SKF ATEX RA Series Manuel utilisateur

Version 01

951-180-082-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

Version 01

EN EU Declaration of Conformity

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951-180-082-EN

Version 01

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.

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: +49 (0) 6227 33-0

Fax: +49 (0) 6227 33-259

Berlin Plant

Motzener Strasse 35/37

12277 Berlin

Germany

Tel. +49 (0)30 72002-0

Fax +49 (0)30 72002-111

Hockenheim Plant

2. Industriestrasse 4

68766 Hockenheim

Germany

Tel. +49 (0)62 05 27-0

Fax +49 (0)62 05 27-101

E-mail: Lubrication-germany@skf.com

www.skf.com/lubrication

- 4 -
951-180-082-EN 
Version 01
EN Table of contents
Table of contents
EU Declaration 2
Masthead 3
Explanation of symbols and signs 7
Safety instructions 9
1 General safety instructions 9
2 General behavior when handling the product 9
3 Intended use 10
4 Foreseeable misuse 10
5 Painting plastic components 11
6 Modifications to the product 11
7 Prohibition of certain activities 11
8 Inspections prior to delivery 11
9 Referenced documents 11
10 Markings on the product 13
11 Notes on the rating plate 14
12 Note on CE marking 14
13 Persons authorized to use the product 14
13.1 Operator 14
13.2 Qualified mechanic 15
13.3 Qualified electrician 15
13.4 Specialist in maintenance and servicing in potentially 
 explosive atmospheres 15
14 Instruction of outside fitters 15
15 Provision of personal protective gear 15
16 Operation 15
17 Emergency shutdown 16
18 Transport, assembly, maintenance, malfunction, repair, 
 shutdown, disposal 16
19 First start-up, daily start-up 18
20 Cleaning 18
21 Protective and safety mechanisms 18
22 Special safety instructions regarding explosion protection 19
23 Nullification of ATEX approval 21
24 Operation in potentially explosive atmospheres 21
26 Obligations of the operator 22
26.1 Identification of hazards 22
26.2 Explosion protection measures 22
25 Explosion protection marking 22
26.3 Provision of necessary information 23
26.4 Duty to provide instruction and training 23
27 Residual risks 24
28 Residual ATEX risks 25
Lubricants 27
1 General information 27
2 Selection of lubricants 27
3 Material compatibility 28
4 Aging of lubricants 28
5 Lubricants in potentially explosive atmospheres 28
Overview, functional description 29
1 Assembly 29
2 Functional description 32
3 Operation of the RA multline pump 33
Technical data 35
1 Design with rotary drive 35
1.1 Rotary, coaxial (RA1UA) 35
1.2 Rotary with coaxial gear (RA2UB) 35
1.3 Rotary with bevel gear (RA3UA) 35

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951-180-082-EN
Version 01
EN
Table of contents
1.4 Explanation of order codes for rotary drive (RA1UA) 37
1.5 Explanation of order codes for rotary drive with 
coaxial gear (RA2UB) 37
1.6 Explanation of order codes for rotary drive with 
bevel gear (RA3UA) 38
2 Design with electric motor drive 39
2.1 Electric motor drive, coaxial (RA1M) 39
2.2 Electric motor drive, with coaxial gear (RA2M) 39
2.3 Electric motor drive, with bevel gear (RA3M) 39
2.4 Explanation of orders codes for electric motor drive, 
coaxial (RA1M) 43
2.5 Explanation of order codes for electric motor drive with 
coaxial gear (RA2M) 44
2.6 Explanation of order codes for electric motor drive with 
bevel gear (RA3M) 45
3 Design with rotary drive, with grease reservoir 46
3.1 Rotary drive, with bevel gear and grease reservoir (RA...3UA) 46
3.2 Explanation of order codes for rotary drive, 
with bevel gear and grease reservoir (RA...3UA) 47
4 Design with electric motor drive, with grease reservoir 48
4.1 Electric motor drive, with coaxial gear and 
grease reservoir (RA...2M) 48
4.2 Electric motor drive, with bevel gear and 
grease reservoir (RA...3M) 48
4.3 Explanation of order codes for electric motor drive, 
with coaxial gear and grease reservoir (RA...2M) 50
4.4 Explanation of order codes for electric motor drive, 
with bevel gear and grease reservoir (RA...3M) 51
5 Fill level control 52
5.1 Fill level control for grease with changeover function K (E) 52
5.2 Fill level switch with NC/NO function for grease (F) 52
6 Tightening torques 52
Supply, returns, storage 53
1 Supply 53
2 Return shipment 53
3 Storage 53
3.1 Corrosion protection 54
3.2 Special storage conditions for motors 54
Assembly 55
1 General information on assembly 55
2 Assembly location 56
2.1 Minimum mounting dimensions 56
3 RA oil and grease lubrication pumps 57
3.1 Rotary drive, coaxial (RA1UA) 57
3.2 Rotary drive, with coaxial gear (RA2UB) 58
3.3 Rotary drive, with bevel gear (RA3UA) 59
3.4 Electric motor drive, coaxial (RA1M) 60
3.5 Electric motor drive, with coaxial gear (RA2M) 61
3.6 Electric motor drive, with bevel gear (RA3M) 62
4 RA grease lubrication pumps with grease reservoir 63
4.1 Rotary drive, with bevel gear and grease reservoir (RA...3UA) 63
4.2 Electric motor drive, with coaxial gear and 
grease reservoir (RA...2M) 64
4.3 Electric motor drive, with bevel gear and 
grease reservoir (RA...3M) 65
5 Assembly of RA multiline pumps 66

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951-180-082-EN 
Version 01
EN Table of contents
5.1 RA rotary drive 66
5.2 RA electric motor drive 67
6 Electrical connection 68
6.1 Establish the motor connection 70
6.2 Establishing equipotential bonding connection 71
7 Electrical connection of fill level controls 72
7.1 Connection for fill level control K (E) 73
7.2 Fill level control F 73
8 Lubrication lines 74
8.1 Lubrication line arrangement 74
8.2 Connection of the lubrication lines 75
First start-up 76
1 Conduct an insulation test 76
2 Venting the RA multiline pump and lubricant lines 77
2.1 Venting an RA grease multiline pump 78
2.2 Venting an RA oil multiline pump 79
3 Adjusting the displacement using displacement chart 
and continuous operating pressure 80
4 Inspections before first start-up 83
5 Inspections during first start-up 83
Operation 84
1 Filling with lubricant (RAxxx3UA; RAxxx2M; RAxxx3M) 84
Cleaning 85
1 Cleaning agents 85
2 Exterior cleaning 86
3 Interior cleaning 86
4 RA multiline pump units with electric motor drive 86
Maintenance 87
1 RA multiline pump units with electric motor drive 87
2 General maintenance instructions 87
3 Electric motor maintenance schedule 90
Malfunctions, causes, and remedies 91
Repairs 92
1 Malfunctions on the fill level control / the fill level switch 92
Shutdown, disposal 93
1 Temporary shutdown 93
2 Permanent shutdown, disassembly 93
3 Disposal 93
Accessories 94
Appendix 95
1 Declaration of Conformity for motor, manufacturer VEM 95
2 Associated supplier documentation 97

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951-180-082-EN

Version 01

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

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951-180-082-EN

Version 01

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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951-180-082-EN

Version 01

EN 1st Safety instructions

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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