Edwards RV3 User manual

A652–01–880
Issue S Original
Instruction Manual
RV3, RV5, RV8 and RV12 Rotary Vane Pumps
A 65X-YY-ZZZ
Pump Type Variant Motor Description
XYYZZZ
2 = RV3 01 to 99 903 = 220-240V, 50/60Hz, Single phase
3 = RV5 904 = 100/200V, 50/60Hz, Single phase
4 = RV8 905 = 200-230/380-460V, 50/60Hz, Three phase
5 = RV12 906 = 110-115/120V 50/60Hz, Single phase
965 = NEMA Bareshaft
970 = ISO Bareshaft

Declaration of Conformity

© Edwards Limited 2007. All rights reserved. Page i
Edwards and the Edwards logo are trade marks of Edwards Limited.
Contents
A652–01–880 Issue S
Contents
Section Page
1 Introduction ....................................................................................... 1
1.1 Scope and definitions ................................................................................................... 1
1.2 ATEX directive implications ............................................................................................ 2
1.3 Description ................................................................................................................ 4
1.4 Performance modes and controls ..................................................................................... 4
1.4.1 Mode selector ............................................................................................................ 4
1.4.2 Gas-ballast control ...................................................................................................... 5
1.5 Construction .............................................................................................................. 5
2 Technical data .................................................................................... 7
2.1 Operating and storage conditions ..................................................................................... 7
2.2 Performance .............................................................................................................. 7
2.2.1 General .................................................................................................................... 7
2.2.2 Performance characteristics ..........................................................................................11
2.3 Mechanical data .........................................................................................................12
2.4 Noise and vibration data ...............................................................................................12
2.5 Lubrication data ........................................................................................................12
2.6 Electrical data: single-phase pumps .................................................................................14
2.7 Electrical data: three-phase pumps .................................................................................15
3 Installation ....................................................................................... 17
3.1 Safety ..................................................................................................................... 17
3.2 System design considerations .........................................................................................17
3.3 Unpack and inspect .....................................................................................................18
3.4 Locate the pump ........................................................................................................18
3.5 Fill the pump with oil ..................................................................................................18
3.6 Fit the motor (bareshaft pumps only) ...............................................................................19
3.7 Electrical installation: single-phase pumps ......................................................................... 19
3.7.1 Check and configure the motor .......................................................................................19
3.7.2 Connect the pump to your electrical supply .......................................................................19
3.7.3 Check the direction of rotation ......................................................................................20
3.8 Electrical installation: three-phase pumps .........................................................................22
3.8.1 Check and configure the motor .......................................................................................22
3.8.2 Connect the pump to your electrical supply .......................................................................22
3.8.3 Check the direction of rotation ......................................................................................24
3.9 Inlet and outlet connections ..........................................................................................24
3.10 Leak-test the system ...................................................................................................25
ITR 20439

A652–01–880 Issue S
Page ii © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trade marks of Edwards Limited.
Contents
4 Operation ........................................................................................ 27
4.1 ATEX directive implications ...........................................................................................27
4.1.1 Introduction ............................................................................................................. 27
4.1.2 Flammable/pyrophoric materials ....................................................................................27
4.1.3 Gas purges ............................................................................................................... 28
4.2 How to use the pump controls ........................................................................................28
4.2.1 Introduction ............................................................................................................. 28
4.2.2 Mode selector ...........................................................................................................29
4.2.3 Gas-ballast control .....................................................................................................29
4.3 Start-up procedure .....................................................................................................30
4.4 To achieve ultimate vacuum ..........................................................................................30
4.5 To pump condensable vapours ........................................................................................31
4.6 To decontaminate the oil ..............................................................................................31
4.7 Unattended operation ..................................................................................................31
4.8 Shut-down ................................................................................................................32
5 Maintenance ..................................................................................... 33
5.1 Safety information ......................................................................................................33
5.2 Maintenance plan .......................................................................................................34
5.3 Check the oil-level .....................................................................................................34
5.4 Replace the oil ..........................................................................................................35
5.5 Inspect and clean the inlet-filter .....................................................................................35
5.6 Inspect and clean the gas-ballast control ...........................................................................36
5.7 Clean the oil-level sight-glass .........................................................................................37
5.8 Clean the motor fan-cover and enclosure ..........................................................................38
5.9 Clean and overhaul the pump .........................................................................................38
5.10 Fit new blades ...........................................................................................................38
5.11 Test the motor condition ..............................................................................................38
5.12 Fault-finding ............................................................................................................. 38
5.12.1 Introduction .............................................................................................................38
5.12.2 The pump has failed to start ..........................................................................................38
5.12.3 The pump has failed to achieve the specified performance (has failed to reach ultimate vacuum) ...... 39
5.12.4 The pump is noisy .......................................................................................................39
5.12.5 The pump surface temperature is above 100°C ...................................................................39
5.12.6 The vacuum is not fully maintained after the pump is switched off ...........................................39
5.12.7 The pumping speed is poor ............................................................................................40
5.12.8 There is an external oil leak ..........................................................................................40
6 Storage and disposal ........................................................................... 41
6.1 Storage ...................................................................................................................41
6.2 Disposal ................................................................................................................... 41

