Pfeiffer Vacuum OKTA 8000 G ATEX User manual

OPERATING INSTRUCTIONS
EN
Translation of the Original
OKTA 8000 G ATEX
Roots pump

Dear Customer,
Thank you for choosing a Pfeiffer Vacuum product. Your new roots pump should support you
in your individual application with full performance and without malfunctions. The name
Pfeiffer Vacuum stands for high-quality vacuum technology, a comprehensive and complete
range of top-quality products and first-class service. From this extensive, practical experience
we have gained a large volume of information that can contribute to efficient deployment and
to your personal safety.
In the knowledge that our product must avoid consuming work output, we trust that our
product can offer you a solution that supports you in the effective and trouble-free
implementation 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.
2/62

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 8
1.3.3 Stickers on the product 8
1.3.4 Abbreviations 9
1.4 Trademark proof 9
2 Safety 10
2.1 General safety information 10
2.2 Safety instructions 10
2.3 Safety precautions 14
2.4 ATEX classification and safety measures 14
2.4.1 Labeling of the vacuum pump 15
2.4.2 Potential hazards 16
2.4.3 Safety measures 16
2.5 Product usage limits 17
2.6 Proper use 17
2.7 Foreseeable improper use 17
2.8 Personnel qualification 18
2.8.1 Ensuring personnel qualification 18
2.8.2 Personnel qualification for maintenance and repair 19
2.8.3 Advanced training with Pfeiffer Vacuum 19
3 Product description 20
3.1 Function 20
3.2 Identifying the product 21
3.3 Scope of delivery 21
4 Transportation and Storage 22
4.1 Transporting the vacuum pump 22
4.2 Storing the vacuum pump 23
5 Installation 24
5.1 Preparatory work 24
5.2 Installing the vacuum pump 25
5.3 Filling with lubricant 25
5.4 Fill the sealing medium for the axial face seal 26
5.5 Connecting the vacuum side 27
5.6 Connecting the fore-vacuum side 29
5.7 Connecting the gas cooler 29
5.8 Connecting the cooling water supply 30
5.9 Setting and checking the temperature monitoring 32
5.9.1 Check thermometer installation dimension 32
5.9.2 Arrange a signal evaluation for the thermometer 33
5.10 Establishing mains connection 34
5.10.1Connect three phase motor with 6-pin terminal board 34
5.10.2Checking the direction of rotation 35
5.10.3Connecting the PTC thermistor tripping unit 36
5.11 Assembling the motor and coupling 36
6 Operation 38
6.1 Putting the vacuum pump into operation 38
Table of contents
3/62

6.2 Operation with frequency converter 38
6.2.1 Observe the voltage slew rate 38
6.2.2 Observe the mechanical resonance 38
6.3 Switching on the vacuum pump 39
6.4 Adjusting the sealing gas amount 40
6.5 Vibration monitoring 40
6.5.1 Condition monitoring of the vacuum pump 42
6.5.2 Monitoring the bearing condition 42
6.5.3 Monitoring the motor condition 43
6.6 Switching off and venting the vacuum pump 44
6.7 Restarting 44
7 Maintenance 45
7.1 Maintenance information 45
7.2 Checklist for inspection and maintenance 46
7.3 Changing the lubricant 47
7.4 Cleaning the suction chamber 48
8 Decommissioning 50
8.1 Shutting down for longer periods 50
8.2 Recommissioning 50
9 Recycling and disposal 51
9.1 General disposal information 51
9.2 Dispose of Okta roots pumps 51
10 Malfunctions 52
11 Service solutions by Pfeiffer Vacuum 54
12 Spare parts 56
12.1 Ordering spare parts packs 56
13 Accessories 57
13.1 Accessory information 57
13.2 Ordering accessories 57
14 Technical data and dimensions 58
14.1 General 58
14.2 Substances in contact with the media 58
14.3 Technical data 58
14.4 Dimensions 59
Declaration of conformity 60
Table of contents
4/62

