
部件名称
Part name
有害物质
Hazardous Substances
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
XOOOOO
钢合金制品
Steel alloys
XOOOOO
铜管管件
Brass pipe fitting
X O O O O O
铜接头
Brass connectors
XOOOOO
铜衬套轴承
Brass bush bearing
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.
NOTE: These products are EU RoHS compliant, the following Exemptions apply:
6(a) Lead as an alloying element in steel for machining purposes and in galvanised steel containing up to 0.35% by
weight
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

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Contents
1. Safety and compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1 Denion of Warnings and Cauons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Safety symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 General precauons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Safety precauons during installaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.5 Safety precauons during operaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.6 Safety precauons during maintenance or repair. . . . . . . . . . . . . . . . . . . . . . 10
2. Descripon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1 General descripon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2 Airow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3 Oil ow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3. Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 References condions and limitaons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Pump data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2.1 Pumping performance curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3 Motor data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4 Materials of construcon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4. Installaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1 Dimension drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2 Installaon guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.3 Electrical connecons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.4 Pictographs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5. Operaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.1 Inial start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.2 Start the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.3 During operaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.4 Stop the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.5 Taking out of operaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6. Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.1 Prevenve maintenance schedule. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.2 Oil specicaons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.3 Service kits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7. Adjustments and servicing procedures. . . . . . . . . . . . . . . . . . . . . . . . 38
7.1 Drive motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
07/2020 - Page 3

7.2 Exhaust lter replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.3 Oil and oil lter change. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7.3.1 Oil change procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7.3.2 Oil type change. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7.4 Cleaning radiator, motor fan guard and pump. . . . . . . . . . . . . . . . . . . . . . . . . 41
7.5 Replacing V - belts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.6 V-belt tensioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.6.1 How to use the v-belt tension meter. . . . . . . . . . . . . . . . . . . . . . . . . . 41
8. Fault nding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
9. Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
10. Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.1 Recycle the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.2 Recycle oil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
11. Return the equipment or components for service . . . . . . . . . . . . . . 50
Page 4 - 07/2020

List of Figures
Figure 1: nES40 Pumping performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 2: nES65 Pumping performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 3: nES100 Pumping performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 4: nES200 Pumping performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 5: nES300 Pumping performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 6: nES300S Pumping performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 7: nES470 Pumping performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 8: nES570 Pumping performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 9: nES630 Pumping performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 10: nES750 Pumping performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 11: nES40 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 12: nES65 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 13: nES100 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 14: nES200 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 15: nES300 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 16: nES300S Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 17: nES470 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 18: nES570 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 19: nES630 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 20: nES750 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 21: Electrical connecons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 22: Pictographs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 23: Belt tensioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 24: Components for recycling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
07/2020 - Page 5

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.
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.
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.
Page 6 - 07/2020
A35104880_B - Safety and compliance

Warning/Cauon
An appropriate safety instrucon must be followed or cauon to a
potenal hazard exists.
Warning - Dangerous voltage
Idenes possible hazards from dangerous voltages.
Warning - Hot surfaces
Idenes a potenal hazard from a hot surface.
Warning - Use protecve equipment
Use appropriate protecve equipment for the task.
Warning - Risk of explosion
There is a risk of explosion when you do the task.
Warning - Environmental hazard
Idenes possible hazards to the environment.
Warning - Flammable material
The material is ammable. If exposed to sources of ignion it can cause
a re.
Warning - Corrosive substances
The substance is corrosive.
Warning - Toxic material
The material is toxic.
1.3 General precauons
CAUTION: AUTOMATIC RESTART AFTER VOLTAGE FAILURE
Risk of damage to equipment. If the machine is equipped with an automac restart
aer voltage failure funcon and if this funcon is acve, be aware that the machine
will restart automacally when the power is restored if it was running when the
power was interrupted.
Note:
All responsibility for any damage or injury resulng from neglecng these precauons, or
non
‑ observance of the normal cauon and care required for installaon, operaon,
maintenance and repair, even if not expressly stated, will be disclaimed by the
manufacturer.
Some precauons are general and cover several machine types and equipment, hence
some statements may not apply to your machine.
These precauons apply to machinery processing or consuming air or inert gas.
Processing of any other gas requires addional safety precauons typical to the
applicaon which are not included in this manual.
07/2020 - Page 7
A35104880_B - Safety and compliance

