Lincoln SKF VarioSuper UFV 20 Series User manual

Assembly Instructions
VarioSuper of the UFV 20-
XXX / UFV 30-XXX series
Minimum quantity lubrication for internal and external lubrication
Created on: 09.05.2022
Document no.: 951-170-244-EN
Version: 01
Read these instructions before
installation or start-up of the
product and keep them readily
available for later consultation!

2
Original EC Declaration of Incorporation in accordance with Directive 2006/42/EC,
Appendix II Part 1 B
The manufacturer hereby declares at its sole responsibility that the partly completed machinery conforms to the essential health and safety requirements
of the Machinery Directive 2006/42/EC, Annex I, marked in the Annex to the EC Declaration of Incorporation as applicable and fulfilled at the time of placing
on the market.
The special technical documents were prepared following Annex VII part B. Upon justifiable request, these special technical documents can be forwarded
electronically to the respective national authorities. The authorized company for the compilation of the technical documentation is the manufacturer.
Designation: VarioSuper
Type / item number: UFV 20-XXX
UFV 30-XXX
Year of manufacture: See type plate
Furthermore, the following directives and standards were applied in the respective applicable areas:
2011/65/EU: RoHS II
2014/30/EU: Electromagnetic Compatibility
EN ISO 12100:2010 EN IEC 61000-6-2:2019 EN IEC 61000-6-3:2007+A1:2011 EN 60947-5-2:2020
EN 609471:2007+A1:2011+A2:2014
The partly completed machinery must not be put into service until it has been established that the machinery into which it is to be incorporated is in
compliance with the provisions of the Machinery Directive 2006/42/EC and all other applicable Directives.
Berlin, 29.01.2016
Jürgen Kreutzkämper
Richard Lindemann
Manager, R&D
Germany
Manager, SE
Berlin
Manufacturer: SKF Lubrication Systems Germany GmbH, Motzener Strasse 35/37, 12277 Berlin, Germany
Original UK Declaration of incorporation according to the Supply of Machinery (Safety) Regulations
2008 No. 1597 Annex II
The manufacturer hereby declares under sole responsibility that the partly completed machinery complies with the essential health and safety
requirements of UK legislation Supply of Machinery (Safety) Regulations 2008 No. 1597 Annex I, marked in the Annex to the EC Declaration of
Incorporation as applicable and fulfilled at the time of placing on the market.
The special technical documents were prepared following Annex VII part B. Upon justifiable request, these special technical documents can be forwarded
electronically to the respective national authorities. The authorized company for the compilation of the technical documentation is SKF (U.K.) Limited,
2 Canada Close, Banbury, Oxfordshire, OX16 2RT, GBR.
Designation: VarioSuper
Type / item number: UFV 20-XXX
UFV 30-XXX
Year of manufacture: See type plate
Furthermore, the following regulations and standards were applied in the respective applicable areas:
Supply of Machinery (Safety) Regulations 2008 No. 1597
•Electromagnetic Compatibility Ordinance 2016 No. 1091
•The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2012 No. 3032
EN ISO 12100:2010 EN IEC 61000-6-2:2019 EN IEC 61000-6-3:2007+A1:2011 EN 60947-5-2:2020
EN 609471:2007+A1:2011+A2:2014
EN IEC 63000:2018
The partly completed machinery must not be put into service until it has been established that the machinery into which it is to be incorporated is in
compliance with the provisions of UK legislation Supply of Machinery (Safety) Regulations 2008 No. 1597 and all other applicable Directives.
Berlin, 29.01.2016
Jürgen Kreutzkämper
Richard Lindemann
Manager, R&D
Germany
Manager, SE
Berlin
Manufacturer: SKF Lubrication Systems Germany GmbH, Motzener Strasse 35/37, 12277 Berlin, Germany

3
Appendix to Declaration of Incorporation in accordance with 2006/42/EC, Annex II, No. 1 B
Description of the essential health and safety requirements according to 2006/42/EC, Annex I, which have been applied and fulfilled:
Table 1
Appendix to Declaration of Incorporation
No.: Essential health and safety requirement Applicable: Fulfilled:
1.1 Principles
1.1.2 Principles of safety integration Yes Yes
1.1.3 Materials and products Yes Not completely
fulfilled 1)
1.1.5 Design of machinery to facilitate its handling Yes Yes
1.1.6 Ergonomics Yes Not completely
fulfilled 2)
1.2 Control systems
1.2.1 Safety and reliability of control systems Yes Yes
1.2.3 Starting Yes Yes
1.2.6 Failure of the power supply Yes Yes
1.3 Protection against mechanical hazards
1.3.1 Risk of loss of stability Yes
Y
es
1.3.2 Risk of break-up during operation Yes Not completely
fulfilled 3)
1.3.4 Risks due to surfaces, edges or angles Yes Yes
1.3.7 Risks related to moving parts Yes Yes
1.3.9 Risks of uncontrolled movements Yes
Y
es
1.5 Risks due to other hazards
1.5.1 Electricity supply Yes Yes
1.5.6 Fire Yes Yes
1.5.8 Noise Yes Yes
1.5.13 Emissions of hazardous materials and substances Yes
Y
es
1.5.15 Risk of slipping, tripping, or falling Yes Yes
1.6 Servicing
1.6.1 Machinery maintenance Yes Yes
1.6.2 Access to operating positions and servicing points Yes Not completely
fulfilled 4)
1.6.4 Operator interventions Yes Yes
1.7 Information
1.7.1 Information and warnings on the machinery Yes Yes
1.7.1.1 Information and information devices Yes Yes
1.7.2 Warning of residual risks Yes
Y
es
1.7.3 Marking of machinery Yes Yes
1.7.4 Operating instructions/assembly instructions Yes Yes
1.7.4.1 General principles for the drafting of operating instructions/assembly instructions Yes Yes
1.7.4.2 Contents of the operating instructions/assembly instructions Yes Yes
1.7.4.3 Sales literature Yes
Y
es
1) The MQL system is designed for operation with non-hazardous lubricants. The owner-operator must check whether the lubricant used
has certain hazardous effects (such as sensitization). The installation of a drip pan could be required.
2) The integrator must ensure that the MQL system is integrated into the system in such a way that it can be filled and operated
ergonomically
3) The operator must protect the system against excessive pressure. For this purpose, the system must be provided with a pressure
limiting valve with suitable opening pressure.
4) The integrator must ensure that the MQL is integrated into the system in such a way that it can be operated without danger

