Pfeiffer Vacuum DUO 20 MC User manual

OPERATING INSTRUCTIONS
EN
Translation of the Original
DUO 20 M | DUO 20 MC
Rotary vane pump

Dear Customer,
Thank you for choosing a Pfeiffer Vacuum product. Your new rotary vane pump is designed
to support you by its performance, its perfect operation and without interfering your individual
application. The name Pfeiffer Vacuum stands for high-quality vacuum technology, a
comprehensive and complete range of top-quality products and first-class service. With this
expertise, we have acquired a multitude of skills contributing to an efficient and secure
implementation of our product.
Knowing that our product must not interfere with your actual work, we are convinced that our
product offers you the solution that supports you in the effective and trouble-free execution of
your individual application.
Please read these operating instructions before putting your product into operation for the
first time. If you have any questions or suggestions, please feel free to contact info@pfeiffer-
vacuum.de.
Further operating instructions from Pfeiffer Vacuum can be found in the Download Center on
our website.
Disclaimer of liability
These operating instructions describe all models and variants of your product. Note that your
product may not be equipped with all features described in this document. Pfeiffer Vacuum
constantly adapts its products to the latest state of the art without prior notice. Please take
into account that online operating instructions can deviate from the printed operating
instructions supplied with your product.
Furthermore, Pfeiffer Vacuum assumes no responsibility or liability for damage resulting from
the use of the product that contradicts its proper use or is explicitly defined as foreseeable
misuse.
Copyright
This document is the intellectual property of Pfeiffer Vacuum and all contents of this
document are protected by copyright. They may not be copied, altered, reproduced or
published without the prior written permission of Pfeiffer Vacuum.
We reserve the right to make changes to the technical data and information in this document.
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Table of contents
1 About this manual 7
1.1 Validity 7
1.1.1 Applicable documents 7
1.1.2 Variants 7
1.2 Target group 7
1.3 Conventions 7
1.3.1 Instructions in the text 7
1.3.2 Pictographs 7
1.3.3 Stickers on the product 8
1.3.4 Abbreviations 10
2 Safety 11
2.1 General safety information 11
2.2 Safety instructions 11
2.3 Safety precautions 15
2.4 Safety precautions for vacuum pumps with magnetic coupling 15
2.5 Limits of use of the product 15
2.6 Proper use 16
2.7 Foreseeable improper use 16
2.8 Personnel qualification 16
2.8.1 Ensuring personnel qualification 17
2.8.2 Personnel qualification for maintenance and repair 17
2.8.3 Advanced training with Pfeiffer Vacuum 17
3 Product description 18
3.1 Function 18
3.2 Operating principle 18
3.3 Product features 19
3.4 Identifying the product 19
3.5 Scope of delivery 19
4 Transportation and Storage 20
4.1 Transport vacuum pump 20
4.2 Storing the vacuum pump 20
5 Installation 22
5.1 Set up the vacuum pump 22
5.2 Connect the vacuum side 22
5.3 Connect the exhaust side 23
5.4 Fill operating fluid 24
5.5 Connect to mains power supply 25
5.5.1 Connecting single-phase motors 26
5.5.2 Connect three phase motor with 6-pin terminal board 27
5.5.3 Frequency inverter for vacuum pumps with 3-phase motor 28
5.5.4 Checking the direction of rotation 28
5.5.5 Connecting the PTC thermistor tripping unit 28
5.5.6 Setting the motor protection switch 29
6 Operation 31
6.1 Putting the vacuum pump into operation 31
6.2 Switch vacuum pump on 31
6.3 Operating the rotary vane pump with gas ballast 32
6.3.1 Gas ballast valve – standard version 32
6.3.2 Gas ballast valve with flushing gas connection 33
6.4 Refilling operating fluid 34
6.5 Switching off the vacuum pump 34
Table of contents