1. The operator must follow safe working pracces and observe all related work
safety requirements and regulaons.
2. If any of the following statements does not comply with the applicable legislaon,
the stricter of the two shall apply.
3. Installaon, operaon, maintenance and repair work must only be performed by
authorised, trained and specialised personnel.
4. The vacuum pump is designed for handling atmospheric air only. No other gases,
vapours or fumes should be exposed to the vacuum pump inlet or processed by
the vacuum pump.
5. Before any maintenance, repair work, adjustment or any other non-roune checks,
stop the vacuum pump, press the emergency stop buon, switch o the voltage
and make sure that the pump system is at atmospheric pressure level. Also, the
power isolang switch must be opened and locked.
6. Avoid contact with pump inlet during operaon.
7. The owner is responsible for maintaining the unit in a safe operang condion.
Parts and accessories shall be replaced if unsuitable for safe operaon.
8. Do not walk or stand on the unit or its components.
1.4 Safety precauons during installaon
1. The machine must only be lied using suitable equipment by the applicable safety
regulaons. Loose or pivong parts must be securely fastened before liing. It is
strictly forbidden to dwell or stay in the risk zone under a lied load. Liing
acceleraon and deceleraon must be kept within safe limits. Wear a safety
helmet when working in the area of overhead or liing equipment.
2. The unit is designed for indoor use. If the unit is installed outdoors, special
precauons must be taken. Consult the supplier.
3. Place the machine where the ambient air is as cool and clean as possible. If
necessary, install a sucon duct. Never obstruct the air inlet. Water handling
capacity is limited.
4. Any blanking anges, plugs, caps and desiccant bags must be removed before
connecng the pipes.
5. Air hoses must be of correct size and suitable for the working pressure. Never use
frayed, damaged or worn hoses. Distribuon pipes and connecons must be of the
correct size and suitable for the working pressure.
6. The aspirated air must be free of ammable fumes, vapours and parcles, for
example, paint solvents that can lead to internal re or explosion.
7. Arrange the air inlet to prevent contact with loose clothing.
8. No external force may be exerted on the inlet and outlet connecons. The
connected pipes must be free of strain.
9. If remote control is installed, the machine must bear a clear sign stang:
DANGER: This machine is remotely controlled and may start without warning.
The operator must make sure that the machine is stopped, depressurised and that
the electrical isolang switch is open, locked and labelled with a temporary
warning before any maintenance or repair. As a further safeguard, persons
switching remotely controlled machines shall take adequate precauons to make
Page 8 - 07/2020
A35104880_B - Safety and compliance

sure that there is no one checking or working on the machine. A suitable noce
must be axed to the start equipment.
10. Air-cooled machines must be installed to make sure adequate ow of cooling air is
available and that the exhausted air does not recirculate to the inlet.
11. The electrical connecons must correspond to the applicable codes. The machines
must be earthed and protected against short circuits by fuses in all phases. A
lockable power isolang switch must be installed near the pump.
12. On machines with an automac start/stop system or if the automac restart
funcon aer voltage failure is acvated, a sign stang "This machine may start
without warning" must be axed near the instrument panel.
13. In mulple vacuum pump systems, manual valves must be installed to isolate each
pump. Non-return valves (check valves) must not be relied upon for isolang
mulple systems.
14. Never remove or tamper with the safety devices, guards or insulaon ed on the
machine.
15. Piping or other parts with a temperature over 70 °C (158 °F) and which may be
accidentally touched by personnel in normal operaon must be guarded or
insulated. Another high‑temperature piping must be marked.
16. For water-cooled machines, the cooling water system installed outside the
machine must be protected by a safety device with set pressure according to the
maximum cooling water inlet pressure.
17. If the ground is not level or can be subject to variable inclinaon, consult the
manufacturer.
18. Pump outlet air contains traces of oil mist. Ensure compability with the working
environment.
19. Whenever air containing hazardous substances enters the pump (that is, biological
or microbiological agents), use abatement systems placed upstream of the vacuum
pump.
20. Any vacuum pump placed in an applicaon with inlet gas stream temperatures
above the published maximum temperature should be approved by us before
start-up.
Note:
Refer to Safety precauons during operaon on page 12 Safety precauons during
operaon on page 9 and Safety precauons during maintenance or repair on
page 13 Safety precauons during maintenance or repair on page 10.
1.5 Safety precauons during operaon
1. Never touch any piping or components of the vacuum pump during operaon.
2. Use only the correct type and size of hose end ngs and connecons. Make sure
that a hose is fully depressurised before disconnecng it.
3. Persons switching on remotely controlled machines shall take adequate
precauons to ensure that there is no one checking or working on the machine. To
this end, a suitable noce shall be axed to the remote start equipment.
4. Never operate the machine when there is a possibility of taking inammable or
toxic fumes, vapours or parcles.
07/2020 - Page 9
A35104880_B - Safety and compliance

