SKF ATEX RA Series User manual

Version 01
951-180-082-EN
EN
Operating instructions
according to ATEX Directive 2014/34/EU
ATEX multiline pumps of series RA

Jürgen Kreutzkämper
Manager R&D Germany
Stefan Schürmann
Manager R&D Hockenheim/Walldorf
EU Declaration of Conformity pursuant to ATEX Directive 2014/34/EU, Annex X
The manufacturer, SKF Lubrication Systems Germany GmbH, Hockenheim Plant, 2. Industriestr. 4, DE - 68766 Hockenheim hereby de-
clares the conformity of the device:
Designation: Multiline pumps
Type: RA...EEX
Part number: 750-***-*
Year of manufacture: See rating plate
Explosion protection marking:
II 2G Ex h IIC T4 Gb / II 2D Ex h IIIC T135°C Db
with all essential safety and health requirements of ATEX Directive 2014/34/EU as well as the basic safety and health requirements protec-
tion requirements of Machinery Directive 2006/42/EC specified below at the time of placing on the market.
1.1.2 · 1.1.3 · 1.3.2 · 1.3.4 · 1.5.6· 1.5.8 · 1.5.9 · 1.6.1 · 1.7.1 · 1.7.3 · 1.7.4
The technical documentation pursuant to:
ATEX Directive 2014/34/EU Annex VIII No. 2 has been prepared and filed with the conformity assessment body.
- Machinery Directive 2006/42/EC Annex VII Part B.
We undertake to transmit these in electronic form in response to a reasoned request by the national authorities. The Head of Technical
Standards is the authorized representative for the technical documentation. See the manufacturer information for the address.
Furthermore, the following Directives and (harmonized) standards were applied in the applicable areas:
2014/30/EU EMC Directive | Industrie / 2011/65/EU RoHS II
Standard Edition Standard Edition Standard Edition Standard Edition
EN ISO 80079-36 2016 EN 1127-1 2011 DIN EN 809 2012 EN ISO 12100 2010
EN ISO 80079-37 2016 DIN EN 60204-1 2007 DIN EN 60034-1 2011
The device must not be put into service until the machinery into which it is to be incorporated has been declared in conformity with the
provisions of ATEX Directive 2014/34/EU, Machinery Directive 2006/42/EC, and all other applicable Directives.
Hockenheim, September 17, 2018
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951-180-082-EN
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EN EU Declaration of Conformity

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Masthead
Training
SKF conducts detailed training in order to
enable the maximum safety and efficiency.
SKF recommends taking advantage of this
training. For information, contact the rel-
evant SKF service address.
Copyright
© Copyright SKF
All rights reserved.
Warranty
The instructions do not contain any infor-
mation on the warranty. This can be found
in our General Terms and Conditions.
Notes on operating instructions
These operating instructions are operat-
ing instructions in accordance with ATEX
2014/34/EU. The instructions are an in-
tegral part of the described products and
must be kept for future use.
Disclaimer of liability
The manufacturer shall not be held liable for
damage resulting from:
○Improper usage, assembly, operation,
configuration, maintenance, repair, or
accidents
○Improper reaction to malfunctions
○Unauthorized modifications to the
product
○Intentional or gross negligence
○Use of non-original SKF spare parts
The maximum liability for loss or damage
resulting from the use of our products is
limited to the purchase price. Liability for in-
direct damage of any kind is excluded.
Masthead
Manufacturer
SKF Lubrication Systems Germany GmbH
Address of manufacturer plants
Headquarters
Walldorf Plant
Heinrich-Hertz-Str. 2-8
69190 Walldorf
Germany
Tel: [phone]
Fax: [phone]
Berlin Plant
Motzener Strasse 35/37
12277 Berlin
Germany
Tel. [phone]
Fax [phone]
Hockenheim Plant
2. Industriestrasse 4
68766 Hockenheim
Germany
Tel. [phone]
Fax [phone]
E-mail: [e-mail]
www.skf.com/lubrication