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7 Maintenance 36
7.1 Maintenance instructions 36
7.2 Maintenance instructions for magnetic coupling 37
7.3 Checklist for inspection and maintenance 37
7.4 Change the operating fluid 38
7.4.1 Determine degree of aging of P3 operating fluid 39
7.4.2 Change the operating fluid 39
7.4.3 Rinse and clean rotary vane vacuum pump 41
7.5 Remove and clean gas ballast filter 42
7.5.1 Remove gas ballast valve 42
7.5.2 Strip and clean gas ballast valve 43
7.5.3 Remove and clean silencer nozzle 43
7.5.4 Install gas ballast valve 44
7.6 Changing the operating fluid type 44
8 Decommissioning 45
8.1 Shutting down for longer periods 45
8.2 Recommissioning 45
9 Recycling and disposal 46
9.1 General disposal information 46
9.2 Dispose of rotary vane pump 46
10 Malfunctions 47
11 Service solutions by Pfeiffer Vacuum 49
12 Spare parts 51
12.1 Spare part packages 51
12.2 Maintenance kit 1 – maintenance level 1 51
12.3 Overhaul kit – Maintenance level 3 52
12.4 Coupling set for versions with magnetic coupling 52
12.5 Set of vanes 52
13 Accessories 53
13.1 Accessory information 53
13.2 Order accessories 53
14 Technical data and dimensions 55
14.1 General 55
14.2 Technical data 55
14.3 Dimensions 57
Declaration of conformity 59
Table of contents
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List of tables
Tbl. 1: Stickers on the product 9
Tbl. 2: Abbreviations used in this document 10
Tbl. 3: Limits of use of the product 16
Tbl. 4: Features of the rotary vane pumps 19
Tbl. 5: Recommended fuse ratings for on-site protection 27
Tbl. 6: Permissible voltage ranges for reversible single phase motor 27
Tbl. 7: Motor protection switch settings 30
Tbl. 8: Maintenance intervals 38
Tbl. 9: Troubleshooting for rotary vane pumps 48
Tbl. 10: Spare part packages 51
Tbl. 11: Content of maintenance kit 1 52
Tbl. 12: Accessories for Duo 20 M 54
Tbl. 13: Accessories for Duo 20 MC 54
Tbl. 14: Consumables 54
Tbl. 15: Conversion table: Pressure units 55
Tbl. 16: Conversion table: Units for gas throughput 55
Tbl. 17: Technical data, Duo 20 M 56
Tbl. 18: Technical data, Duo 20 MC 57
Tbl. 19: Dimensions 58
List of tables
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List of figures
Fig. 1: Position of the stickers on the product 9
Fig. 2: Structure of the rotary vane pump 18
Fig. 3: Rotary vane vacuum pump functional principle 18
Fig. 4: Transport vacuum pump 20
Fig. 5: Minimum distances and permissible inclination 22
Fig. 6: Vacuum connection with flange connection 23
Fig. 7: Exhaust connection with flange connection 24
Fig. 8: Fill operating fluid 25
Fig. 9: Motor circuit diagram, single phase motor 26
Fig. 10: Delta connection for low voltage 27
Fig. 11: Star circuit for high voltage 28
Fig. 12: Connection example with PTC thermistor tripping unit 29
Fig. 13: Gas ballast valve, standard version 33
Fig. 14: Gas ballast valve with flushing gas connection 33
Fig. 15: Fill operating fluid 34
Fig. 16: Draining the operating fluid 40
Fig. 17: Remove rotary vane pump cap 41
Fig. 18: Individual parts of the gas ballast valve 42
Fig. 19: Remove gas ballast valve 42
Fig. 20: Remove silencer nozzle 43
Fig. 21: Content of maintenance kit 1 – maintenance level 1 51
Fig. 22: Dimensions Duo 20 M / Duo 20 MC 57
List of figures
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1 About this manual
IMPORTANT
Read carefully before use.
Keep the manual for future consultation.
1.1 Validity
This operating instructions is a customer document of Pfeiffer Vacuum. The operating instructions de-
scribe the functions of the named product and provide the most important information for the safe use of
the device. The description is written in accordance with the valid directives. The information in this op-
erating instructions refers to the product's current development status. The document shall remain valid
provided that the customer does not make any changes to the product.