5. Never operate the machine below or above its limit rangs.
6. Keep all bodywork doors shut during operaon. The doors may be opened for
short periods only, for example, to do roune checks. Wear ear protectors when
opening a door.
On vacuum pumps without bodywork, wear ear protecon in the vicinity of the
machine.
7. People staying in environments or rooms where the sound pressure level reaches
or exceeds 80 dB(A) must wear ear protectors.
8. Periodically check that:
▪All guards are in place and securely fastened.
▪All hoses and pipes inside the machine are in good condion, secure and not
rubbing.
▪There are no leaks.
▪All fasteners are ght.
▪All electrical leads are secure and in good order.
▪Safety valves and other pressure relief devices are not obstructed by dirt or
paint.
▪ Air outlet valve and air net, that is pipes, couplings, manifolds, valves, hoses,
and so forth, are in good repair, free of wear or abuse.
▪Electrical cabinet air cooling lters are not clogged.
9. If warm cooling air from vacuum pumps is used in air heang systems, for example,
to warm up a workroom, take precauons against air polluon and possible
contaminaon of the breathing air.
10. On water-cooled vacuum pumps using open circuit cooling towers, protecve
measures must be taken to avoid the growth of harmful bacteria such as Legionella
pneumophila bacteria.
11. Do not remove any of, or tamper with, the sound-damping material.
12. Never remove or tamper with the safety devices, guards or insulaons ed on
the machine.
13. The oil separator tank can be slightly pressurised. Do not open and do not leave oil
ller or drain plugs open during operaon.
14. Do not use the pump as a compressor.
15. Never run the pump without the air inlet lter mounted.
Note:
Refer to Safety precauons during installaon on page 10 Safety precauons
during installaon on page 8 and Safety precauons during maintenance or repair
on page 13 Safety precauons during maintenance or repair on page 10.
1.6 Safety precauons during maintenance or repair
1. Always use the correct safety equipment (such as safety glasses, gloves, safety
shoes, and so forth).
2. Use only the correct tools for maintenance and repair work.
3. Use only genuine spare parts.
4. All maintenance work shall be performed aer the machine has cooled down.
Page 10 - 07/2020
A35104880_B - Safety and compliance