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Edwards and the Edwards logo are trade marks of Edwards Limited.
Contents
A652–01–880 Issue S
7 Service and spares .............................................................................. 43
7.1 Introduction .............................................................................................................43
7.2 Service .................................................................................................................... 43
7.3 Spares ..................................................................................................................... 43
7.4 Accessories ...............................................................................................................45
7.4.1 Introduction ............................................................................................................. 45
7.4.2 Inlet catchpot ........................................................................................................... 45
7.4.3 Inlet dust filter .......................................................................................................... 45
7.4.4 Inlet desiccant trap ..................................................................................................... 45
7.4.5 Inlet chemical trap .....................................................................................................46
7.4.6 Foreline trap .............................................................................................................46
7.4.7 Outlet mist filter ........................................................................................................46
7.4.8 Gas-ballast adaptor .....................................................................................................46
7.4.9 Gravity oil drain kit .....................................................................................................46
7.4.10 Oil drain-extension ..................................................................................................... 46
7.4.11 Exhaust nozzle kit ...................................................................................................... 46
7.4.12 Vibration isolators ......................................................................................................46
7.4.13 Solenoid operated gas-ballast valve .................................................................................46
7.4.14 Solenoid operated pipeline valve ....................................................................................46
8 PFPE-prepared RV pumps ...................................................................... 49
8.1 Summary .................................................................................................................49
8.2 Installation ............................................................................................................... 49
8.3 Operation ................................................................................................................49
8.4 Maintenance .............................................................................................................49
9 Bareshaft RV pumps ............................................................................ 51
9.1 Description ...............................................................................................................51
9.2 Fit the motor to the bareshaft pump ................................................................................51
For return of equipment, complete the HS Forms at the end of this manual.
Illustrations
Figure Page
1 The RV pump ............................................................................................................. 3
2 Performance characteristics in High Vacuum mode (pumping speed against inlet pressure) ...............11
3 Dimensions (mm) .......................................................................................................13
4 Motor voltage configuration: single-phase pumps .................................................................21
5 Three-phase electrical connections: 200–230 V ....................................................................23
6 Three-phase electrical connections: 380–460 V ....................................................................23
7 Inlet-filter assembly ....................................................................................................35
8 Gas-ballast control assembly ..........................................................................................36
9 Sight-glass assembly ....................................................................................................37
10 Accessories ...............................................................................................................47
11 Fit the motor to a bareshaft pump ...................................................................................52

A652–01–880 Issue S
Page iv © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trade marks of Edwards Limited.
Contents
Tables
Table Page
1 Operating and storage conditions ..................................................................................... 7
2 General performance data ............................................................................................. 7
3 Performance data: High Vacuum mode .............................................................................. 8
4 Performance data: High Throughput mode .......................................................................... 9
5 Performance characteristics ..........................................................................................10
6 Mechanical data .........................................................................................................12
7 Noise and vibration data ...............................................................................................12
8 Lubrication data ........................................................................................................12
9 Electrical data (single-phase pumps with Item Numbers -903 or -906) ........................................14
10 Electrical data (single-phase pumps with Item Numbers -904) ..................................................14
11 Electrical data (three-phase pumps with Item Numbers -905) ..................................................15
12 Maintenance plan .......................................................................................................34
13 Spares and maintenance kits ..........................................................................................44
14 Accessory Item Numbers ...............................................................................................45
Associated publications
Publication title Publication number
Vacuum pump and vacuum system safety P300–20–000
Trademark credits
Fomblin®is a registered trademark of Ausimont SpA.