4
Masthead
Manufacturer
SKF Lubrication Systems Germany GmbH
Email: [email protected]
www.skf.com/lubrication
Berlin Plant
Motzener Strasse 35/37
12277 Berlin
Germany
Tel. [phone]
Fax [phone]
Walldorf Plant
Heinrich-Hertz-Strasse 2-8
69190 Walldorf, Germany
Germany
Tel.: [phone]
Fax: [phone]
Authorized local distributors
- Great Britain -
SKF (U.K.) Limited,
2 Canada Close, Banbury, Oxfordshire,
OX16 2RT, GBR.
- North America -
SKF Lubrication Business Unit
Lincoln Industrial
5148 North Hanley Road, St. Louis,
MO. 63134 USA
- South America -
SKF Argentina Pte. Roca 4145,
CP 2001 Rosario, Santa Fe
Warranty
The instructions contain no statements regarding the warranty
or liability for defects. That information can be found in our
General Terms of Payment and Delivery.
Training
We conduct detailed training in order to enable maximum safety
and efficiency. We recommend taking advantage of this training.
For further information, contact your authorized SKF dealer or
the manufacturer.

5
Table of contents
Original EC Declaration of Incorporation in accordance with
Directive 2006/42/EC, Appendix II Part 1 B..................... 2
Original UK Declaration of incorporation according to the Supply
of Machinery (Safety) Regulations 2008 No. 1597 Annex
II .............................................................................................. 2
Masthead.............................................................................................4
Table of contents ...............................................................................5
Safety alerts, visual presentation, and layout................................ 7
1. Safety instructions ........................................................................8
1.1 General safety instructions ....................................................8
1.2 General behaviour when handling the product...................8
1.3 Intended use ............................................................................8
1.4 Persons authorized to use the product................................8
1.5 Foreseeable misuse ................................................................8
1.6 Referenced documents...........................................................9
1.7 Prohibition of certain activities..............................................9
1.8 Painting plastic components and seals ................................9
1.9 Safety markings on the product............................................9
1.10 Note on the type plate..........................................................9
1.11 Notes on CE marking ........................................................ 10
1.12 Note on Low Voltage Directive ........................................ 10
1.13 Note on Pressure Equipment Directive .......................... 10
1.14 Note on UKCA marking ..................................................... 10
1.15 Note on EAC marking........................................................ 10
1.16 Note on China RoHS mark ............................................... 10
1.17 Emergency shutdown........................................................ 10
1.18 Assembly, maintenance, fault, repair.............................. 10
1.19 First start-up, daily start-up ............................................ 10
1.20 Residual risks...................................................................... 11
2. Lubricants.....................................................................................12
2.1 General information............................................................. 12
2.2 Material compatibility .......................................................... 12
2.3 Temperature characteristics............................................... 12
2.4 Ageing of lubricants ............................................................. 12
2.5 Avoidance of malfunctions and hazards ........................... 12
3. Overview, functional description ...............................................13
3.1 Functional description ......................................................... 13
3.1.1 Principle of minimal quantity lubrication (MQL) .. 13
3.1.2 Principle of aerosol action....................................... 13
3.2 Overview................................................................................ 13
3.3 Design.................................................................................... 14
3.3.1 Aerosol generator and aerosol reservoir .............. 14
3.3.2 Main air valve............................................................ 14
3.3.3 Valve cluster.............................................................. 14
3.3.4 Auxiliary air valve ..................................................... 14
3.3.5 Pressure switch ........................................................ 14
3.3.6 Pressure gauge......................................................... 15
3.3.7 Lubricant level gauge and fill level monitoring .... 15
3.3.8 Pressure relief valve and other safety measures 15
3.4 Functional description ......................................................... 15
4. Technical data..............................................................................17
5. Delivery, returns, storage...........................................................20
5.1 Delivery.................................................................................. 20
5.2 Return shipment .................................................................. 20
5.3 Storage .................................................................................. 20
5.4 Storage temperature range................................................ 20
6. Assembly.......................................................................................21
6.1 General .................................................................................. 21
6.2 Setup and attachment......................................................... 21
6.2.1 Minimum mounting dimensions ............................ 21
6.2.2 Attachment of the MQL system.............................. 22
6.2.3 Port dimensions, assembly holes, and minimum
mounting dimensions......................................................... 22