List of tables
Tbl. 1: Stickers on the product 8
Tbl. 2: Abbreviations used 9
Tbl. 3: ATEX designations 16
Tbl. 4: Potential hazards 16
Tbl. 5: Measures and safety equipment 16
Tbl. 6: Permissible ambient conditions 17
Tbl. 7: Permissible sealing media 27
Tbl. 8: Maximum permissible forces and torques on the connection flange 28
Tbl. 9: Requirements on the cooling water composition 31
Tbl. 10: Thermometer type 32
Tbl. 11: EPL (Equipment protection level) 33
Tbl. 12: Permissible deviation between motor shaft and pump shaft 37
Tbl. 13: Evaluated frequency ranges 42
Tbl. 14: Characteristic bearing damage frequencies of the roots pump 43
Tbl. 15: Characteristic frequencies of the roots pump 43
Tbl. 16: Evaluated frequency range of the motor 43
Tbl. 17: Maintenance intervals 47
Tbl. 18: Troubleshooting 53
Tbl. 19: Accessories 57
Tbl. 20: Consumables 57
Tbl. 21: Conversion table: Pressure units 58
Tbl. 22: Conversion table: Units for gas throughput 58
Tbl. 23: Materials that make contact with the process media 58
Tbl. 24: Technical data for category 3G 59
List of tables
5/62

List of figures
Fig. 1: Position of the stickers on the product 9
Fig. 2: Assembly of Okta 8000 G ATEX 20
Fig. 3: Functional diagram Okta G 21
Fig. 4: Transporting the vacuum pump using a belt 23
Fig. 5: Dismantle the fittings to vent the vacuum pump 24
Fig. 6: Filling with lubricant 26
Fig. 7: Sealing agent container for axial face seal 27
Fig. 8: Loading capacity of the connection flange 28
Fig. 9: Roots pump with tubular gas cooler 30
Fig. 10: Cooling water connection at the gas cooler 31
Fig. 11: Temperature monitoring 33
Fig. 12: Delta connection for low voltage 35
Fig. 13: Star circuit for high voltage 35
Fig. 14: Check of direction of rotation 35
Fig. 15: Connection example with PTC thermistor tripping unit 36
Fig. 16: Shaft alignment for roots pumps with conventional motor 37
Fig. 17: Position of the vibration sensors 41
Fig. 18: Changing the lubricant 48
Fig. 19: Okta 8000 G ATEX 59
List of figures
6/62

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
Document Number
Declaration of conformity Part of this document
Technical information on the thermometer Supplier document
Installation instructions for axial face seal Supplier document
1.1.2 Variants
According to identification of the motor:
●Okta 8000 G ATEX, 3/3G
●Okta 8000 G ATEX, 3/-G
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. ...
About this manual
7/62

1.3.2 Pictographs
Pictographs used in the document indicate useful information.
Note
Tip
1.3.3 Stickers on the product
This section describes all the stickers on the product along with their meaning.
Mod.: Okta 8000 G ATEX
Weight: XXXX kg
3
D-35641 Asslar
Made in Germany
Mod.-No.: PP G80 ...
n: max. 2250 1/min Oil: P3 21.0 l
S(N): max. 12000 m /h
04/2020
II 3/3G Ex h IIC T3 Gc X
Ser. -No.: 1234567895
+ 5°C T + 40°C
a
=
<=
<
Rating plate (example)
The rating plate is located on the front side above the
sight glass
Warning hot surface
This sticker warns of injuries caused by high tempera-
tures in case of touching without protection during oper-
ation.
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)
Before commissioning, fill the gear and bearing cham-
bers with lubricant
Achtung!
nur mit D1 befüllen
Attention!
only D1 to be used
Sticker (blue) – special lubricant only
Caution: fill with D1 only
Tbl. 1: Stickers on the product
About this manual
8/62

123
4
5
Fig. 1: Position of the stickers on the product
1 Direction of rotation arrow (cast in pump housing) 4 D1 lubricant note
2 Hot surface warning sign 5 Fill lubricant note
3 Rating plate
1.3.4 Abbreviations
Abbreviation Explanation
Okta "G" Gas circulation cooled roots pump
SIL Safety Integrity Level in accordance with safety standard DIN EN 61508
EPL Equipment Protection Level
HART Highway Addressable Remote Transducer
FKM Fluorinated rubber
PTC Temperature-dependent resistor (Positive Temperature Coefficient)
nRotation speed [Hz]
PE Earthed conductor (protective earth)
PN Nominal pressure stage (pressure nominal)
ISO International Organization for Standardization
DIN German Institute for Standardization (Deutsches Institut für Normung)
fRotation speed value of a vacuum pump (frequency, in rpm or Hz)
WAF width across flats
OI Operating instructions
SI Service instructions
Tbl. 2: Abbreviations used
1.4 Trademark proof
●Loctite® is a registered trade mark of HENKEL IP & HOLDING GMBH.
●Anderol® is a registered trade mark of Royal Lubricants Inc., East Hanover N.J., US
●Shell Morlina® is a registered trade mark of SHELL BRANDS INTERNATIONAL AG, 6340, CH
About this manual
9/62