© Edwards Limited 2007. All rights reserved. Page 1
Edwards and the Edwards logo are trade marks of Edwards Limited.
Introduction
A652–01–880 Issue S
1Introduction
1.1 Scope and definitions
This manual provides installation, operation and maintenance instructions for the Edwards RV3, RV5, RV8 and RV12
Rotary Vane Pumps. You must use your pump as specified in this manual.
Read this manual before you install and operate your pump. Important safety information is highlighted as WARNING
and CAUTION instructions; you must obey these instructions. The use of WARNINGS and CAUTIONS is defined below.
CAUTION
Cautions are given where failure to observe the instruction could result in damage to the equipment, associated
equipment and process.
The units used throughout this manual conform to the SI international system of units of measurement
In accordance with the recommendations of IEC1010, the following warning labels are on the pump:
WARNING
Warnings are given where failure to observe the instruction could result in injury or death to
people.
Warning – refer to accompanying documentation.
Warning – risk of electric shock.
Warning – hot surfaces.

A652–01–880 Issue S
Page 2 © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trade marks of Edwards Limited.
Introduction
1.2 ATEX directive implications
zThis equipment is designed to meet the requirements of Group II Category 3 equipment in accordance with
Directive 94/9/EC of the European Parliament and the Council of 23rd March 1994 on the approximation of
the laws of the Member States concerning equipment and protective systems intended for use in potentially
explosive atmospheres. (The ATEX Directive).
The ATEX Category 3 applies in respect of potential ignition sources internal to the equipment. An ATEX Category
has not been assigned in respect of potential ignition sources on the outside of the equipment as the equipment
has not been designed for use where there is an external potentially explosive atmosphere.
There is no potential source of ignition within the pump during normal operation but there may be potential
sources of ignition under conditions of predicted and rare malfunction as defined in the Directive. Accordingly,
although the pump is designed to pump flammable materials and mixtures, operating procedures should ensure
that under all normal and reasonably predicted conditions, these materials and mixtures are not within
explosive limits. Category 3 is considered appropriate for the avoidance of ignition in the case of a rare
malfunction which allows flammable materials or mixtures to pass through the pump while within their explosive
limits.
zWhen flammable or pyrophoric materials are present within the equipment you must:
zNot allow air to enter the equipment.
zEnsure that the system is leak tight.
zFor further information, please contact Edwards: refer to the Addresses page at the end of this manual for
details of your nearest Edwards company.

© Edwards Limited 2007. All rights reserved. Page 3
Edwards and the Edwards logo are trade marks of Edwards Limited.
Introduction
A652–01–880 Issue S
Figure 1 - The RV pump
1. Electrical inlet-connector
2. Voltage indicator
3. Lifting handle *
4. NW25 inlet-port
5. Gas-ballast control
6. Oil filler-plug
7. NW25 outlet-port
8. Oil-level sight-glass
9. Oil drain-plug
10. Rubber feet (4 off)
11. Mode selector
12. On-off switch †
13. Motor fan-cover
14. Correct direction of rotation
* RV3 and RV5 pumps only; a lifting bracket is fitted to RV8 and RV12 pumps.
† Single-phase pumps only.
Note: Single-phase RV3/RV5 pump shown.