1.1.1 Applicable documents
Designation Document
Declaration of conformity A component of these operating instructions
1.1.2 Variants
These instructions apply to DuoLine vacuum pumps.
●Duo 20 M
●Duo 20 MC
1.2 Target group
These operating instructions are aimed at all persons performing the following activities on the product:
●Transportation
●Setup (Installation)
●Usage and operation
●Decommissioning
●Maintenance and cleaning
●Storage or disposal
The work described in this document is only permitted to be performed by persons with the appropriate
technical qualifications (expert personnel) or who have received the relevant training from Pfeiffer Vac-
uum.
1.3 Conventions
1.3.1 Instructions in the text
Usage instructions in the document follow a general structure that is complete in itself. The required ac-
tion is indicated by an individual step or multi-part action steps.
Individual action step
A horizontal, solid triangle indicates the only step in an action.
►This is an individual action step.
Sequence of multi-part action steps
The numerical list indicates an action with multiple necessary steps.
1. Step 1
2. Step 2
3. ...
1.3.2 Pictographs
Pictographs used in the document indicate useful information.
About this manual
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Note
Tip
1.3.3 Stickers on the product
This section describes all the stickers on the product along with their meanings.
D-35641 Asslar
Mod.: DUO 20 M
Mod.-Nr.: PK D63 XXX
Ser.- Nr.: 1234567
S : max. 24 m /h
Oil : P3 1 l
Mass : 37 kg
n : XXXX 1/min
(N )
2
3
max.
Made in Germany 2020/09
VACUUM
Rating plate (example)
The rating plate is located on the front right side next to the sight glass
Motor rating plate (not shown)
Vor Inbetriebnahme Pumpe mit Öl
füllen
Fill the pump with oil before putting
into operation
Remplir la pompe d’huile avant la mise
en route
Sticker (red)
Fill rotary vane pump with operating fluid before commissioning
ACHTUNG!
Vor dem Einfüllen des Öles Drehrichtung der
Pumpe prüfen!
ATTENTION!
Before filling in the oil check direction of
rotation of the pump!
ATTENTION!
Avant remplir l’huile vérifier le sense de rotation
de la pompe!
Sticker (yellow) – three phase motor only
Attention! Check the direction of rotation of the rotary vane pump be-
fore filling with operating fluid.
Achtung!
nur mit F4 befüllen
Attention!
only F4 to be used
Sticker (orange) – special operating fluid only
Attention! Fill rotary vane pump with F4 only
Achtung!
nur mit D1 befüllen
Attention!
only D1 to be used
Sticker (blue) – special operating fluid only
Attention! Fill rotary vane pump with D1 only
Sense of rotation arrow (three phase motor only)
The direction of rotation arrow indicates the required motor sense of
rotation.
ACHTUNG
Die Pumpe ist mit einem spannungsumschaltbaren
Motor ausgerüstet und kann über einen Schalter
im Klemmenkasten umgeschaltet werden.
Bitte führen Sie die Umstellung nur gemäß
Betriebsanleitung durch.
ATTENTION
The pump ist equipped with a dual voltage motor
and is preset via switch in the terminal box.
Please refer to the operating instructions to
make a voltage change.
Sticker for single phase motor with voltage selection
Before commissioning, check voltage and change over at the terminal
box on the motor if needed.
About this manual
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preset for
eingestellt auf
200-230 V / 50 Hz
200-240 V / 60 Hz
preset for
eingestellt auf
100-110 V / 50 Hz
100-120 V / 60 Hz
Sticker for pre-set motor voltage
Pre-set voltage (230 V or 115 V) of single phase motor with voltage se-
lection
Warning hot surface
This sticker warns of injuries caused by high temperatures as a result
of contact without protection during operation.