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
DANGER
Risk of explosion from electrostatic charging during transport
There is a risk of fatalities when transporting packaging material (foil) and plastic containers in poten-
tially explosive areas. Ignition can cause very serious injuries, and even fatalities.
►Only unpack the vacuum pump outside of potentially explosive areas.
DANGER
Risk of explosion when carrying out installation and maintenance work in potentially explo-
sive areas
There is a risk of explosion if unsuitable tools are used in potentially explosive areas. Ignition can
cause very serious injuries.
►Transport, installation and maintenance work may not be performed in potentially explosive at-
mospheres.
►Always shut down the vacuum pump before commencing any work.
Safety
10/62

WARNING
Risk of serious injury from swinging, toppling or falling objects
During transport, there is a risk of crushing and impact on swinging, toppling or falling objects. There
is a risk of injuries to limbs, up to and including bone fractures and head injuries.
►Secure the danger zone if necessary.
►Pay attention to the center of gravity of the load during transport.
►Ensure even movements and moderate speeds.
►Observe safe handling of the transport devices.
►Avoid sloping attachment aids.
►Never stack products.
►Wear protective equipment, e.g. safety shoes.
Risks during installation
DANGER
Danger to life from electric shock
Contact with exposed and live elements generate an electric shock. Incorrect connection of the mains
supply leads to the risk of live housing parts that can be touched. 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, do a PE conductor check.
WARNING
Risk of fatal injury due to electric shock on account of incorrect installation
The device's power supply uses life-threatening voltages. Unsafe or improper installation can lead to
life-threatening situations from electric shocks obtained from working with or on the unit.
►Ensure safe integration into an emergency off safety circuit.
►Do not carry out your own conversions or modifications on the unit.
WARNING
Risk of crushing from rotating parts
Fingers and hands may be caught by rotating pistons within the connection flange. This results in se-
vere injuries.
►Keep limbs out of the reach of the roots pump.
WARNING
Risk of scalding from suddenly escaping hot cooling water
The cooling water connections are open to both sides. When connecting the cooling water supply,
there is a risk of scalding from the sudden escape of overpressurized hot water.
►Prior to installation, ensure that pressure is discharged from the cooling water system, and that it
is cooled down.
►Wear protective equipment, e.g., safety goggles and gloves.
CAUTION
Risk of injury from loss of stability
During setup, there is a risk of injury from tipping, if the vacuum pump is not anchored on the stand-
ing surface.
►Secure the vacuum pump using suitable lifting gear.
►Wear personal protective equipment.
Safety
11/62

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.
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.
Risks during operation
WARNING
Risk of explosion when the ignition temperature of the pumped medium is reached
If the prescribed temperature monitoring is not in place, the gas temperature in the fore-vacuum
flange can exceed the temperature class limit. In the worst case, it can result in ignition in the suction
chamber.
►You must continually monitor the gas temperature in the fore-vacuum flange.
►Operate the roots pump only if the temperature measurement is functioning.
►When a gas temperature of 140 °C is reached, switch the roots pump off (zero potential).
WARNING
Risk of injury due to the bearing bursting after overheating
During longer operation with defective bearings, there is a risk of explosion due to hot surfaces if
there is a potentially explosive atmosphere.
►Perform a vibration measurement at the defined measuring points at the prescribed time inter-
vals.
►Switch the roots pump off if process-independent trend changes of characteristic variables occur.
WARNING
Risk of crushing on rotating parts when reaching into the open flange
The pistons continue to run in the vacuum after switching off the motor, and can trap fingers and
hands within their reach.
►Wait until the vacuum pump comes to a complete standstill.
►Secure the vacuum pump against re-start.
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.
Safety
12/62