5. A warning sign bearing a legend such as "Work in progress; do not start" shall be
aached to the starng equipment.
6. Persons switching on remotely controlled machines shall take adequate
precauons to ensure that there is no one checking or working on the machine. To
this end, a suitable noce shall be axed to the remote start equipment.
7. Before removing any component, eecvely isolate the machine from all sources
of under and/or overpressure and make sure that the pump system is at
atmospheric pressure level.
8. Never use ammable solvents or carbon tetrachloride for cleaning parts. Take
safety precauons against toxic vapours of cleaning liquids.
9. Scrupulously observe cleanliness during maintenance and repair. Keep dirt away by
covering the parts and exposed openings with a clean cloth, paper or tape.
10. Never weld or perform any operaon involving heat near the oil system. Oil tanks
must be completely purged, for example, by steam cleaning, before carrying out
such operaons. Never weld on, or in any way modify, pressure vessels.
11. Whenever there is an indicaon or any suspicion that an internal part of a machine
is overheated, the machine shall be stopped but no inspecon covers shall be
opened before sucient cooling me has elapsed. This will avoid the risk of
spontaneous ignion of the oil vapour when air is admied.
12. Never use a light source with an open ame for inspecng the interior of a
machine, pressure vessel, and so forth.
13. Make sure that no tools, loose parts or rags are le in or on the machine.
14. All regulang and safety devices shall be maintained with due care to ensure that
they funcon properly. They may not be put out of acon.
15. Before clearing the machine for use aer maintenance or overhaul, check that
operang pressures, temperatures and me sengs are correct. Check that all
control and shut-down devices are ed and that they funcon correctly. If
removed, check that the coupling guard of the vacuum pump drive sha has been
reinstalled.
16. Every me the separator element is renewed, examine the discharge and the
inside of the oil separator vessel for carbon deposits. If there are excessive
deposits, remove it.
17. Protect the motor, air lter, electrical and regulang components, and so forth, to
prevent moisture from entering them, for example, when steam cleaning.
18. Make sure that all sound damping material and vibraon dampers, for example,
damping material on the bodywork and in the air inlet and outlet systems of the
vacuum pump are in good condion. If damaged, replace it with genuine material
from the manufacturer to prevent the sound pressure level from increasing.
19. Never use causc solvents which can damage materials of the air net, for example,
polycarbonate bowls.
20. Faults or wearing of seals may cause oil lubricant leaks. Avoid dispersion in soil and
polluon of other materials.
Note:
Refer to Safety precauons during installaon on page 10 Safety precauons
during installaon on page 8 and Safety precauons during operaon on page 12
Safety precauons during operaon on page 9.
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2. Descripon
2.1 General descripon
The nES40 to nES750 are single-stage, oil-sealed and air or water-cooled rotary vane
vacuum pumps driven by an electric motor. nES470, nES570, nES630 and nES750 are belt
driven.
The pumps have been specically designed to work with clean air, inert gas or small
amounts of water vapour. The ambient temperature must be between 12 °C and 40 °C.
Note:
Lower temperatures are possible with reduced viscosity oil. This temperature range is
dened by the standards body Pneurop for performance conformity tesng, but the
ambient temperature given is most crical at motor start-up..
2.2 Airow
▪Air drawn through the inlet protecon screen and the inlet non-return valve is
displaced by the vacuum pump element towards the air end exhaust valve. This
valve ejects a mixture of air and oil into the exhaust lter element. Aer passing
the exhaust lter element, clean air (condioned to a few parts per million) is
discharged through the outlet.
▪The vacuum pump is driven by an electric motor.
2.3 Oil ow
Oil injected into the pump chamber serves to seal, lubricate and cool the pump. The oil
mixed with the compressed gas is coarsely trapped in the boom part of the oil casing.
Then ne ltering occurs in the integrated exhaust lter elements. The proporon of oil
in the exhaust gas is reduced below the visibility threshold (over 99% entrapment rate).
The oil trapped in the exhaust lters is returned to the generator by the oil return line.
To prevent gas ow at atmospheric pressure from the oil reservoir into the inlet port, the
oil return line is controlled by a oat valve. The oil cycle is maintained by the pressure
dierence exisng between the oil casing (pressure above atmospheric pressure) and
the inlet port (pressure below atmospheric pressure).
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A35104880_B - Descripon