Tbl. 1: Stickers on the product
5–8
9
4
2
3
1
Fig. 1: Position of the stickers on the product
1 Sense of rotation sticker 6 Check direction of rotation note
2 Voltage selection sticker 7 Note F4 Operating fluid
3 Sticker for pre-set motor voltage 8 Note D1 Operating fluid
4 Rating plate 9 Warning hot surface
5 Fill oil note
About this manual
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1.3.4 Abbreviations
Abbreviation Explanation
OI Operating instructions
C version Corrosive gas version
DN Nominal diameter (Diamètre nominal)
FCR Fluorinated rubber
INRated (nominal) current
Imax Maximum current
ISO Flange: Connector in accordance with ISO 1609 and ISO 2861
M version Version with magnetic coupling
PE Protective ground (protective earth)
ODK Operating fluid return line (oil drain kit)
PTC Temperature-dependent resistor (positive temperature coefficient)
M version Version with magnetic coupling
MC version Corrosive gas version with magnetic coupling
OME Oil mist filter (oil mist eliminator)
RSSR Radial shaft seal ring
WAF Wrench size
MM Maintenance manual
Tbl. 2: Abbreviations used in this document
About this manual
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2 Safety
2.1 General safety information
The following 4 risk levels and 1 information level are taken into account in this document.
DANGER
Immediately pending danger
Indicates an immediately pending danger that will result in death or serious injury if not observed.
►Instructions to avoid the danger situation
WARNING
Potential pending danger
Indicates a pending danger that could result in death or serious injury if not observed.
►Instructions to avoid the danger situation
CAUTION
Potential pending danger
Indicates a pending danger that could result in minor injuries if not observed.
►Instructions to avoid the danger situation
NOTICE
Danger of damage to property
Is used to highlight actions that are not associated with personal injury.
►Instructions to avoid damage to property
Notes, tips or examples indicate important information about the product or about this docu-
ment.
2.2 Safety instructions
All safety instructions in this document are based on the results of the risk assessment carried out in
accordance with Machinery Directive 2006/42/EC Annex I and EN ISO 12100 Section 5. Where applica-
ble, all life cycle phases of the product were taken into account.
Risks during transport
WARNING
Danger of serious injury due to falling objects
Due to falling objects there is a risk of injuries to limbs through to broken bones.
►Take particular care and pay special attention when transporting products manually.
►Do not stack the products.
►Wear protective equipment, e.g. safety shoes.
Safety
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Risks during installation
DANGER
Danger to life from electric shock
Touching exposed and voltage-bearing elements causes an electric shock. Improper connection of
the mains supply leads to the risk of touchable live housing parts. There is a risk to life.
►Before the installation, check that the connection leads are voltage-free.
►Make sure that electrical installations are only carried out by qualified electricians.
►Provide adequate grounding for the device.
►After connection work, carry out an earthed conductor check.
WARNING
Danger of poisoning from toxic vapors
Igniting and heating synthetic operating fluid generates toxic vapors. Danger of poisoning if inhaled.
►Observe the application instructions and precautions.
►Do not allow tobacco products to come into contact with the operating fluid.
CAUTION
Danger of burns on hot surfaces
Depending on the operating and ambient conditions, the surface temperature of the vacuum pump
can increase to above 70 °C. If access to the vacuum pump is unrestricted, there is a danger of burns
due to contact with hot surfaces.
►Install suitable touch protection if the vacuum pump is accessible to untrained persons.
►Allow the vacuum pump to cool down before carrying out any work.
►Contact Pfeiffer Vacuum for suitable touch protection in system solutions.
Risks during operation
WARNING
Danger of poisoning due to toxic process media escaping from the exhaust pipe
During operation with no exhaust line, the vacuum pump allows exhaust gases and vapors to escape
freely into the air. There is a risk of injury and fatality due to poisoning in processes with toxic process
media.
►Observe the pertinent regulations for handling toxic process media.
►Safely purge toxic process media via an exhaust line.
►Use appropriate filter equipment to separate toxic process media.
WARNING
Danger of poisoning from toxic vapors
Igniting and heating synthetic operating fluid generates toxic vapors. Danger of poisoning if inhaled.
►Observe the application instructions and precautions.
►Do not allow tobacco products to come into contact with the operating fluid.