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.
►Provide suitable touch protection.
CAUTION
Health hazard from increased noise emission
Remaining in the close proximity of the vacuum pump for a sustained period of time may cause hear-
ing damage.
►Ensure adequate sound insulation.
►Wear hearing protection.
Risks during maintenance, decommissioning, recycling and malfunctions
DANGER
Risk of explosion when carrying out installation and maintenance work in potentially explo-
sive areas
There is a risk of explosion if unsuitable tools are used in potentially explosive areas. Ignition can
cause very serious injuries.
►Transport, installation and maintenance work may not be performed in potentially explosive at-
mospheres.
►Always shut down the vacuum pump before commencing any work.
DANGER
Risk of explosion from electrostatic charging during transport
There is a risk of fatalities when transporting packaging material (foil) and plastic containers in poten-
tially explosive areas. Ignition can cause very serious injuries, and even fatalities.
►Only unpack the vacuum pump outside of potentially explosive areas.
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 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.
WARNING
Risk of crushing from rotating parts
Fingers and hands may be caught by rotating pistons within the connection flange. This results in se-
vere injuries.
►Keep limbs out of the reach of the roots pump.
Safety
13/62

WARNING
Health hazard and environmental damage from toxic contaminated lubricant
Toxic process media can cause lubricant contamination. When changing the lubricant, there is a
health hazard due to contact with poisonous substances. Illegal disposal of toxic substances causes
environmental damage.
►Wear suitable personal protective equipment when handling these media.
►Dispose of the lubricant according to locally applicable regulations.
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
Scalding from hot lubricant
Danger of scalding when draining lubricant if it comes into contact with the skin.
►Wear protective equipment.
►Use a suitable collection receptacle.
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
►Do not expose body parts to the vacuum.
►Observe the safety and accident prevention regulations, if necessary wear personal protective
equipment.
►Check all safety measures at regular intervals.
►Always ensure a secure connection to the earthed conductor (PE), protection class I.
►During operation, make sure that plug-and-socket connections are securely fitted.
►Never operate the vacuum pump with open vacuum flange.
►Never make your own conversions or modifications to the vacuum pump.
►Before returning the vacuum pump, observe the notes in the chapter Service.
2.4 ATEX classification and safety measures
Vacuum pumps of the ATEX series are specially designed and manufactured to comply with the re-
quirements of Directive 2014/34/EU regarding the proper use of equipment and protective systems in
potentially explosive areas.
Safety
14/62

●With ATEX-certified motor:
II 3/3G Ex h IIC T3 Gc X +5 °C ≤ Ta ≤ +40 °C
●A part of the product does not comply with the ATEX Directive, and cannot therefore be used in
potentially explosive areas (e.g. roots pump without ATEX-certified motor):
II 3/-G Ex h IIC T3 Gc X +5 °C ≤ Ta ≤ +40 °C
2.4.1 Labeling of the vacuum pump
Classifica-
tion
Description
Device
group Devices which can be used for applications in potentially explosive atmospheres are divided into two groups:
Device group I: Devices for mines susceptible to firedamp (will not be discussed in
any more detail here)
Device group II: Devices for all other potentially explosive areas with the exception of
underground operations in mines and their surface installations which are susceptible
to hazardous firedamp and / or combustible dust.
Device cate-
gory Device group II is divided into three categories which vary in their respective degree of safety.
Devices of Device category 1 are designed to guarantee an extremely high degree
of safety. They must guarantee the necessary degree of safety even if malfunctions
occur only rarely on the device.
Devices of Device category 2 are designed to guarantee a high degree of safety.
They must guarantee the necessary degree of safety even with regular occurrences
of malfunctions or fault conditions which are generally to be expected.
Devices of Device category 3 are designed to guarantee a normal degree of safety.
They guarantee the necessary degree of safety for normal operation.
Combustible
materials G: Gases or vapors
D: Dust (will not be discussed in any more detail here)
Note: The device may only be used in atmospheres susceptible to explosion
due to gases or vapors. Operation in dust-charged, potentially explosive atmos-
pheres is not permitted.
Type of pro-
tection Identification code “Ex h” designated in the standard DIN EN ISO 80079-36 for non- electrical equipment. A protection type established for electrical equipment is not
used.
Explosion
groups Gases and vapors are divided into three Explosion groups based on their particular ignition capability (IIA, IIB and IIC). The ignition power in this regard decreases from
Explosion group IIA to IIC. (The higher Explosion group, e.g. IIC incorporates the re-
spectively lower IIB and IIA).
Temperature
class Classification of equipment depending on their maximum surface temperature, in ac- cordance with assignment as follows:
Temperature class --> Maximum surface temperature/gas temperature:
● T1 --> +450 °C
● T2 --> +300 °C
● T3 --> +200 °C
● T4 --> +135 °C
● T5 --> +100 °C
● T6 --> +85 °C
The temperature class and the actual maximum surface temperature of the equip-
ment includes a safety margin to the minimum ignition temperature of the potentially
explosive atmospheres as stipulated in DIN EN ISO 80079-36.
EPL accord-
ing to
EN 60079
Equipment protection level
EPL Ga: Equipment with “extremely high” protection level for use in potentially explo-
sive gas atmospheres in which no risk of ignition exists during normal operation, with
foreseeable or infrequent faults/malfunctions.
EPL Gb: Equipment with “high” protection level for use in potentially explosive gas at-
mospheres in which no risk of ignition exists during normal operation, with foreseea-
ble faults/malfunctions.
EPL Gc: Equipment with “extended” protection level for use in potentially explosive
gas atmospheres in which no risk of ignition exists during normal operation.
Safety
15/62