6.3 Connection of aerosol lines................................................. 24
6.4 Initial filling............................................................................ 25
6.5 Depressurize the signal aerosol reservoir ........................ 26
6.6 Compressed air connection ................................................ 27
6.7 Electrical connection ............................................................ 28
6.8 Electrical fill level monitoring with up to four switching
points (optional)........................................................................... 28
7. First start-up................................................................................30
7.1 Operating minimal quantity lubrication (MQL) systems . 30
7.2 Procedure.............................................................................. 30
7.3 Approved lubricants............................................................. 30
8. Operation......................................................................................32
8.1 General .................................................................................. 32
8.2 Effects of primary pressure ................................................ 32
8.3 Using the auxiliary air valve................................................ 32
8.4 Setting parameters.............................................................. 32
8.5 Parameter settings for VarioSuper UFV 20-XXX/UFV 30-
XXX................................................................................................ 33
8.6 Electronic pressure switch .................................................. 33
8.6.1 Overview.................................................................... 33
8.6.2 Output characteristics.............................................. 34
8.6.3 "S.P.1" design ........................................................... 34
8.6.4 Overview of basic settings / default settings ........ 34
8.7 Changing the basic settings ................................................ 36
8.8 Setting switching point S.P.1 and hysteresis ................... 36
8.9 Setting the switching point in "S.P.1" mode..................... 37
8.10 Setting the switching point in "H.Y.S.1" mode............... 38
8.11 Ending the basic setting.................................................... 39
8.12 Enabling or disabling the pressure switch...................... 40
9. Maintenance and repair .............................................................41
9.1 Filling the aerosol reservoir ................................................ 41
9.1.1 Depressurize the signal aerosol reservoir ............ 41
9.1.2 Manual filling of the aerosol reservoir................... 42
9.1.3 Automatic filling of the aerosol reservoir.............. 43
9.2 Draining lubricant................................................................. 43
10. Cleaning......................................................................................44
10.1 Basics................................................................................... 44
10.2 Interior cleaning................................................................. 44
10.3 Exterior cleaning ................................................................ 44
11. Faults, causes, and remedies ..................................................45
12. Repairs........................................................................................48
13. Shutdown, disposal...................................................................48
13.1 Temporary shutdown........................................................ 48
13.2 Permanent shutdown, disassembly ................................ 48
13.3 Disposal............................................................................... 48
14. Spare parts ................................................................................49
15. Accessories.................................................................................50
16. Appendix.....................................................................................52
16.1 China RoHS Table.............................................................. 52

6

7
Safety alerts, visual
presentation, and layout
While reading these instructions, you will encounter various
symbols, illustrations, and text layouts intended to help you
navigate and understand the instructions. Their meaning is
explained below.
Safety alerts:
Activities that present specific hazards (to life and limb or
possible damage to property) are indicated by safety alerts.
Always be sure to follow the instructions given in the safety
alerts.
<
DANGER
These safety alerts indicate an imminent danger.
Ignoring them will result in death or serious injury
<
WARNING
These safety alerts indicate potentially imminent
danger. Ignoring them could result in death or
serious injury
<
CAUTION
These safety alerts indicate potentially imminent
danger. Ignoring them could result in minor injury
<
NOTICE
These safety alerts indicate a potentially harmful
situation. Ignoring them could result in damage to
property or malfunctions
Illustrations:
The illustrations used depict a specific product. For other
products, they may have the function of a diagram only. This
does not alter the basic workings and operation of the product.
Text layout:
•First-order bulleted lists: Items on a bulleted list start with
a solid black dot and an indent.
–Second-order bulleted lists: If there is a further listing of
subitems, the second-order bulleted list is used.
1 Legend: A legend explains the numbered contents of an
illustration, presented as a numbered list. Items in a legend
start with a number (with no dot) and an indent.
–Second-order legend: In some cases, the numbered
contents of an image represent more than just one object.
A second-order legend is then used.
1.Instruction steps: These indicate a chronological sequence
of instruction steps. The numbers of the steps are in bold and
are followed by a period. If a new activity follows, the
numbering starts again at “1.”
–Second-order instruction steps: In some cases, it is
necessary to divide up a step into a few substeps. A
sequence of second-order instruction steps is then used.