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951-180-082-EN
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EN Table of contents
Table of contents
EU Declaration 2
Masthead 3
Explanation of symbols and signs 7
1. Safety instructions 9
1.1 General safety instructions 9
1.2 General behavior when handling the product 9
1.3 Intended use 10
1.4 Foreseeable misuse 10
1.5 Painting plastic components 11
1.6 Modifications to the product 11
1.7 Prohibition of certain activities 11
1.8 Inspections prior to delivery 11
1.9 Referenced documents 11
1.10 Markings on the product 13
1.11 Notes on the rating plate 14
1.12 Note on CE marking 14
1.13 Persons authorized to use the product 14
1.13.1 Operator 14
1.13.2 Qualified mechanic 15
1.13.3 Qualified electrician 15
1.13.4 Specialist in maintenance and servicing in potentially
explosive atmospheres 15
1.14 Instruction of outside fitters 15
1.15 Provision of personal protective gear 15
1.16 Operation 15
1.17 Emergency shutdown 16
1.18 Transport, assembly, maintenance, malfunction, repair,
shutdown, disposal 16
1.19 First start-up, daily start-up 18
1.20 Cleaning 18
1.21 Protective and safety mechanisms 18
1.22 Special safety instructions regarding explosion protection 19
1.23 Nullification of ATEX approval 21
1.24 Operation in potentially explosive atmospheres 21
1.26 Obligations of the operator 22
1.26.1 Identification of hazards 22
1.26.2 Explosion protection measures 22
1.25 Explosion protection marking 22
1.26.3 Provision of necessary information 23
1.26.4 Duty to provide instruction and training 23
1.27 Residual risks 24
1.28 Residual ATEX risks 25
2. Lubricants 27
2.1 General information 27
2.2 Selection of lubricants 27
2.3 Material compatibility 28
2.4 Aging of lubricants 28
2.5 Lubricants in potentially explosive atmospheres 28
3. Overview, functional description 29
3.1 Assembly 29
3.2 Functional description 32
3.3 Operation of the RA multline pump 33
4. Technical data 35
4.1 Design with rotary drive 35
4.1.1 Rotary, coaxial (RA1UA) 35
4.1.2 Rotary with coaxial gear (RA2UB) 35
4.1.3 Rotary with bevel gear (RA3UA) 35

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4.1.4 Explanation of order codes for rotary drive (RA1UA) 37
4.1.5 Explanation of order codes for rotary drive with
coaxial gear (RA2UB) 37
4.1.6 Explanation of order codes for rotary drive with
bevel gear (RA3UA) 38
4.2 Design with electric motor drive 39
4.2.1 Electric motor drive, coaxial (RA1M) 39
4.2.2 Electric motor drive, with coaxial gear (RA2M) 39
4.2.3 Electric motor drive, with bevel gear (RA3M) 39
4.2.4 Explanation of orders codes for electric motor drive,
coaxial (RA1M) 43
4.2.5 Explanation of order codes for electric motor drive with
coaxial gear (RA2M) 44
4.2.6 Explanation of order codes for electric motor drive with
bevel gear (RA3M) 45
4.3 Design with rotary drive, with grease reservoir 46
4.3.1 Rotary drive, with bevel gear and grease reservoir (RA...3UA) 46
4.3.2 Explanation of order codes for rotary drive,
with bevel gear and grease reservoir (RA...3UA) 47
4.4 Design with electric motor drive, with grease reservoir 48
4.4.1 Electric motor drive, with coaxial gear and
grease reservoir (RA...2M) 48
4.4.2 Electric motor drive, with bevel gear and
grease reservoir (RA...3M) 48
4.4.3 Explanation of order codes for electric motor drive,
with coaxial gear and grease reservoir (RA...2M) 50
4.4.4 Explanation of order codes for electric motor drive,
with bevel gear and grease reservoir (RA...3M) 51
4.5 Fill level control 52
4.5.1 Fill level control for grease with changeover function K (E) 52
4.5.2 Fill level switch with NC/NO function for grease (F) 52
4.6 Tightening torques 52
5. Supply, returns, storage 53
5.1 Supply 53
5.2 Return shipment 53
5.3 Storage 53
5.3.1 Corrosion protection 54
5.3.2 Special storage conditions for motors 54
6. Assembly 55
6.1 General information on assembly 55
6.2 Assembly location 56
6.2.1 Minimum mounting dimensions 56
6.3 RA oil and grease lubrication pumps 57
6.3.1 Rotary drive, coaxial (RA1UA) 57
6.3.2 Rotary drive, with coaxial gear (RA2UB) 58
6.3.3 Rotary drive, with bevel gear (RA3UA) 59
6.3.4 Electric motor drive, coaxial (RA1M) 60
6.3.5 Electric motor drive, with coaxial gear (RA2M) 61
6.3.6 Electric motor drive, with bevel gear (RA3M) 62
6.4 RA grease lubrication pumps with grease reservoir 63
6.4.1 Rotary drive, with bevel gear and grease reservoir (RA...3UA) 63
6.4.2 Electric motor drive, with coaxial gear and
grease reservoir (RA...2M) 64
6.4.3 Electric motor drive, with bevel gear and
grease reservoir (RA...3M) 65
6.5 Assembly of RA multiline pumps 66