Classifica-
tion
Description
X Special operating conditions must be observed! Special conditions and notes in the
operating instructions apply.
Ta Permissible ambient temperature for operation of the vacuum pump prescribed on the
rating plate.
Tbl. 3: ATEX designations
2.4.2 Potential hazards
The ignition hazard assessment for the roots pumps in the ATEX series was performed in accordance
with the harmonized standard ISO 80079-36 (Non-electrical equipment for explosive atmospheres - Ba-
sic method and requirements). This assessment includes the identification of hazards described as fol-
lows which will not occur if the system is operated properly with the respective safety measures.
Potential haz-
ard
Occurrence due to Safety measures
Hot surfaces Heating up of compo-
nents due to compres-
sion work and friction
When used as intended, all surface temperatures are
below the measuring gas temperature in the exhaust
channel.
Hot gases Compression of the re-
quired gases ● Measure the gas temperature in the exhaust chan- nel using the supplied thermometer and evaluate
the temperatures.
● Note the information in the operating instructions of
the thermometer.
Mechanical
sparks Contact of the pistons in the suction chamber The air gaps for the maximum gas temperature are de- signed taking into account a safety factor.
Electrical
sparks
(depending on
the respective
outer zone)
Electric motor Use of an explosion protected electric motor is prescri-
bed for potentially explosive atmospheres on the out-
side.
● Observe the marking on the motor rating plate.
Static electricity Vacuum pump not
earthed ● Integrate the vacuum pump in the equipotential bonding at the installation location.
Chemical reac-
tion Between the process gas and lubricant or be-
tween the process gas
and components that
are part of the housing
● Evaluate the process and avoid hazardous process
conditions.
Zone entrain-
ment due to leaky vacuum pump The vacuum pump underwent a final inspection with leak test within the framework of a production control.
Tbl. 4: Potential hazards
2.4.3 Safety measures
►Observe and implement the following safety measures for safe operation of the roots pump in ac-
cordance with the respective device category:
Place Measures/safety equipment Category 3
Specification recom-
mended
Piston bear-
ing Regular vibration measurement at the defined measur- ing points and required time intervals x
Gas outlet
temperature Monitor the gas outlet temperature with the supplied thermometer (see chapter “Setting and checking the
temperature monitoring”, page 32).
x
Tbl. 5: Measures and safety equipment
Safety
16/62