8
1. Safety instructions
1.1 General safety instructions
•Putting the products into operation or operating them without
having read the instructions is prohibited. The operator must
ensure that the instructions are read and understood by all
persons tasked with working on the product or who supervise
or instruct such persons. Retain the instructions for further
use.
•The product may only be used in awareness of the potential
dangers, in proper technical condition, and according to the
information in this manual.
•Any faults that could affect safety must be remedied
according to responsibility. The supervisor must be notified
immediately in case of malfunctions outside one's individual
scope of responsibility.
•Unauthorized modifications and changes can have an
unpredictable effect on safety and operation. Unauthorized
modifications and changes are therefore prohibited. Only
original SKF spare parts and SKF accessories may be used.
•Any unclear points regarding proper condition or correct
assembly/operation must be clarified. Operation is prohibited
until issues have been clarified.
•The components used must be suitable for the intended use
and the applicable operating conditions, e.g. max. operating
pressure and ambient temperature range, and must not be
subjected to torsion, shear, or bending.
1.2 General behaviour when handling the
product
•Familiarize yourself with the functions and operation of the
product. The specified assembly and operating steps and their
sequences must be observed.
•Keep unauthorized persons away.
•Wear personal protective equipment always.
•Precautionary operational measures and instructions for the
respective work must be observed.
•In addition to these Instructions, general statutory regulations
for accident prevention and environmental protection must be
observed.
•Precautionary operational measures and instructions for the
respective work must be observed. Uncertainty seriously
endangers safety.
•Safety-related protective and safety equipment must not be
removed, modified or affected otherwise in its function and is
to be checked at regular intervals for completeness and
function.
•If protective and safety equipment has to be dismantled, it
must be reassembled immediately after finishing the work,
and then checked for correct function.
•Remedy occurring faults in the frame of responsibilities.
Immediately inform your superior in the case of faults beyond
your competence.
•Never use parts of the centralized lubrication system or of the
machine as standing or climbing aids.
1.3 Intended use
Supply of lubricants.
Spare parts should only be used to replace faulty components of
identical construction.
Use is only permitted within the scope of commercial or
economic activity by professional users, in compliance with the
specifications, technical data, and limits specified in this manual.
1.4 Persons authorized to use the
product
Operator
A person who is qualified by training, knowledge and experience
to carry out the functions and activities related to normal
operation. This includes avoiding possible hazards that may
arise during operation.
Specialist in electrics
Person with appropriate professional education, knowledge and
experience to detect and avoid the hazards that may arise from
electricity.
Specialist in mechanics
Person with appropriate professional education, knowledge and
experience to detect and avoid the hazards that may arise
during transport, installation, start-up, operation, maintenance,
repair and disassembly.
1.5 Foreseeable misuse
Any usage of the product other than as specified in this manual
is strictly prohibited. Particularly prohibited are:
•Use of non-specified consumables, contaminated lubricants,
or lubricants with air inclusions.
•Use of C3 versions in areas with aggressive, corrosive
substances (e.g., high salt load).
•Use of plastic parts in areas with high exposure to ozone, UV
light, or ionizing radiation.
•Use to supply, convey, or store hazardous substances and
mixtures as defined in the CLP Regulation (EC 1272/2008) or
GHS with acute oral, dermal, or inhalation toxicity or
substances and mixtures that are marked with hazard
pictograms GHS01-GHS06 and GHS08.
•Use to supply, convey, or store Group 1 fluids classified as
hazards as defined in the Pressure Equipment Directive
(2014/68/EU) Article 13 (1) a).
•Use to supply, convey, or store gases, liquefied gases,
dissolved gases, vapors, or fluids whose vapor pressure
exceeds normal atmospheric pressure (1013 mbar) by more
than 0.5 bar at their maximum permissible operating
temperature.
•Use in an explosion protection zone.
•Use without proper securing against excessively high
pressures, in the case of pressurized products.
•Use outside of the technical data and limits specified in this
manual.

9
1.6 Referenced documents
In addition to this manual, the following documents must be
observed by the respective target group:
•Company instructions and approval rules
If applicable:
•Safety data sheet of the lubricant used
•Project planning documents
•Supplementary information regarding special designs of the
pump. This you will find in the special system documentation.
•Instructions for other components for setting up the
centralized lubrication system.
1.7 Prohibition of certain activities
•Repairs or modifications to the drive
•Alterations to the control circuit board beyond adjustment of
lubrication times and interval times or replacement in case of
defect
•Alterations to the power supply board beyond replacement in
case of defect
1.8 Painting plastic components and
seals
The painting of any plastic components and seals of the
products described is prohibited. Completely mask or remove
plastic components before painting the main machine.
1.9 Safety markings on the product
A warning label is affixed to the product (Fig. 1). Before startup,
check that the warning label is present and intact. Immediately
replace the label if it is damaged or missing. The product must
not be operated until then.
Fig. 1
Positioning of warning label
Legend to Figure 1:
1 Warning label
Table 2
Order number
Designation Order No.
<Content>
R=
Warning label 951-111-173
1.10 Note on the type plate
The type plate provides important data such as the type
designation, order number, barcode, and serial number. To
avoid loss of this data in case a type plate becomes illegible,
these characteristics , should be entered in the figure below.
•Enter the characteristics from the type plate (Fig. 2):