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6.5.1 RA rotary drive 66
6.5.2 RA electric motor drive 67
6.6 Electrical connection 68
6.6.1 Establish the motor connection 70
6.6.2 Establishing equipotential bonding connection 71
6.7 Electrical connection of fill level controls 72
6.7.1 Connection for fill level control K (E) 73
6.7.2 Fill level control F 73
6.8 Lubrication lines 74
6.8.1 Lubrication line arrangement 74
6.8.2 Connection of the lubrication lines 75
7. First start-up 76
7.1 Conduct an insulation test 76
7.2 Venting the RA multiline pump and lubricant lines 77
7.2.1 Venting an RA grease multiline pump 78
7.2.2 Venting an RA oil multiline pump 79
7.3 Adjusting the displacement using displacement chart
and continuous operating pressure 80
7.4 Inspections before first start-up 83
7.5 Inspections during first start-up 83
8. Operation 84
8.1 Filling with lubricant (RAxxx3UA; RAxxx2M; RAxxx3M) 84
9. Cleaning 85
9.1 Cleaning agents 85
9.2 Exterior cleaning 86
9.3 Interior cleaning 86
9.4 RA multiline pump units with electric motor drive 86
10. Maintenance 87
10.1 RA multiline pump units with electric motor drive 87
10.2 General maintenance instructions 87
10.3 Electric motor maintenance schedule 90
11. Malfunctions, causes, and remedies 91
12. Repairs 92
11.1 Malfunctions on the fill level control / the fill level switch 92
13. Shutdown, disposal 93
13.1 Temporary shutdown 93
13.2 Permanent shutdown, disassembly 93
13.3 Disposal 93
14. Accessories 94
15. Appendix 95
15.1 Declaration of Conformity for motor, manufacturer VEM 95
15.2 Associated supplier documentation 97

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Explanation of symbols, signs, and abbreviations
Explanation of symbols and signs
General warning Risk of electrical shock Risk of slipping Hot surfaces
Being drawn into machinery Crushing hazard Pressure injection Suspended load
Electrostatic sensitive
components
Potentially explosive
atmosphere Disposal, recycling
Wear personal protective gear
(goggles)
Wear personal protective gear
(face mask)
Wear personal protective gear
(gloves)
Wear personal protective
gear (protective clothing)
Wear personal protective gear
(protective footwear) Unlock the product General notes Disposal of waste electrical and electronic equipment
Warning level Consequence Probability Symbol Meaning
DANGER Death, serious injury Immediate Chronological instructions
WARNING Death, Serious injury Possible ¡Bullet list items
CAUTION Minor
injury Possible Indicates the requirements that must be met for the actions
described in the following
IMPORTANT NOTE Property damage Possible

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951-180-082-EN
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EN Explanation of symbols, signs, and abbreviations
Abbreviations and conversion factors
re regarding °C degrees Celsius °F degrees Fahrenheit
approx. approximately K Kelvin Oz. ounce
i.e. that is N Newton fl. oz. Fluid ounce
etc. et cetera h hour in. inch
incl. including s second psi pound per square inch
min. minimum d day sq.in. square inch
max. maximum Nm Newton meter cu. in. cubic inch
min minute ml milliliter mph miles per hour
etc. et cetera ml/d milliliters per day rpm revolutions per minute
e.g. for example ccm cubic centimeter gal. gallon
kW kilowatt mm millimeter lb. pound
U voltage l liter hp horsepower
R Resistance db (A) sound pressure level kp kilopound
I current intensity > greater than fpsec feet per second
V volt < less than Conversion factors
Wwatt ± plus minus Length 1 mm = 0.03937 in.
AC alternating current Ø diameter Area 1 cm² = 0.155 sq.in.
DC direct current kg kilogram Volume 1 ml = 0.0352 fl.oz.
A ampere RH relative humidity 1 l = 2.11416 pints (US)
Ah ampere hour approximately Mass 1 kg = 2.205 lbs
Hz Frequency (Hertz) = equal to 1 g = 0.03527 oz.
NC normally closed contact % percent Density 1 kg/cm³ = 8.3454 lb./gal(US)
NO normally open contact ‰ per mil (thousandth) 1 kg/cm³ = 0.03613 lb./cu.in.
greater or equal Force 1 N = 0.10197 kp
less or equal Pressure 1 bar = 14.5 psi
mm2square millimeter Temperature °C = (°F-32) x 5/9
rpm Revolutions per minute Power 1 kW = 1.34109 hp
Acceleration 1 m/s² = 3.28084 ft./s²
Speed 1 m/s = 3.28084 fpsec
1 m/s = 2.23694 mph