3. Technical data
3.1 References condions and limitaons
Table 1 References condions and limitaons
Parameter Unit nES
40
nES
65
nES
100
nES
200
nES
300
nES
300S
nES
470
nES
570
nES
630
nES
750
Ambient
barometric
pressure
mbar(g) 1013
Torr
(mmHg) 760
Air inlet
temperature
°C 20
°F 68
Motor speed
50 Hz rpm 1500
Motor speed
60 Hz rpm 1800
Mineral oil
viscosity ISO VG68
Maximum inlet
pressure for
connuous
operaon
mbar(g) 1013
Torr
(mmHg) 760
Maximum
ambient
temperature
°C 40
°F 104
Minimum
ambient
temperature
°C 12
°F 53.6
Maximum gas
inlet temperature
°C 40
°F 104
Minimum gas
inlet temperature
°C 12
°F 53.6
Maximum
exhaust back
pressure
mbar(g) 150
psi(g) 2.2
Minimum exhaust
back pressure
mbar(g) -15
psi(g) -0.22
Maximum inlet
pressure for
water vapour
with standard gas
ballast
mbar(g) 30 10 15 40
torr
(mmHg) 22.5 7.5 11 30
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Note:
Lower temperatures are possible with reduced viscosity oil. This temperature range is
dened by Pneurop for performance conformity tesng, but 8 °C is the crical point from
the motor starng viewpoint.
3.2 Pump data
Table 2
Pump data
Parameter Unit nES
40
nES
65
nES
100
nES
200
nES
300
nES
300S
nES
470
nES
570
nES
630
nES
750
Maximum
displacement
(50 Hz)
m3h-1 44.0 59.0 98.0 180 280 330 470 570 700 840
cfm 25.9 34.8 57.4 106 165 194 277 366 412 494
Maximum
displacement
(60 Hz)
m3h-1 53.0 71.0 117 230 340 385 570 - 840 -
cfm 31.2 41.8 68.9 130 200 227 366 - 494 -
Pumping speed
(50 Hz)
m3h-1 38.5 54.0 87.5 170 240 284 400 470 640 755
cfm 22.7 31.8 51.5 100 141 167 236 277 377 444
Pumping speed
(60 Hz)
m3h-1 47.0 64.0 105 200 290 330 470 - 755 -
cfm 27.7 37.7 61.8 118 171 194 277 - 444 -
Motor rated
power (50 Hz) kW 1.3 1.8 3 4.5 5.5 6 11 11 18.5 18.5
Motor rated
power (60 Hz) kW/hp 1.3/2 1.8/3 3.6/5 5.5/
7.5
6.6/
10 7.2/10 13.2/ 15 -18.5/ 25 -
Dimensions
(L x W x H)
(Approximate)
mm
540 x
284 x
303
586 x
320 x
314
721 x
400 x
319
1002 x
535 x
415
1115x
555 x
450
1117 x
565 x
450
1305 x
863 x
779
1305 x
863 x
779
1563 x
909 x
740
1563 x
909 x
740
Maximum water
vapour pumping
rate (50 Hz)
Kgh-1 0.76 1.0 1.60 3.4 1.3 5.0 7.5 17 24
Ibh-1 0.80 1.1 1.69 3.6 1.4 5.3 8.0 18 25
Maximum water
vapour pumping
rate (60 Hz)
Kgh-1 0.90 1.25 1.70 5.4 1.8 7.5 - 24 -
Ibh-1 0.95 1.32 1.80 5.7 1.9 8.0 - 25 -
Weight
(Approximate)
Kg 67 86 104 142 244 480 550 760 760
Ib 148 190 230 313 539 1059 1214 1678 1678
Noise level
(50 Hz) dB(A) 58 60 61 69 72 72 75 72 75
Noise level
(60 Hz) dB(A) 60 64 64 73 76 75 - 75 -
Oil rell capacity litre 1 2 2 5-8 8.5 - 11.5 20 20 20 -
23
20 -
23
Inlet connecon ISO-F / G ISO40 / G1 ¼ ISO63 / G2 ISO63 / G3 ISO100
Outlet connecon ISO-F / G ISO40 / G1 ¼ ISO63 / G2 ISO63 / G3 ISO100
Page 14 - 07/2020
A35104880_B - Technical data

Parameter Unit nES
40
nES
65
nES
100
nES
200
nES
300
nES
300S
nES
470
nES
570
nES
630
nES
750
Ulmate vacuum
without gas
ballast
mbar 0.5 0.08
torr 0.4 0.06
Ulmate vacuum
without gas
ballast
mbar 1.5 0.7
torr 1.1 0.5
Maximum
permied outlet
pressure
bar(a) 1.15
Motor protecon
rang IP55
Recommended oil Ultragrade Performance 70
3.2.1 Pumping performance curves
Figure 1 nES40 Pumping performance curve
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A35104880_B - Technical data

Figure 2 nES65 Pumping performance curve
Figure 3 nES100 Pumping performance curve
Page 16 - 07/2020
A35104880_B - Technical data