10
Fig. 2
Type plate (example)
1.11 Notes on CE marking
•2006/42/EG Machinery Directive
•2014/30/EC Electromagnetic Compatibility
•2011/65/EU Directive on the restriction of the use of certain
hazardous substances in electrical and electronic equipment
(RoHS II)
1.12 Note on Low Voltage Directive
The protection objectives of the Low Voltage Directive
2014/35/EU are met in accordance with Annex I, No. 1.5.1 of
the Machinery Directive 2006/42/EC.
1.13 Note on Pressure Equipment
Directive
Due to its performance characteristics, the product does not
reach the limit values defined in Article 4, Paragraph 1,
Subparagraph (a) (ii) and is excluded from the scope of Pressure
Equipment Directive 2014/68/EU in accordance with Article 1,
Paragraph 2 Subparagraph (f).
1.14 Note on UKCA marking
The UKCA conformity marking confirms the
product’s conformity with the applicable legal
provisions of Great Britain.
1.15 Note on EAC marking
The EAC conformity marking confirms the
product’s conformity with the applicable legal
provisions of the Eurasian customs union.
1.16 Note on China RoHS mark
The China RoHS mark confirms that there is no
danger to persons or the environment from the
regulated substances contained within for the
intended period of use (year number shown in the
circle).
1.17 Emergency shutdown
This is done by a course of action to be defined by the operator.
1.18 Assembly, maintenance, fault,
repair
Prior to the start of this work, all relevant persons must be
notified of it. At a minimum, the following safety measures must
be taken before any work is done:
•Unauthorized persons must be kept away
•Mark and secure the work area
•Cover adjacent live parts
•Dry any wet, slippery surfaces or cover them appropriately
•Cover hot or cold surfaces appropriately
Where applicable:
•Depressurize
•Isolate, lock and tag out
•Check to ensure live voltage is no longer present
•Ground and short-circuit
The product should be protected as much as possible from
humidity, dust, and vibration, and should be installed so that it is
easily accessible. Ensure an adequate distance from sources of
heat or cold. Any visual monitoring devices present, such as
pressure gauges, min./max. markings, or oil level gauges must
be clearly visible. Observe the mounting position requirements.
Drill required holes only on non-critical, non-load-bearing
parts of the operator's infrastructure. Use existing holes where
possible. Avoid chafe points. Immobilize any moving or detached
parts during the work. Adhere to the specified torques.
If guards or safety devices need to be removed, they must be
reinstalled immediately following conclusion of work and then
checked for proper function.
Check new parts for compliance with the intended use before
using them.
Avoid mixing up or incorrectly assembling disassembled parts.
Label parts. Clean any dirty parts.
1.19 First start-up, daily start-up
Ensure that:
•All safety devices 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 immediately replaced

11
1.20 Residual risks
Table 3
Residual risks
Residual risk Possible in lifecycle Avoidance / Remedy
Dropping of the MQL system during the
installation procedure
B •Install the MQL system using load lifters (e.g., a crane).
Ensure adequate fastening/securing of the unit (loading
capacity).
People slipping due to floor
contamination with spilled lubricant
C D •Exercise caution when filling and when closing the fill
connection cap
•Promptly apply suitable binding agents and remove the
spilled lubricant
•Follow operational instructions for handling oils and
contaminated parts
Tearing/damage to lines when installed
on moving machine components
C D •If possible, do not install on moving parts; if this cannot
be avoided, use flexible hose lines.
Lubricating oil spraying out due to faulty
component fitting / faulty line connection
C D •Tighten all components with the appropriate tightening
torques. Use hydraulic screw unions and lines suitable
for the indicated pressures. These must be checked for
proper connection and for damage prior to
commissioning.
Lubricant blockage on tool G Clean lubricant bores on the tool
Overpressure on reservoir, filter, screw
unions, and lines
F The VarioSuper must be depressurized before
maintenance work is performed
Environmental contamination by
lubricants and wetted parts
K Dispose of contaminated parts according to the applicable
legal/company rules
Lifecycle phases: A = Transport, B = Assembly, C = First start-up, D = Operation, E = Cleaning, F = Maintenance, G = Malfunction, repair, H
= Shutdown, K = Disposal

12
2. Lubricants
2.1 General information
Lubricants are selected specifically for the respective application.
The selection is made by the manufacturer or operator of the
machine, preferably together with the lubricant supplier. Should
you have little or no experience with the selection of lubricants
for lubrication systems, please contact us. We will be pleased to
support you in the selection of suitable lubricants and
components for the construction of a lubrication system
optimized for the respective application. Please observe the
following points when selecting/using lubricants. You will avoid
possible downtimes and damages to your machine or the
lubrication system.
2.2 Material compatibility
Lubricants must generally be compatible with the following
materials:
•Plastics: ABS, CR, FPM, NBR, NR, PA, PET, PMMA, POM, PP,
PS, PTFE, PU, PUR
Metal steel, grey iron, brass, copper, aluminium
2.3 Temperature characteristics
The lubricant used must be suitable for the specific ambient
temperature of the product. The viscosity required for proper
operation of the product must not be exceeded in case of low
temperatures nor fall below specification in case of high
temperatures. Specified viscosity, see chapter Technical data.
2.4 Ageing of lubricants
Depending on the experience with the lubricant used, it should
be checked at regular intervals to be determined by the
operator whether the lubricant needs to be replaced due to
ageing processes (bleeding). If there is any doubt as to the
further suitability of the lubricant, it must be replaced before
recommissioning. If you have no experience with the lubricant
used, we recommend testing after only one week.
2.5 Avoidance of malfunctions and
hazards
To avoid malfunctions or hazards, please observe the following:
•When handling lubricants, observe the relevant safety data
sheets (SDS) and hazard designations on the packaging, if
any.
•Due to the large number of additives, individual lubricants
which meet the requirements for pumpability specified in the
instructions may not be suitable for use in centralized
lubrication systems.
•Always use SKF lubrication greases, if possible. These are
optimally suited for use in lubrication systems.
•Do not mix lubricants. This may have unforeseeable effects on
the characteristics and on the usability of the lubricant.
•The ignition temperature of the lubricant must lie at least
50 K over the maximum surface temperature of the
components.