A652–01–880 Issue S
Page 4 © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trade marks of Edwards Limited.
Introduction
1.3 Description
The Edwards RV rotary vane pump is shown in Figure 1. Refer to Figure 1 for item numbers in brackets in the following
descriptions. The RV pumps are two-stage, oil-sealed, sliding-vane vacuum pumps. The pump has NW25 inlet (4) and
outlet (7) ports, a gas-ballast control (5) and a mode selector (11). When the pump is switched off, an inlet-valve
seals the inlet and prevents the suck-back of air and oil into the vacuum system.
The RV3 and RV5 pumps have a retractable lifting handle (3). The RV8 and the RV12 pumps are fitted with a lifting
bracket for use with suitable lifting equipment.
An oil-pump delivers pressurised oil to the vacuum pumping mechanism in the RV pump. You can inspect the level
and condition of the oil in the oil-box through a sight-glass (8). Two oil filler-plugs (6) and an oil drain-plug (9) are
provided on the oil-box.
The pump mechanism is driven directly by a single-phase or three-phase electric motor through a flexible
motor-coupling. The motor is totally enclosed and is cooled by the motor cooling-fan which directs air along the
motor fins. The pumps are cooled by an additional fan attached to the motor-coupling.
Single-phase motors are fitted with an on/off switch (12) and a thermal overload device. When the motor is too hot,
the thermal overload device switches off the pump. The thermal overload device has an automatic reset; when the
motor cools down, the device resets and (unless you have incorporated suitable control equipment which must be
manually reset: see Sections 3.7.2 and 3.8.2), the motor will restart.
The pump is mounted on a base plate on rubber feet (10). Details of suitable vibration isolators and other accessories
are provided in Section 7.4.
Refer to Section 8 for additional information if your pump is PFPE-prepared.
1.4 Performance modes and controls
The pump has two controls: the mode selector (11) and the gas-ballast control (5). Six possible combinations of these
controls allow for a wide choice of operating characteristics so you can optimise the performance of the pump for a
given application.
1.4.1 Mode selector
The mode selector has two positions; refer to Section 4.2 to select these positions. Throughout the rest of this
manual, the following convention is used:
zThe High Vacuum mode is specified by the 6symbol.
zThe High Throughput mode is specified by the 6symbol.
With the mode selector set to High Vacuum mode 6, pressurised oil is fed to the low vacuum stage only. In this mode
of operation, the pump provides the best possible ultimate vacuum.
With the mode selector set to High Throughput mode 6, pressurised oil is fed to the high vacuum and low vacuum
stages. In this mode of operation, the pump can sustain long-term high inlet pressures.

© Edwards Limited 2007. All rights reserved. Page 5
Edwards and the Edwards logo are trade marks of Edwards Limited.
Introduction
A652–01–880 Issue S
1.4.2 Gas-ballast control
To pump high vapour loads, gas-ballast is delivered into the pump to prevent condensation of the vapour carried by
the pumped gases.
Air can be introduced to the low vacuum stage through the gas-ballast valve. Alternatively, an inert gas such as
nitrogen can be supplied through a suitable external valve.
The gas-ballast control has three positions:
zClosed (position ‘0’)
zLow flow (position ‘I’)
zHigh flow (position ‘II’).
1.5 Construction
The pump-shafts and rotors are made of high-grade cast-iron. The pump-body and oil-box are made from
cast-aluminium. All surfaces of the pump which are exposed to the pumped gases are free from copper, zinc and
cadmium.
Other materials of construction include fluorocarbon elastomer, nitrile, silicon, chemically-resistant polymers, nickel
and stainless steel.

A652–01–880 Issue S
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This page has been intentionally left blank.

© Edwards Limited 2007. All rights reserved. Page 7
Edwards and the Edwards logo are trade marks of Edwards Limited.
Technical data
A652–01–880 Issue S
2Technicaldata
Note: To comply with CSA standards, the pump must be installed and used indoors, and within the operating
conditions specified in Table 1 below.
2.1 Operating and storage conditions
2.2 Performance
2.2.1 General
Note: In Tables 2and 3, total pressures have been measured by a capacitance diaphragm gauge on a vacuum
chamber without a cold trap, as specified by Pneurop Standard 6602 (1979).
Table 1 - Operating and storage conditions
Ambient temperature range (operation) 12 to 40°C
Ambient temperature range (storage) –30 to 70°C
Normal surface temperature of the pump-body * 50 to 70°C
Maximum humidity (operation) 90% RH
Maximum altitude (operation) 2000 m
Pollution degree 2
Installation category II
* At ultimate vacuum, with ambient temperature of 20°C.
Table 2 - General performance data
High Vacuum mode 6performance See Ta b l e 3
High Throughput mode 6performance See Ta b l e 4
Suckback protection 1 x 10-5 mbar l s-1, 1 x 10-3 Pa l s-1
Maximum initial pressure rise with no
gas-ballast flow 1 x 10-1 mbar, 10 Pa
RV3 RV5 RV8 RV12
Maximum displacement: m3h-1
50 Hz electrical supply
60 Hz electrical supply
3.7
4.5
5.8
5.0
9.7
11.7
14.2
17.0
Maximum pumping speed
(Pneurop 6602, 1979): m3h-1
50 Hz electrical supply
60 Hz electrical supply
3.3
3.9
5.1
6.2
8.5
10.0
12.0
14.2
Maximum permitted inlet pressure and
gas-ballast inlet pressure
bar gauge 0.5 0.5 0.5 0.5
Pa 1.5 x 1051.5 x 1051.5 x 1051.5 x 105
Maximum permitted outlet pressure
bargauge 1111
Pa 2 x 1052x10
52x10 52x10 5