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1. Safety instructions
1.1 General safety instructions
○The operator must ensure that the in-
structions are read by all persons tasked
with working on the product or who
supervise or instruct such persons. The
operator must also ensure that the staff
fully understands the content of the in-
structions. Putting the products into op-
eration or operating them without having
read the instructions is prohibited.
○Retain the instructions for further use.
○The products described here were
manufactured according to the state of
the art. Risks may, however, arise from
non-compliant usage and may result in
personal injury or damage to material
assets.
○Any malfunctions which may affect safety
must be remedied immediately. In ad-
dition to these instructions, the statu-
tory regulations for accident prevention
and environmental protection must be
observed.
1.2 General behavior when handling the
product
○The product may only be used in aware-
ness of the potential dangers, in proper
technical condition, and according to the
information in this manual.
○Familiarize yourself with the functions
and operation of the product. The speci-
fied assembly and operating steps and
their sequences must be observed.
○Any unclear points regarding proper con-
dition or correct assembly/operation must
be clarified. Operation is prohibited until
issues have been clarified.
○Unauthorized persons must be kept
away.
○Wear personal protective equipment.
○All safety regulations and in-house in-
structions relevant to the particular activ-
ity must be observed.
○Responsibilities for different activities
must be clearly defined and observed.
Uncertainty seriously endangers safety.
○Protective and safety mechanisms must
not be removed, modified, nor disabled
during operation and must be checked
for proper function and completeness at
regular intervals.
○If protective and safety mechanisms must
be removed, they must be reinstalled
immediately following conclusion of work
and then inspected for proper function.
○Any malfunctions that occur must be
resolved according to responsibility. The
supervisor must be notified immediately
in case of malfunctions outside one's in-
dividual scope of responsibility.
○Never use any part of the centralized
lubrication system as a stand or step or
for climbing.

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1.3 Intended use
Intended use is the use of the RA multiline
pump for the purpose of providing central-
ized lubrication.
The RA multiline pump is constructed as a
radial piston pump in a modular design. Up
to five pump elements each with one, two,
or four outlets can be “stacked” together. The
displacement of the outlets is continuously
variable (stepless adjustment) from outside.
The pump is suitable for use as a feed pump
for total loss lubrication systems or for circu-
lating lubrication systems with low circula-
tion rates (up to 30 cm3/min per outlet) or
as a multicircuit pump to supply multiple
independent lubrication zones.
Its operating pressure is max. 63 bar, with
up to 100 bar for short periods. The design
of the RA multiline pump permits it to pump
both oils and greases on mineral oil and syn-
thetic basis. Lubricants are fed in compliance
with the specifications, technical data, and
limits presented in this manual.
Usage is permitted exclusively in the context
of commercial or business activity by profes-
sional users.
○Use in areas with damaging radiation
(e.g., ionizing radiation)
○Use to feed, forward, or store hazardous
substances and mixtures as defined in
Annex I Part 2-5 of the CLP Regulation
(EC 1272/2008) that are marked with
hazard pictograms
GHS01-GHS 09
○Use to feed / forward / store gases, lique-
fied gases, dissolved gases, vapors, or
fluids whose vapor pressure exceeds nor-
mal atmospheric pressure (1013 mbar)
by more than 0.5 bar at their maximum
permissible operating temperature
○Use to feed, forward, or store lubricants
containing volatile solvents
○Use in potentially explosive gases and
vapors whose ignition temperature is
less than 125% of the maximum surface
temperature
Third-party products, such as ATEX motors
or drives, attached to a rotary RA multline
pump must be recommended or approved
by the manufacturer.
1.4 Foreseeable misuse
Any usage of the product other than as
specified in this manual is strictly prohibited.
Particularly prohibited are:
○Use outside the specified operating tem-
perature range
○Use of non-specified equipment
○Use without a pressure regulating valve -
maximum opening pressure 90 bar
○Use in continuous operation
○Use in areas with aggressive, corrosive
substances (e.g., high ozone loads)