13
3. Overview, functional
description
3.1 Functional description
3.1.1 Principle of minimal quantity
lubrication (MQL)
Minimal quantity lubrication (MQL) involves total-loss
lubrication, i.e., the lubricant is almost completely consumed
during machining so treatment of the lubricant is not required.
The actual lubrication is performed at the friction point between
the tool and the chips running off in the chip groove. The
lubricating effect is achieved by an aerosol, i.e., droplets of
lubricant finely dispersed in an air flow. Minimal quantity
lubrication provides for effective lubrication of cutting processes
using very small amounts of lubricant. The arduous task of
cleaning and disposing of large amounts of lubricant and cooling
lubricant is greatly simplified or eliminated.
3.1.2 Principle of aerosol action
Aerosol is a mixture of air and lubricant in which air assumes
the transport properties for the lubricant. In terms of the size
and distribution of lubricant droplets created, the SKF MQL
system described here generates a very homogeneous aerosol
with a droplet size of approx. 0.5 m.
The lubricant droplets are very light due to their small size,
which in turn results in a very low moment of inertia. These
small droplets of lubricant can be transported over long
stretches through lines and deflections without being deposited
due to their moment of inertia.
Additionally, the transport of the aerosol through rotating
spindles and tools is unproblematic for the MQL systems even
at very high rotational speeds, since the effect of centrifugal
force on the oil droplets is very low.
3.2 Overview
Fig. 3
Overview

14
Table 4
Legend to Figure 4:
No. Index* Description
1
V
06 Lubricant filling port with check valve
2 Q01 Pressure gauge for primary air pressure
3
V
05 Main air valve with P01 compressed air connection port (nom. size 8)
4 Q02 Pressure gauge for internal reservoir pressure
5
V
07 Overflow valve (12 bar)
6
Z
01 - Z03
A
erosol outlets (3x), quick coupling for pipe diameter 12 mm
7
V
01 – V04
V
alve cluster
8
Z
04 Oil drain plug
9 N1 Lubricating oil fill level indicator
10 B01
A
erosol reservoir
11
S
01 Electronic pressure switch
12 Electrical connector plugs
13
S
02
–
S05 Electrical connections for fill level monitoring
*See functional diagram; Chapter 3.4 "Functional description"
3.3 Design
NOTE
The figure in Chapter 3.4 "Functional description" shows the
basic structure of the VarioSuper minimal quantity
lubrication system. The key components are described in
more detail in the following sections.
3.3.1 Aerosol generator and aerosol
reservoir
The heart of the SKF MQL system VarioSuper is the compressed
air aerosol generator integrated into the aerosol reservoir (item
10). The reservoir at the same time serves for storage and as a
pressure accumulator during operation.
The aerosol generator unit is comprised of several differently
designed aerosol generators that can be combined. These
generators and a valve system controlling the quantity of air
required to generate the aerosol (see following section) enable
the generation of aerosols with very different lubricant content.
Thus, for different tools, the required delivery rate can be
ensured to accommodate the cross-sectional and geometrical
properties of the tool.
3.3.2 Main air valve
The main air valve (item 3) separates all downstream units of
the MQL system from the compressed air supply. No aerosol is
produced when the main air valve is closed. When the valve is
closed, the lubricant reservoir is vented if the aerosol can flow
out unimpeded through the aerosol lines.
The main air valve is controlled by the machine control unit
via a multi-pole control line.
3.3.3 Valve cluster
The quantity of air required to generate aerosol is controlled by
means of four valves which are integrated in a valve cluster
(item 7).
Three of these valves control the composition of the aerosol,
while the fourth valve can be used to supply additional air to
increase the transport speed for of the aerosol (auxiliary air
valve - see following section).
The valves are directly controlled by the machine control unit
via a multi-pole control line. By combining the operation of the
different valves, the lubricant concentration of the aerosol can
be adapted to the processing task at hand.
The respective switching conditions of the valves are indicated
by LEDs on the valve cluster. When an LED is on, the valve is
being energized, i.e., it is open.
3.3.4 Auxiliary air valve
Using the auxiliary air valve, air may be added to the aerosol,
ensuring sufficient flow velocity of the aerosol even if very little
lubricant is required (e.g., for tools with very small cooling duct
diameter). The air added by this valve does not flow through the
aerosol generator. See also Chapter 8.3 "Using the auxiliary air
valve".
3.3.5 Pressure switch
This pressure switch (item 11) is used to monitor the pressure
difference between the reservoir´s interior and the primary
pressure. The pressure switch interrupts the compressed air
supply and no more aerosol is produced if the pressure
difference drops below a certain factory-set value due, e.g., to