CAUTION
Risk of injury from entrapment of body parts
After a power failure or a standstill as a result of overheating, the motor restarts automatically. A risk
exists of minor injury to fingers and hands (e.g., hematoma), from direct contact with the vacuum
flange.
►Maintain sufficient distance to the vacuum flange during all work.
►Safely disconnect motor from the mains.
►Secure the motor against re-start.
Safety
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CAUTION
Danger of injury from bursting as a result of high pressure in the exhaust line
Faulty or inadequate exhaust pipes lead to dangerous situations, e.g. increased exhaust pressure.
There is a danger of bursting. Injuries caused by flying fragments, the escaping of high pressure, and
damage to the unit cannot be excluded.
►Route the exhaust line without shut-off units.
►Observe the permissible pressures and pressure differentials for the product.
►Check the function of the exhaust line on a regular basis.
CAUTION
Danger of burns on hot surfaces
Depending on the operating and ambient conditions, the surface temperature of the vacuum pump
can increase to above 70 °C. If access to the vacuum pump is unrestricted, there is a danger of burns
due to contact with hot surfaces.
►Install suitable touch protection if the vacuum pump is accessible to untrained persons.
►Allow the vacuum pump to cool down before carrying out any work.
►Contact Pfeiffer Vacuum for suitable touch protection in system solutions.
Risks during maintenance, decommissioning and malfunctions
WARNING
Health hazard through poisoning from toxic contaminated components or devices
Toxic process media result in contamination of devices or parts of them. During maintenance work,
there is a risk to health from contact with these poisonous substances. Illegal disposal of toxic sub-
stances causes environmental damage.
►Take suitable safety precautions and prevent health hazards or environmental pollution by toxic
process media.
►Decontaminate affected parts before carrying out maintenance work.
►Wear protective equipment.
WARNING
Danger of injury from strong magnetic field
There is a risk of injury for people with pacemakers and medical implants.
►Make sure that such individuals do not enter the sphere of influence (≤ 2 m) of the magnetic field.
►Identify rooms in which magnetic couplings are openly accessible with the symbol: "No access
for people with pacemakers".
►Always keep disassembled couplings away from computers, data carriers, and other electronic
components.
WARNING
Danger of poisoning from toxic vapors
Igniting and heating synthetic operating fluid generates toxic vapors. Danger of poisoning if inhaled.
►Observe the application instructions and precautions.
►Do not allow tobacco products to come into contact with the operating fluid.
WARNING
Health hazard and risk of environmental damage from toxic contaminated operating fluid
Toxic process media can cause operating fluid contamination. When changing the operating fluid,
there is a health hazard due to contact with poisonous substances. Illegal disposal of toxic substan-
ces causes environmental damage.
►Wear suitable personal protective equipment when handling these media.
►Dispose of the operating fluid according to locally applicable regulations.
Safety
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WARNING
Danger to life from electric shock in the event of a fault
In the event of a fault, devices connected to the mains may be live. There is a danger to life from
electric shock when making contact with live components.
►Always keep the mains connection freely accessible so you can disconnect it at any time.
CAUTION
Scalding from hot operating fluid
Danger of burns when draining operating fluid if it comes into contact with the skin.
►Wear protective equipment.
►Use a suitable collection receptacle.
CAUTION
Risk of injury from entrapment of body parts
After a power failure or a standstill as a result of overheating, the motor restarts automatically. A risk
exists of minor injury to fingers and hands (e.g., hematoma), from direct contact with the vacuum
flange.
►Maintain sufficient distance to the vacuum flange during all work.
►Safely disconnect motor from the mains.
►Secure the motor against re-start.
CAUTION
Danger of burns on hot surfaces
In the event of a fault, the surface temperature of the vacuum pump can increase to above 105 °C.
►Allow the vacuum pump to cool down before carrying out any work.
►Wear personal protective equipment if necessary.
CAUTION
Danger of injury from moving parts
After a power failure or a standstill as a result of overheating, the motor restarts automatically. There
is a risk of injury to fingers and hands if they enter the operating range of rotating parts.
►Safely disconnect motor from the mains.
►Secure the motor against reactivation.