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1.6 
Unauthorized modifications and changes
can have an unpredictable effect on safety.
Unauthorized modifications and changes are
therefore prohibited.
1.7 Prohibition of certain activities
The following activities must be performed
only by employees of the manufacturer or
persons authorized by the manufacturer due
to possibly undetectable sources of error or
due to statutory requirements:
○Repairs, modifications to the drive
○Replacement or modifications to pump
elements
○Use in potentially explosive dusts whose
minimum ignition temperature and glow
temperature are less than 150% of the
maximum surface temperature
○Use in another, more critical explosion
protection zone than specified on the
pump's rating plate
○Use with a missing, damaged, or improp-
erly performed subsequent finish The
finish must meet the requirements of
standards applicable to ATEX.
1.5 Painting plastic components
The painting of all plastic components
and seals of the products described here
is prohibited. Completely mask or remove
plastic components before painting the main
machine.
1.8 Inspections prior to delivery
The following tests were performed prior to
delivery:
○Safety and functional tests
○For electrically operated products: Elec-
trical tests according to DIN EN 60204-
1:2007, VDE 0113-1:2007
○For explosion-proof products: Inspections
pursuant to the requirements of the ATEX
Directive
1.9 Referenced documents
In addition to this manual, the following
documents must be observed by the respec-
tive target group:
○Operational instructions, approval rules
○The safety data sheet of the lubricant
used

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If necessary:
○Project planning documents
○Instructions from suppliers of purchased
parts
○Instructions for other components for
setting up the centralized lubrication
system
○Other relevant documents for integration
of the product into the main machine,
system
○The explosion protection document of the
operator

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1.10 Markings on the product
The following warning labels are affixed to
the motor-driven RA multiline pumps. Be-
fore start-up, check that the labels are pres-
ent and intact. Immediately replace warning
labels if damaged or missing. The product
must not be operated until then. See the po-
sitioning diagram for the order number and
position on the product.
Positioning of warning labels, Fig. 1
Item 2
Item 1
Warning labels on the product
Item Symbol Designation Order No.
1
Dangerous electrical voltage 44-1826-2850
2Motor rotation arrow 24-1826-2570
1 set, consisting of an arrow
and 10 PE stickers
3Equipotential bonding
connection
Item 3

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1.11 Notes on the rating plate
The rating plate provides important data
such as the model, part number, etc.
To avoid loss of this data in case the rating
plate becomes illegible, these characteristics
should be entered in the manual.
Model _______________________________
P. No. ________________________________
S. No. ________________________________
Year of manufacture (CW/YY) ___________

Made in Germany
-15°C < Ta < +40°C
KW/JJ XYZ
SKF Lubrication Systems Germany GmbH
1.12 Note on CE marking
The CE marking is based on the require-
ments of the applied Directives:
○2014/34/EU Directive for equipment and
protective systems intended for use in
potentially explosive atmospheres (ATEX)
○2011/65/EU (RoHS II) Directive on the
restriction of the use of certain hazardous
substances in electrical and electronic
equipment
Note on Low-Voltage Directive 2014/35/EU
The protection objectives of Low-Voltage
Directive 2014/35/EU are met in accordance
with Annex II, No. 1.2.7 of ATEX 2014/34/EU.
Note on Pressure Equipment Directive
2014/68/EU
Due to its performance characteristics,
the product does not reach the limit values
defined in Article 4, Paragraph 1, Subpara-
graph (a) item (i) and is, pursuant to Article
4, Paragraph 3, excluded from the scope of
Pressure Equipment Directive 2014/68/EU.
1.13 Persons authorized to use the
product
1.13.1 Operator
A person competent due to training, knowl-
edge, and experience to execute the func-
tions and activities associated with normal
operation; this also includes the avoidance
of possible hazards that may arise during
operation.