A652–01–880 Issue S Page 8 © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trade marks of Edwards Limited.
Technical data
Table 3 - Performance data: High Vacuum mode
HIGH VACUUM MODE 6
Parameter Units RV3 RV5 RV8 RV12
1-phase 3-phase 1-phase 3-phase 1-phase 3-phase 1-phase 3-phase
Gas-ballast control closed (position ‘0’)
Ultimate total pressure mbar 2 x 10-3 2x10
-3 2x10 -3 2x10 -3
Pa 2 x 10-1 2x10
-1 2x10 -1 2x10 -1
Gas-ballast control low flow (position ‘I’)
Ultimate total pressure mbar 3 x 10-2 3x10
-2 3x10 -2 3x10 -2
Pa 3 3 3 3
Gas-ballast flow l min-1 5555
Maximum water vapour pumping rate kg h-1 0.06 0.04 0.06 0.04 0.06 0.04 0.06 0.04
Maximum water vapour inlet pressure mbar 27 18 16 11 10 7 7 5
Pa 2.7 x 1031.8 x 1031.6 x 1031.1 x 1031x10
37x10 27x10 25x10 2
Gas-ballast control high flow (position ‘II’)
Ultimate total pressure mbar 1.2 x 10-1 1x10
-1 6x10 -2 6x10 -2
Pa 1.2 x 1011x10
166
Gas-ballast flow l min-1 14 14 16 16
Maximum water vapour pumping rate kg h-1 0.22 0.12 0.22 0.12 0.22 0.20 0.29 0.25
Maximum water vapour inlet pressure mbar 80 54 50 32 38 34 32 28
Pa 8 x 1035.4 x 1035x10
33.2 x 1033.8 x 1033.4 x 1033.2 x 1032.8 x 103

© Edwards Limited 2007. All rights reserved. Page 9 Edwards and the Edwards logo are trade marks of Edwards Limited.
Technical data
A652–01–880 Issue S
Table 4 - Performance data: High Throughput mode
HIGH THROUGHPUT MODE 6
Parameter Units RV3 RV5 RV8 RV12
1-phase 3-phase 1-phase 3-phase 1-phase 3-phase 1-phase 3-phase
Gas-ballast control closed (position ‘0’)
Ultimate total pressure mbar 3 x 10-2 3x10
-2 3x10 -2 3x10 -2
Pa 3 3 3 3
Gas-ballast control low flow (position ‘I’)
Ultimate total pressure mbar 6 x 10-2 6x10
-2 4x10 -2 4x10 -2
Pa 6 6 4 4
Gas-ballast flow l min-1 5555
Maximum water vapour pumping rate kg h-1 0.06 0.04 0.06 0.04 0.06 0.04 0.06 0.04
Maximum water vapour inlet pressure mbar 27 18 16 11 10 7 7 5
Pa 2.7 x 1031.8 x 1031.6 x 1031.1 x 1031x10
37x10 27x10 25x10 2
Gas-ballast control high flow (position ‘II’)
Ultimate total pressure mbar 1.2 x 10-1 1x10
-1 6x10 -2 6x10 -2
Pa 1.2 x 1011x10
166
Gas-ballast flow l min-1 14 14 16 16
Maximum water vapour pumping rate kg h-1 0.22 0.12 0.22 0.12 0.22 0.20 0.29 0.25
Maximum water vapour inlet pressure mbar 80 54 50 32 38 34 32 28
Pa 8 x 1035.4 x 1035x10
33.2 x 1033.8 x 1033.4 x 1033.2 x 1032.8 x 103