2.5 Product usage limits
Installation location ● Indoors, protected against:
─ dust deposits
─ falling objects
─ fire-fighting water
● Outdoors, protected against:
─ falling objects
─ direct influence of weather such as rain, splash wa-
ter, strong drafts and sunlight
─ fire-fighting water
─ lightning strike
Installation altitude according to the motor used. Observe the operating instruc-
tions of the motor manufacturer!
Ambient temperature +5 °C to +40 °C
Relative air humidity max. 85 % (depending on the motor version)
Orientation Horizontal
Pumped medium intake temperature,
max. ≤ 40 °C
Permanent intake pressure in circula-
tion mode < 1300 hPa (abs.)
Max. speed in circulation mode 1000 – 2250 rpm
Permanent intake pressure in vacuum
mode depending on max. pressure differential
Max. gas temperature, pressure side 140 °C
Tbl. 6: Permissible ambient conditions
2.6 Proper use
►Only use the vacuum pump to create a vacuum in connection with a suitable backing pump.
►To protect the lubricant, use sealing gas if media with a high boiling point or corrosive media (e.g.
solvents) are being pumped.
►Adhere to the installation, commissioning, operating, and maintenance instructions.
►Use only accessory parts recommended by Pfeiffer Vacuum.
►Use the vacuum pump to convey potentially explosive atmospheres in accordance with the label-
ing.
►Observe the corresponding safety measures (see chapter “Safety measures”, page 16).
►Operate the vacuum pump within the application limits of the product (see chapter “Product usage
limits”, page 17) and in compliance with the technical data.
–When operating the vacuum pump with frequency converter, make sure that the vacuum
pump never exceeds the max. permissible rotation speed, even in the event that the frequen-
cy converter malfunctions. Increased bearing wear is therefore avoided.
–When operating the pump with frequency converter, the vacuum pump must be operated at
minimum speed. This will prevent increased wear of the axial face seal as a result of a lack of
lubrication.
2.7 Foreseeable improper use
Improper use of the product invalidates all warranty and liability claims. Improper use is any, even unin-
tended, use, which is contrary to the product purpose; and in particular:
●Pumping media that can corrode or not be withstood by the vacuum pump materials
Components that form part of the suction chamber are made of stainless steel. Seals are FPM
(alternative seals available on request)
●Pumping media that introduce an ignition source to the suction chamber
●Pumping media that form adhesive deposits inside the suction chamber and cause the pistons to
touch or jam
●Pumping pressurized media (> atmospheric pressure)
●Pumping fluids – the use of fluids is permitted for cleaning purposes
●Pumping radioactive media
Safety
17/62

●Pumping media prone to spontaneous, specific exothermic reactions
●Use of the vacuum pump for cyclic evacuation procedures above atmospheric pressure (load
lock)
●Using the vacuum pump in systems in which sporadic loads and vibrations or periodic forces act
on the unit
●Using the vacuum pump in strong electrical, magnetic, or electromagnetic fields
●Use of the vacuum pump with open vacuum and/or fore-vacuum flange open to the atmosphere
●Using lubricants not specified by Pfeiffer Vacuum
●Using pipes to lift the vacuum pump
●Use of accessories or spare parts that are not listed in these instructions
●Using lubricants not specified by Pfeiffer Vacuum
●Using the vacuum pump as a climbing aid
●Overcoating the vacuum pump whereby the permissible layer thicknesses in accordance with
DIN EN ISO 80079-36 are exceeded
●Use of mineral-based operating fluids, such as P3, with an oxygen concentration > 21 %
Mineral-based operating fluids are combustible and ignite at high temperatures, and when they
come into contact with pure oxygen. These operating fluids oxidize heavily and thus lose their lu-
bricating 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.
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.
Safety
18/62

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
19/62

3 Product description
3.1 Function
The gas circulation-cooled roots pumps of the OktaLine "G" series can be used for high differential
pressures and compression ratios. Operation with a backing pump connected upstream enables com-
pressing against atmospheric pressure.
The operating principle of the roots pump is based on 2 synchronous pistons that rotate in a housing
without touching. The pumping effects arise as a result of the opposing rotation of the 2 figure-of-eight
shaped rolling pistons. While suction chambers are formed between the rolling pistons and the housing,
the rolling pistons continuously form a mutual seal without touching each other or the housing. A pair of
gears positioned on the extended shaft ends, causes the opposing, synchronous running of the roots
pistons. Lubrication is limited to the two bearing and gear chambers which are arranged separately from
the suction chambers.
Roots pumps of the ATEX series are equipped with a thermometer.
14
10
32 65
8
15 7
11
12
1314 9
Fig. 2: Assembly of Okta 8000 G ATEX
1 Vacuum flange 9 Sight glass (2×)
2 Measurement connection, vacuum flange 10 Axial face seal
3 Lubricant filling plug (2×) 11 Sight glass
4 Cooling gas connection (2×) 12 Lubricant drain plug
5 Eye bolt (2×) 13 Measurement connection, fore-vac-
uum flange
6 Ball valve for filling with nitrogen during transport and
storage 14 Sealing gas connection (4×)
7 Thermometer 15 Lubricant drain plug
8 Fore-vacuum flange
Product description
20/62