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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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
Version 01
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
Version 01
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

1
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1st Safety instructions
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)