15
the use of a tool with a very small cooling duct cross-section.
Aerosol which has already been produced drains off. Aerosol
generation continues when the differential pressure rises again.
This process is referred to as pressure differential control.
Pressure differential control is active when voltage is applied
to the pressure switch. If the pressure switch remains
voltageless, pressure differential control is shut off. More
information concerning the pressure switch can be found in the
respective operating manual.
3.3.6 Pressure gauge
The system features two pressure gauges. The pressure gauge,
Q01 (item 2), indicates the current primary pressure applied to
the MQL system by the compressed air supply system; the
pressure gauge, Q02 (item 4), indicates the internal reservoir
pressure.
If the MQL system operates intermittently, the pointer of the
pressure gauge (item 4) alternates between two values. This
type of indication is system-inherent and does not indicate an
error condition.
3.3.7 Lubricant level gauge and fill level
monitoring
The lubricant level in the reservoir is continuously indicated by a
spy glass (item 9) with scale. Depending on the version, the
filling level may be monitored by means of sensors, while critical
lubricant supply levels may be reported to the machine control
unit. When the reservoir is overfilled (fill level higher than
“Maximum”), the excessive lubricant must be drained (see
Chapter 9.2 "Draining lubricant"), since aerosol can otherwise
not be generated.
3.3.8 Pressure relief valve and other safety
measures
As a safety device, a pressure relief valve is installed in the cover
flange of the reservoir (item 5); it limits the interior reservoir
pressure if the pressure to max. 12 bar. Manual operation of
the pressure relief valve depressurizes the aerosol generator.
As a further safety measure, the thread of the filling port is
provided with a groove. This ensures that the pressure can
escape if the cover is accidentally removed from the pressurized
reservoir. The same applies to the plug screws for the
alternative outputs. However, these screws have bores that
ensure the pressure will escape from the reservoir as soon as
the screw is loosened somewhat.
3.4 Functional description
Fig. 4
Functional diagram of the MQL system VarioSuper
Table 5
Legend to Figure 1:
Index Explanations
<Content>
B01 Aerosol reservoir
N01 Fill level indicator
P01 Compressed air connection
Q01 Pressure gauge for primary pressure,
display in bar
Q02 Pressure gauge for internal reservoir
pressure, display in bar
S01 Electronic pressure switch
S02/03/04/05 Capacitive fill level monitoring
V01
–
V03 Valves to control aerosol composition
V04 Auxiliary air valve
V05 Main air valve
V06 Filler coupling
V07 Pressure relief valve (pressure
regulating valve)
Z01 – Z02 Aerosol outlets
Z04 Oil drain plug
The MQL system VarioSuper is operated with compressed air.
The compressed air passes the main air valve (V05) and
reaches the valve cluster (V01-V04), where the quantity of air
required for the respective lubricant quantity is set. Next the air
flows into the aerosol reservoir (B01), in which the operating
pressure, also referred to as interior reservoir pressure, builds
up. Subjected to this pressure, lubricant flows from the
reservoir through the lubricant supply line to the aerosol
generator unit, where the aerosol is generated with the aid of
the incoming air. The aerosol is then transported by the air

16
through one or several aerosol lines (Z01-Z03) to the tool or
lubrication point connected.
The MQL system VarioSuper is controlled by the machine
tool, which, upon specification of the customized tool-specific M
commands, outputs the required control signals to the MQL
system.
The valves of the valve cluster are operated on the basis of
these signals, thus achieving the required aerosol composition.
Additionally, the main air valve and the auxiliary air valve are
controlled by the machine control unit. Also, the differential
pressure control (S01) of the MQL system may be activated or
deactivated as needed.
Differential pressure control is an operating mode of the MQL
system, in which the pressure difference between the primary
air pressure and the interior reservoir pressure is monitored. If
the differential pressure drops below a certain factory-set value,
e.g., because a tool with a very small cooling duct cross section
is used, the compressed air supply is shut-off and no further
aerosol produced. Aerosol which has already been produced
drains off. Aerosol generation continues when the differential
pressure rises again. This procedure is known as “cycling” and is
audible during operation.