►Dismantle the vacuum pump for inspection, away from the system if necessary.
Risks during disposal
WARNING
Health hazard through poisoning from toxic contaminated components or devices
Toxic process media result in contamination of devices or parts of them. During maintenance work,
there is a risk to health from contact with these poisonous substances. Illegal disposal of toxic sub-
stances causes environmental damage.
►Take suitable safety precautions and prevent health hazards or environmental pollution by toxic
process media.
►Decontaminate affected parts before carrying out maintenance work.
►Wear protective equipment.
Safety
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2.3 Safety precautions
Duty to provide information on potential dangers
The product holder or user is obliged to make all operating personnel aware of dangers
posed by this product.
Every person who is involved in the installation, operation or maintenance of the product
must read, understand and adhere to the safety-related parts of this document.
Infringement of conformity due to modifications to the product
The Declaration of Conformity from the manufacturer is no longer valid if the operator
changes the original product or installs additional equipment.
●Following the installation into a system, the operator is required to check and re-evalu-
ate the conformity of the overall system in the context of the relevant European Direc-
tives, before commissioning that system.
General safety precautions when handling the product
►Observe all applicable safety and accident prevention regulations.
►Check that all safety measures are observed at regular intervals.
►Do not expose body parts to the vacuum.
►Always ensure a secure connection to the earthed conductor (PE).
►Never disconnect plug connections during operation.
►Observe the above shutdown procedures.
►Keep lines and cables away from hot surfaces (> 70 °C).
►Never fill or operate the unit with cleaning agents or cleaning agent residues.
►Do not carry out your own conversions or modifications on the unit.
►Observe the unit protection class prior to installation or operation in other environments.
►Provide suitable touch protection, if the surface temperature exceeds 70 °C.
2.4 Safety precautions for vacuum pumps with magnetic coupling
The following safety instructions are only valid for the working with a drive system of a vacuum pump
with a magnetic coupling:
Safety precautions
►Keep a magnetic coupling away from people with pacemakers.
–Minimum distance: 2 m
►Avoid convergence of magnetic coupling components.
►Keep magnetized parts away from the magnetic coupling.
►Always keep a disassembled magnetic coupling away from computers, data carriers and other
electronic components.
–The magnetic coupling can influence operational reliability of electrical and electronic devices.
2.5 Limits of use of the product
Installation location ● Indoors, protected from dust deposits
● Outdoors, protected from direct weather influen-
ces
Installation altitude max. 1000 m above sea level
At installation heights > 1000 m above sea level, the
rated power of the motor must be reduced or the am-
bient temperature limited due to increased heating of
the vacuum pump.
Protection class (according to IEC 61010) I
Degree of pollution (according to IEC 61010) 2
Overvoltage category II
Protection class IP55
permissible angle of inclination ± 10 °
Ambient temperature +12 ℃ to +40 ℃
Safety
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Relative humidity of air max. 85%
Pumped medium intake temperature, max. +40 °C
Exhaust pressure of the vacuum pump ≤ 1500 hPa absolute
Exhaust pressure at OME max. atmospheric pressure
Tbl. 3: Limits of use of the product
2.6 Proper use
►Use the vacuum pump for vacuum generation only.
►When pumping media with an oxygen concentration level of ≥ 21 %, only use perfluorinated, syn-
thetic oils (F4, F5, A113) as operating fluid.
►Adhere to the installation, commissioning, operating, and maintenance instructions.
►Do not use any accessory parts other than those recommended by Pfeiffer Vacuum.
2.7 Foreseeable improper use
Improper use of the product invalidates all warranty and liability claims. Any use that is counter to the
purpose of the product, whether intentional or unintentional, is regarded as improper use; in particular:
●Pumping of corrosive media (exception: C version of the rotary vane vacuum pumps)
●Pumping radioactive media
●Pumping of gases that introduce an ignition source to the suction chamber
●Pumping of gases that contain impurities such as particles, dust, or condensate
●Pumping explosive media
●Pumping of media with a propensity to sublimation
●Pumping of fluids
●Use of the vacuum pump in potentially explosive atmospheres
●Use of the vacuum pump outside the specified area of application
●Use for pressure generation
●Use in strong electrical, magnetic, or electromagnetic fields
●Connection to vacuum pumps or equipment which are not suitable for this purpose according to
their operating instructions
●Connection to devices with exposed live parts
●Use of accessories or spare parts not listed in these instructions
●Use of operating fluids other than those specified by Pfeiffer Vacuum
●Use of D1 or mineral oil as operating fluid with an oxygen concentration level of > 21%.