A652–01–880 Issue S Page 10 © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trade marks of Edwards Limited.
Technical data
Table 5 - Performance characteristics
MODE
SELECTOR
POSITION
GAS BALLAST CONTROL
Closed (position ‘0’) Low flow (position ‘I’) High flow (position ‘II’)
High Vacuum mode 6Ultimate total pressure Ultimate total pressure Ultimate total pressure
mbar Pa mbar Pa mbar Pa
2x10
-3 2x10 -1 3x10 -2 31.2x10 -1 (RV3)
1.0 x 10-1 (RV5)
6x10
-2 (RV8/12)
1.2 x 101(RV3)
1.0 x 101(RV5)
6.0 (RV8/12)
Use for the best
ultimate pressure
Maximum water vapour pumping rate Maximum water vapour pumping rate
1-phase pumps 3-phase pumps 1-phase pumps 3-phase pumps
0.06 kg h-1 0.04 kg h-1 0.22 kg h-1 (RV3/5/8)
0.29 kg h-1 (RV12)
0.12 kg h-1 (RV3/5)
0.20 kg h-1 (RV8)
0.25 kg h-1 (RV12)
High Throughput mode 6Ultimate total pressure Ultimate total pressure Ultimate total pressure
mbar Pa mbar Pa mbar Pa
3x10
-2 36x10 -2 (RV3/5)
4x10
-2 (RV8/12)
6 (RV3/5)
4 (RV8/12)
1.2 x 10-1 (RV3)
1.0 x 10-1 (RV5)
6x10
-2 (RV8/12)
1.2 x 101(RV3)
1.0 x 101(RV5)
6.0 (RV8/12)
Use for continuous inlet pressure
above
50 mbar/5 x 103Pa
Maximum water vapour pumping rate Maximum water vapour pumping rate
1-phase pumps 3-phase pumps 1-phase pumps 3-phase pumps
0.06 kg h-1 0.04 kg h-1 0.22 kg h-1 (RV3/5/8)
0.29 kg h-1 (RV12)
0.12 kg h-1 (RV3/5)
0.20 kg h-1 (RV8)
0.25 kg h-1 (RV12)

© Edwards Limited 2007. All rights reserved. Page 11
Edwards and the Edwards logo are trade marks of Edwards Limited.
Technical data
A652–01–880 Issue S
2.2.2 Performance characteristics
Note: The performance characteristics described below are for use with hydrocarbon oil.
The positions of the mode selector and the gas-ballast control define the performance characteristics of the pump.
These performance characteristics are listed fully in Tables 3and 4.
Table 5 gives the ultimate vacuum and maximum water vapour inlet pressure for each of the six possible
combinations of control positions. The curves 0, I, and II in Figure 2 show the relationship between inlet pressure and
pumping speed for High Vacuum mode 6
Figure 2 - Performance characteristics in High Vacuum mode (pumping speed against inlet pressure)