17
4. Technical data
Table 6
UFV 20-XXX / UFV 30-XXX
Designation Unit
V
alues
Housing
A
L
A
mbient temperature
°
C
+
10 to + 40
Mounting position
V
ertical, connections upward
External dimensions (L x W x H)
m
m
4
26 x 270 x 200
W
eight empty kg 9.5
Operating pressure of compressed air
•Primary pressure, max.
•Primary pressure, min.
b
ar
•10
•4 (dependent on the diameter of the tool’s cooling ducts, i.e.,
on the back pressure)
A
erosol reservoir capacity l
1
.8
Lubricant output 1)
m
l/h
1
-200
A
ir consumption 1) Nl/min
1
-300
A
ir flow rate Nl/min
1
0-500 (dependent on primary air pressure and diameter of
c
ooling ducts)
Purity of permissible compressed air
A
t least quality class 5 per DIN ISO 8573-1: max. particle
size/density 40 m/10 mg/m³; pressure dew point 7°C; water
content max. 7800 mg/m³; residual oil content max. 25 mg/m³.
A
erosol outlets
3
(optional)
Specification for aerosol hoses Ø mm
1
2 (Material: polyamide)
Compressed air connection of aerosol
outlets
Coupling socket nom. size 8 for hose (internal) Ø 7-8 mm
Harting plug connector HAN
1
0A
Fill level control (2 x capacitive
switches), switching voltage
V
DC 24
Switched current, max.
A
0
.2
Enclosure rating acc. to DIN EN 40050 IP 64
1) Depends on the diameter of the tool’s cooling ducts (back pressure) and the lubricant
Table 7
Electrical
Designation Unit
V
alues
Harting plug connector HAN
1
0A
Fill level control (2 x capacitive
switches), switching voltage
V
DC 24
Switched current, max.
A
0
.2
Enclosure rating acc. to DIN EN 40050 IP 64
Main air valve
Operating voltage
V
DC 24
Power consumption
A
2
Enclosure rating acc. to DIN EN 40050 IP 65
Pressure switch
Pressure switch
Enclosure rating acc. to DIN EN 40050 IP 67

18
Table 8
Requirements for compressed air
Designation Unit
V
alues
Maximum primary pressure
b
ar
1
0
Minimum primary pressure 1)
b
ar
4
Supply pressure when discharging 300
normal liters/min
bar gauge Max. 6
Compressed air quality class acc. to ISO
8573-1
5
Maximum particle size m
4
0
Maximum particle density
m
g/m³
1
0
Maximum pressure dew point
°
C
+
7
Maximum third-party lubricant
concentration
m
g/m³25
1) Depends on the diameter of the tool’s cooling duct (back pressure)
Table 9
Electronic pressure switch
Designation Characteristics
Input variables
Measuring ranges
1
0 bar
Overload ranges
3
0 bar
Burst pressure > 50 bar
Output variables
A
ccuracy (display) ≤± 0.5 % FS typ. 1)
≤± 1 % FS max. 1)
Reproducibility ≤± 0.25 % FS max.
T
emperature drift ≤± 0.25 % / 10 K zero point max.
≤± 0.25 % / 10 K range max.
Switching outputs
Design PNP transistor output
Switched current Max. 1.2 A
Switching cycles
>
100 million
Response time < 10 ms
DESINA diagnostic signal (pin 2)
Function OK:
Level
HIGH level; not OK: LOW level
HIGH: = +Ub ; LOW: < + 0.3 V

19
Table 9
Electronic pressure switch
Designation Characteristics
Ambient conditions
CE mark EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4
V
ibration resistance Approx. 10 g / 0 to 500 Hz (IEC 60068-2-6)
Impact resistance Approx. 50 g / 11ms (IEC 60068-2-29)
Other data
Supply voltage 9 to 35 VDC
Power consumption Max. 35 mA (inactive switching output)
Current-carrying capacity of signal
outputs
1.2 A
Number of signal outputs 2
T
ype of signal outputs PNP transistor stages
Electrical connection M12x1 connector, 4-pin
Enclosure rating IP 67
T
wistability
•Longitudinal axis
•Display
•340°
•270°
W
etted parts, thin film strain gauge Stainless steel, FKM seal
Display 4-digit, LED, 7-segment, red
A
djustable display bar, psi, MPa
W
eight Approx. 120 g
1) FS (Full Scale) = relative to the full measuring range

20
5. Delivery, returns, storage
5.1 Delivery
After receipt of the shipment, it must be inspected for any
shipping damage and for completeness according to the
shipping documents. Immediately inform the transport carrier
of any shipping damage. The packaging material must be
preserved until any discrepancies are resolved.
5.2 Return shipment
Before return shipment, all contaminated parts must be
cleaned. If this is not possible or practical, e.g. if it would impede
fault detection in the case of complaints, the medium used must
always be specified. In the case of products contaminated with
hazardous substances as defined by GHS or CLP regulations,
the safety data sheet (SDS) must be sent with the product and
the packaging must be labelled in accordance with GHS/CLP.
There are no restrictions for land, air, or sea transport. The
choice of packaging should be based on the specific product and
the stresses to be expected during transport (e.g., necessary
anti-corrosion measures in the case of shipment by sea). In the
case of wooden packaging, the applicable import regulations
and the IPPC standards must be observed. Required certificates
must be included in the shipping documents. The following
information, as a minimum, must be marked on the packaging
of return shipments.
Fig. 5
Marking of return shipments
5.3 Storage
The following conditions apply to storage:
•Dry, low-dust, vibration-free, in closed rooms
•No corrosive, aggressive substances at the storage location
(e.g., UV rays, ozone)
•Protected against animals (insects, rodents)
•If possible, keep in the original product packaging
•Protected from nearby sources of heat or cold
•In the case of large temperature fluctuations or high humidity,
take appropriate measures (e.g., heating) to prevent the
condensation of water
•Before usage, check products for damage that may have
occurred during storage. This applies in particular to parts
made of plastic (due to embrittlement).
5.4 Storage temperature range
For parts not filled with lubricant, the permitted storage
temperature is the same as the permitted ambient temperature
range (see “Technical data”).