Mineral oils are combustible and ignite at high temperatures and when they come into contact with
pure oxygen. These oils oxidize heavily and thus lose their lubricating capacity.
2.8 Personnel qualification
The work described in this document may only be carried out by persons who have appropriate profes-
sional qualifications and the necessary experience or who have completed the necessary training as
provided by Pfeiffer Vacuum.
Training people
1. Train the technical personnel on the product.
2. Only let personnel to be trained work with and on the product when under the supervision of
trained personnel.
3. Only allow trained technical personnel to work with the product.
4. Before starting work, make sure that the commissioned personnel have read and understood
these operating instructions and all applicable documents, in particular the safety, maintenance
and repair information.
Safety
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2.8.1 Ensuring personnel qualification
Specialist for mechanical work
Only a trained specialist may carry out mechanical work. Within the meaning of this document, special-
ists are people responsible for construction, mechanical installation, troubleshooting and maintenance
of the product, and who have the following qualifications:
●Qualification in the mechanical field in accordance with nationally applicable regulations
●Knowledge of this documentation
Specialist for electrotechnical work
Only a trained electrician may carry out electrical engineering work. Within the meaning of this docu-
ment, electricians are people responsible for electrical installation, commissioning, troubleshooting, and
maintenance of the product, and who have the following qualifications:
●Qualification in the electrical engineering field in accordance with nationally applicable regulations
●Knowledge of this documentation
In addition, these individuals must be familiar with applicable safety regulations and laws, as well as the
other standards, guidelines, and laws referred to in this documentation. The above individuals must
have an explicitly granted operational authorization to commission, program, configure, mark, and earth
devices, systems, and circuits in accordance with safety technology standards.
Trained individuals
Only adequately trained individuals may carry out all works in other transport, storage, operation and
disposal fields. Such training must ensure that individuals are capable of carrying out the required activi-
ties and work steps safely and properly.
2.8.2 Personnel qualification for maintenance and repair
Advanced training courses
Pfeiffer Vacuum offers advanced training courses to maintenance levels 2 and 3.
Adequately trained individuals are:
●Maintenance level 1
─Customer (trained specialist)
●Maintenance level 2
─Customer with technical education
─Pfeiffer Vacuum service technician
●Maintenance level 3
─Customer with Pfeiffer Vacuum service training
─Pfeiffer Vacuum service technician
2.8.3 Advanced training with Pfeiffer Vacuum
For optimal and trouble-free use of this product, Pfeiffer Vacuum offers a comprehensive range of
courses and technical trainings.
For more information, please contact Pfeiffer Vacuum technical training.
Safety
17/60

3 Product description
3.1 Function
DuoLine rotary vane vacuum pumps are two-stage, oil-sealed rotary positive displacement pumps for
use in coarse and medium vacuum. The vacuum pumps are equipped with a safety valve that vacuum
seals the vacuum chamber and simultaneously vents the vacuum pump when the pump is at a stand-
still. The rotary vane pump has a contactless and wear proof drive with magnetic coupling. The pump
housing is hermetically sealed.