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1.13.2 
A person with appropriate technical train-
ing, knowledge, and experience who can
recognize and avoid the hazards that may
occur during transport, assembly, first start-
up, operation, maintenance, repair, and
dismantling
1.13.3 
A person with appropriate technical training,
knowledge, and experience who can recog-
nize and avoid hazards that may result from
electricity
1.13.4 Specialist in maintenance and
servicing in potentially explosive
atmospheres
This is a person competent due to qualified
technical education, training, and experience
to recognize risks and possible hazards when
working on the device or subcomponents
in potentially explosive atmospheres and to
rectify these by taking suitable actions. The
specialist has knowledge of the various types
of protection, installation procedures, and
explosive atmosphere classifications. The
specialist is familiar with the rules and re-
quirements relevant to his or her activity and
explosion protection, especially ATEX Direc-
tives 2014/34/EU and 1999/92/EC.
1.14 
Before commencing work, the operator
must inform outside fitters of the opera-
tional safety regulations, applicable accident
prevention regulations, and the functions of
the main machine and its protective devices.
1.15 Provision of personal protective gear
The operator must provide personal protec-
tive gear appropriate for the location and
intended application. This also includes ESD
clothing and ESD tools for work in a poten-
tially explosive atmosphere.
1.16 Operation
The following must be observed during first
start-up and operation:
○All information within this manual and
all information within the referenced
documents
○All laws and regulations that
the operator must observe

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1.17 Emergency shutdown
Shut down the product in an emergency by:
○Switching off the main machine in which
the product is integrated
○If necessary, pressing the on/off switch on
the main machine
1.18 Transport, assembly, maintenance, malfunction, repair, shutdown, disposal
during the work and that no limbs can be
pinched by unintended movements.
○Assemble the product only outside the
operating range of moving parts, at an
adequate distance from sources of heat
or cold. Other units of the machine, the
vehicle must not be damaged or impaired
in their function by the installation.
○Dry any wet, slippery surfaces or cover
appropriately.
○Cover hot or cold surfaces appropriately.
○Work on electrical components may be
performed only by qualified electricians.
Note possible waiting times for discharge.
Work on electrical components may be
performed only in a voltage-free state
and using tools suitable for electrical
work.
○All relevant persons must be informed of
the activity prior to the start of this work.
Precautionary operational measures,
work instructions must be observed.
○Transport only with suitable transport
and lifting gear on suitable paths.
○Maintenance and repair work can be sub-
ject to restrictions at low or high temper-
atures (e.g., altered flow properties of the
lubricant). Maintenance and repair work
should therefore preferably be performed
at room temperature.
○Prior to performing work, the product
and the machine in which the product
will be integrated must be de-energized,
depressurized, and secured against un-
authorized activation.
○
Take appropriate measures to ensure that
moving, detached parts are immobilized

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all drilling, welding, firing, and grinding
work.
○Observe any possible wearing spots. Pro-
tect components appropriately.
○All components used must be designed
for:
- The maximum operating pressure
- The maximum/minimum ambient tem-
perature
- The lubricant to be delivered
- The required ATEX zone
- The operating and ambient conditions
at the place of use.
○No parts may be subjected to torsion,
shear, or bending.
○Check parts for contamination before use
and clean if necessary.
○Lubrication lines should be filled with
lubricant prior to assembly. This simplifies
subsequent venting of the system.
○Establish the electrical connection only in
accordance with the valid circuit diagram
and in observance of the relevant regula-
tions and the local electrical operating
conditions.
○Do not touch cables or electrical compo-
nents with wet or moist hands.
○Fuses must not be bridged. Always re-
place defective fuses with fuses of the
same type.
○Ensure proper grounding of the product.
○Ensure proper connection of the protec-
tive conductor.
○Drill required holes only on non-critical,
non-load-bearing parts of the opera-
tor's machine/infrastructure. Use existing
boreholes. Do not damage lines or cables
when drilling. Modifications to SKF prod-
ucts are prohibited.This also includes
○Adhere to the specified torques. Use
a calibrated torque wrench when
tightening.
○Use suitable hoisting equipment when
working with heavy parts.
○Avoid mixing up/incorrectly assembling
disassembled parts. Label parts.