A652–01–880 Issue S
Page 12 © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trade marks of Edwards Limited.
Technical data
2.3 Mechanical data
2.4 Noise and vibration data
2.5 Lubrication data
Note: Edwards Material Safety Data sheets for the rotary pump oils are available on request.
Table 6 - Mechanical data
Dimensions See Figure 3
Degree of protection (IEC 34-5: 1981)
Single-phase pumps
Three-phase pumps
IP44
IP54
Maximum tilt angle 10°
Motor rotational speed
50 Hz electrical supply
60 Hz electrical supply
1470 r min-1
1760 r min-1
Maximum mass RV3 RV5 RV8 RV12
Pumps with motor, without oil 21.6 kg 21.5 kg 26.0 kg 26.3 kg
Bareshaft pumps 14.0 kg 14.0 kg 16.5 kg 17.5 kg
Table 7 - Noise and vibration data
Sound pressure *
Single-phase pumps
Three-phase pumps
48 dB (A)
50 dB (A)
Vibration severity †
Single-phase pumps
Three-phase pumps
Class 1C
Class 1C
* Measured at ultimate vacuum 1 metre from the end of the pump to ISO 11201, High Vacuum mode 6,
50 Hz operation.
† Measured at the inlet port to ISO 2372 (1974)
Table 8 - Lubrication data
Recommended oil *
Hydrocarbon-prepared pumps
PFPE-prepared pumps
Edwards Ultragrade 19
Krytox 1506 or Fomblin 06/6
Oil capacity RV3 RV5 RV8 RV12
Maximum 0.70 litres 0.70 litres 0.75 litres 1.00 litres
Minimum 0.42 litres 0.42 litres 0.45 litres 0.65 litres
* To operate the pump when the ambient temperature is outside the limits specified in Section 2.1, or to
optimise the pump performance when you pump condensible vapours, you may need to use a different oil.

© Edwards Limited 2007. All rights reserved. Page 13
Edwards and the Edwards logo are trade marks of Edwards Limited.
Technical data
A652–01–880 Issue S
Figure 3 - Dimensions (mm)
1. On-off switch (single-phase pumps only)
2. Lifting bracket (Not fitted to RV3 and RV5
pumps: a lifting handle is fitted instead)
A. Top view of single-phase pump
B. Side view of single-phase pump
C. Side view of three-phase pump
D. Front view of single-phase pump
E. Side view of bareshaft pump
Pump A * A†BCDEFGH I JK
RV3 430 429 158 225 127 29 78 230 120 37 32 –
RV5 430 429 158 225 127 29 78 230 120 37 32 –
RV8 470 429 158 225 161 35 78 230 120 37 32 261
RV12 439 429 158 225 181 35 78 230 120 37 32 261
* Single-phase pumps. †Three-phase pumps.

A652–01–880 Issue S
Page 14 © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trade marks of Edwards Limited.
Technical data
2.6 Electrical data: single-phase pumps
Note: We recommend that you use fuses of the maximum ratings specified in Tables 9and 10. You must not use
fuses of a higher rating.
The dual-voltage, dual-frequency motor is designed for a single-phase electrical supply and is suitable for 50 Hz or
60 Hz operation. The motor can be manually switched between nominal supply voltages of 110–120 V and 220–240 V
(refer to Section 3.7.1).
When you start a cold pump, the motor will draw the start-up current shown in Tables 9and 10 for up to several
seconds, so you must use a slow-blow fuse to prevent unnecessary fuse failure during pump start-up. Within five
minutes, as the oil in the pump warms up, the current drawn will slowly reduce to the full load current specified in
Tables 9and 10.
Note: The fuse type chosen should be either a time delay type CC or a type M, or (in the UK) they should be to
BS 88.
Table 9 - Electrical data (single-phase pumps with Item Numbers -903 or -906)
Pump
Nominal
supply
(V)
Frequency
(Hz)
Power
(W)
Full load
current
(A)
Start-up
current
(A)
Maximum
fuse rating
(A)
RV3 and RV5 220–240 50 250 2.4 15.6 5
230–240 60 300 2.2 15.2 5
110 50 250 4.6 29.4 10
115–120 60 300 4.4 31.5 10
RV8 and RV12 220–240 50 450 4.0 18.0 5
230–240 60 550 3.6 18.0 5
110 50 450 7.8 34.0 13
115–120 60 550 7.2 34.0 13
Table 10 - Electrical data (single-phase pumps with Item Numbers -904)
Pump
Nominal
supply
(V)
Frequency
(Hz)
Power
(W)
Full load
current
(A)
Start-up
current
(A)
Maximum
fuse rating
(A)
RV3 and RV5 200 50 250 2.8 19.4 5
200–210 60 300 2.4 19.5 5
100 50 250 5.4 37.0 10
100–105 60 300 4.6 39.0 10
RV8 and RV12 200 50 450 3.9 21.0 5
200–210 60 550 3.8 20.6 5
100 50 450 7.6 40.0 13
100–105 60 550 7.6 41.5 13