7
89
10
11
6
5
4
3
2
1
12
Fig. 2: Structure of the rotary vane pump
1 Sight glass 7 Mains switch (single-phase motor
only)
2 Filler screw 8 Motor
3 Gas ballast valve 9 Locking screw (oil pressure switch)
4 Fore-vacuum connection, DN 25 ISO-KF, with protective
cap 10 Base plate
5 Crane lug 11 Stand
6 Exhaust connection, DN 25 ISO-KF, with protective cap 12 Drain screw
3.2 Operating principle
1
3
4
5
62
Fig. 3: Rotary vane vacuum pump functional principle
1 Housing 4 Vane
2 Vacuum flange (inlet) 5 Suction chamber
3 Rotor 6 Exhaust (outlet)
The rotary vane pump is an oil-sealed rotational displacement pump. The pumping system is made up
of the housing, the eccentrically mounted rotor, and the centrifugally- and spring-loaded radially sliding
Product description
18/60

vanes, which divide the suction chamber into multiple chambers. The volume of each chamber changes
periodically as the rotor rotates. This causes the gas to be drawn in at the vacuum flange and com-
pressed in the suction chamber by the rotation of the rotor, until the exhaust valve opens against the
atmospheric pressure at the outlet and expels the gas. The exhaust valve is oil-sealed. When the valve
opens, a small quantity of oil penetrates into the suction chamber. In addition to lubrication, this also
causes the gaps between the rotor, stator and vanes to seal.
Vacuum safety valve
Depending on the pump type, rotary vane pumps are equipped with a vacuum safety valve. This sepa-
rates the rotary vane pump from the vacuum chamber in the event of intentional or unintentional stand-
still, and vents the pumping system with the displaced gas so that oil does not rise into the vacuum
chamber. After switching on, the valve opens after a delay.
Gas ballast valve
The gas ballast device is used to blend ambient air or inert gas with the process gas in the pumping
system. The increase of air content compresses and expels a pumped gas-vapor-mixture within specific
limits, without causing condensation in the suction chamber.
Operating fluid, oil
The pump oil, also known as operating fluid, fulfills various tasks in a rotary vane pump:
●lubrication of all moving parts
●filling part of the dead volume under the exhaust valve
●sealing the gap between the intake and exhaust channel, and between the vanes and the working
chamber
●ensuring an optimal temperature balance through heat transfer
3.3 Product features
Pump type Characteristics
Duo 20 M Standard version with magnetic coupling
Duo 20 MC MC version; differs compared to the standard version by:
● Operating fluid F4
● Magnetic coupling encapsulated on the pump side
● Vane material changed
● Hose connection on the gas ballast valve
●Leakage rate ≤ 1 × 10-6 Pa m3/s
Tbl. 4: Features of the rotary vane pumps
3.4 Identifying the product
►To ensure clear identification of the product when communicating with Pfeiffer Vacuum, always
keep all of the information on the rating plate to hand.
►Observe the motor-specific data on the motor rating plate attached separately.
3.5 Scope of delivery
●Rotary vane vacuum pump with motor
●Operating fluid (other than F4, F5 and A113)
●Centering ring with cone sieve and O-ring for the connection flange
●Locking caps for both connection flanges
●Operating instructions
Product description
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4 Transportation and Storage
4.1 Transport vacuum pump
WARNING
Danger of serious injury due to falling objects
Due to falling objects there is a risk of injuries to limbs through to broken bones.
►Take particular care and pay special attention when transporting products manually.
►Do not stack the products.
►Wear protective equipment, e.g. safety shoes.
Preparations for transport
Pfeiffer Vacuum recommends keeping the transport packaging and original protective cov-
er.
General information regarding safe transport
1. Observe the weight specified on packaging.
2. Use a transport aid if necessary (trolley, lift truck).
3. Transport the product in its original packaging.
4. Always place the product on an adequately sized, level surface.
3
2
1
Fig. 4: Transport vacuum pump
1 Vacuum connection protective cover 3 Exhaust connection protective cover
2 Crane lug
Transporting the vacuum pump without its packaging
1. Unpack the vacuum pump.
2. To protect the inside of the pump, leave both protective caps on the connection flanges during
transport.
3. For lifting, use the crane lug provided for this purpose, located on the top of the pump.
4. Lift the vacuum pump out of the transport packaging.
5. Always place the vacuum pump on an adequately sized, level surface.
4.2 Storing the vacuum pump
Storage
Pfeiffer Vacuum recommends storing the products in their original transport packaging.
Transportation and Storage
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