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EN 1st Safety instructions
1.19 First start-up, daily start-up
Ensure that:
○All safety mechanisms are fully present
and functional.
○All connections are properly connected.
○All parts are correctly installed.
○All warning labels on the product are fully
present, visible, and undamaged.
○Illegible or missing warning labels are im-
mediately replaced.
1.20 Cleaning
○There is a fire hazard from the use of
flammable cleaning agents. Use only
non-flammable cleaning agents that are
suitable for the intended purpose.
○Do not use corrosive cleaning agents.
○Do not use steam-jet equipment or high-
pressure cleaners. This may damage
electrical components.
Observe the IP protection class.
○Cleaning work must not be performed on
conducting components.
○Mark wet areas accordingly.
1.21 Protective and safety mechanisms
○Protective and safety mechanisms can-
not be removed, modified, nor disabled
during operation and must be checked
for proper function and completeness at
regular intervals.
○If protective and safety mechanisms must
be removed, they must be installed im-
mediately following conclusion of work
and then checked for proper function.
○The following protective and safety
mechanisms are available depending on
the equipment design of the pump:
○Sensor for fill level monitoring / mechani-
cal fill level gauge
○Overload/thermal switch for electric
motor
○Pressure regulating valves
○Equipotential bonding connection

1
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Version 01
EN
1st Safety instructions
1.22 Special safety instructions regarding explosion protection
○Always behave so as to avoid explosion
hazards.
○A written work authorization from the
operator is required prior to initiating
work in potentially explosive atmo-
spheres. Unauthorized persons must be
kept away.
○There must be no evidence that parts of
the explosion protection are missing or
non-functional. If this is not excluded,
switch off the machine and immediately
notify the supervisor.
○Explosion protection measures must
never be deactivated, changed, or
bypassed.
○Shipping damage may lead to the loss of
explosion protection. If there is apparent
shipping damage, do not install or put
into operation the product.
○The introduction of ignition sources such
as sparks, open flames, and hot surfaces
into potentially explosive atmospheres is
prohibited.
○Depending on the operating conditions,
check the product for damage that may
present a risk of ignition and check for
proper function. An inspection must be
conducted at least every 12 months.
○The ignition temperature of the sur-
rounding potentially explosive gases and
vapors must be greater than 125% of the
maximum surface temperature.
○The minimum ignition temperature and
the glow temperature and the surround-
ing potentially explosive dusts must be
greater than 150% of the maximum sur-
face temperature.
○The usage limits for explosion protection
are clearly defined in the explosion pro-
tection marking by the device categories,
gas and dust groups and temperature
classes. Light metal dusts, as a poten-
tially explosive ambient medium, are
always prohibited even when dust group
IIIc is specified.
○The operator must ensure high-reliability
fill level monitoring.
○For products without electrical fill level
control, the lubricant fill level is to be
checked at regular intervals.
○The product may be filled via the res-
ervoir lid only if there is no potentially
explosive atmosphere. Filling via the fill
connection is also possible if there is a
potentially explosive atmosphere. The

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Version 01
EN 1st Safety instructions
filling pump must be connected to the
equipotential bonding connection of the
pump.
○The product may be cleaned only if there
is no potentially explosive atmosphere.
○The lubricant’s ignition temperature
has to be at least 50 kelvin above the
maximum surface temperature of the
components.
○Repairs or modifications to explosion-
proof machinery may be performed only
by the manufacturer or a workshop rec-
ognized by a notified body and accepted
by the manufacturer. If the work is not
performed by the manufacturer itself, the
repair must be accepted and approved in
writing by a recognized expert. The repair
is marked by a repair sign on the machine
containing the following information:
- Date
- Executing company
- Type of repair
- If applicable, mark by expert
○Shipping damage may lead to the loss of
explosion protection. If there is apparent
shipping damage, do not install or put
into operation the product.
○All parts of the grounding concept must
be properly present and connected with
the main machine.
○If lifting eyes are removed after installa-
tion, seal the threaded holes according to
the protection type.
○Handle materials in such a way that no
sparks may arise from tilting, dropping,
slipping, rubbing, or striking. If necessary,
cover materials by appropriate means.
○Never disconnect any plug-in connec-
tions under electrical voltage. Secure
plug-in connections against disconnec-
tion by hand using the provided locking
clips.
○The operator must critically examine
whether operation without an empty sig-
nal results in a new hazard potential (e.g.,
due to heating of bearings on the ma-
chine being lubricated to the range of the
ignition temperature in case of lubrication
failure). If this cannot be reliably excluded,
an empty signal must be provided or
appropriate organizational measures
taken to monitor the temperature of the
bearings.
○Avoid / immediately remove any accu-
mulated dust. Accumulated dust has a
thermal insulating effect and promotes
the formation of a potentially explosive
atmosphere when agitated/swirled.
○The product must be integrated into the
operator’s lightning protection scheme.