KRAL OME Series User manual
www.kral.at
Operating Instructions
KRAL Flowmeter.
OME Series.
OIO 20en
Edition 2020-05
Original instructions
2 OIO 20en Edition 2020-05 Operating Instructions
Table of contents
KRAL Flowmeter – OME Series
About this document
□Target groups 3
□Symbols 3
▪Danger levels 3
▪Danger signs 3
▪Symbols in action-specific sections 4
□Further associated documents 4
Safety
□Proper use 5
□Safety instructions 5
Labeling
□Type code 6
□Rating plate 7
Technical data
□Operating limits 8
▪Load due to pressure pulsation 8
▪Maximum values 8
▪Substitute operating data 9
□Noise levels 9
□Heating system 9
▪Trace heating system 9
□Dimensions and weights 10
▪OME with connection box and
BSPP thread connection 10
▪OME with Smart Solution electronic unit
and BSPP thread connection 11
▪OME with connection box and
DIN flange connection 12
▪OME with Smart Solution electronic unit
and DIN flange connection 13
□Specification of connection box 14
□Specification of Smart Solution
electronic unit 14
Function description
□Description 15
□Rolling bearings 15
□Signal generation 15
□Linearization 16
□Connection box 16
□Smart Solution electronic unit 16
Transportation, storage and disposal
□Unpacking and checking the state of
delivery 17
□Lifting the flowmeter 17
□Storage 17
□Preservation 17
▪Preserving the flowmeter 17
▪Removing the preservation 18
□Disposal 18
Installation, removal and connection
□Safety instructions for installation and
removal 19
□Installing the flowmeter 19
▪Installation types 19
▪Preferred installation variant 20
▪Recommendations for alternative
installation variants 20
▪Protect the flowmeter against
contamination 21
▪Connecting the flowmeter to the
pipe system 21
□Electrical connection 22
▪Safety instructions for electrical
installation 22
□Removing the flowmeter 23
Operation
□Commissioning 24
▪Cleaning the pipe system 24
▪Checking the function 24
□First commissioning 24
□During operation 25
□Switching off the flowmeter 25
▪Safety instruction for switching off the
flowmeter 25
▪Switching off the flowmeter 25
□Recommissioning the flowmeter 25
Maintenance
□Safety instructions for maintenance 26
□Required maintenance 26
□Recalibration of the flowmeters 26
□Mounting instructions OME 27
▪Removing seals and bearings 27
▪Installing seals and bearings 28
□Mounting instructions connection box 29
▪Removing the sensor insert 29
▪Installing the sensor insert 29
▪Checking the function of the
connection box 30
□Mounting instructions Smart Solution
electronic unit 31
▪Removing Smart Solution electronic unit 31
▪Installing the Smart Solution
electronic unit 32
▪Checking the function of the
Smart Solution electronic unit 32
Troubleshooting
□Possible faults 33
□Troubleshooting 33
Appendix
□Spare parts 35
▪Maintenance kit OME 13 – 52 35
▪Sensor insert for connection box 36
▪Smart Solution electronic unit 36
□Tightening torques 37
□Contents of the EC Declaration of
Conformity 37
□Notes 38
Operating Instructions OIO 20en Edition 2020-05 3
Target groups
About this document
About this doc ument The operating instructions form part of the product. The operating instructions must be kept for future
reference. Furthermore please observe the associated documents.
Target groups
Symbols
Danger levels
Danger signs
Target group Tasks
Operator-owner □Keep these instructions available at the installation site for future
reference.
□Ensure that employees read and observe these instructions and
the associated documents, in particular the safety instructions
and warnings.
□Observe additional system-specific directives and regulations.
Specialist personnel, fitters □Read, observe and follow these instructions and the associated
documents, in particular the safety instructions and warnings.
Warning Danger level Consequences of non-observances
Danger Immediate threat of danger Serious personal injury, death
Warning Possible threat of danger Serious personal injury, invalidity
Caution Potentially dangerous situation Slight personal injury
Caution Potentially dangerous situation Material damage
Meaning Source and possible consequences of non-observance
Personal injury Physical injury, death
Electrical voltage Electrical voltage causes serious physical injury or
death
Hot surface Hot surface can cause physical injury
4 OIO 20en Edition 2020-05 Operating Instructions
Further associated documents
About this document
Symbols in action-specific sections
Further associated documents
Symbol Meaning
Warning personal injury
Notice
Procedures mechanical installation
Procedures electrical installation
Check or fault table
Request for action
Calibration certificate
Declaration of conformity as per EU Directive 2006/42/EC
Manufacturer's declaration as per EU Directive 2014/68/EU
Corresponding operating instructions for electronic equipment
Operating Instructions OIO 20en Edition 2020-05 5
Proper use
Safety
Safety Proper use
□Use flowmeters of the OME series solely for flow measurement of lubricating liquids that are chemi-
cally neutral and do not contain any gas or solids content.
□Flowmeters require the operation with clean liquids. If coarse contamination, solid particles in the
liquid or abrasive fine particles occur during operation, the flowmeter has to be protected additionally
by a correspondingly dimensioned operating filter in the pipe system, see "Protect the flowmeter
against contamination", page 21.
□Do not use flowmeters outside the operating limits specified on the rating plate and in the chapter
"Technical data". Deviating operating data can result in damage to the flowmeter. In the case of ope-
rating data that does not agree with the specification on the rating plate, please contact the manufac-
turer.
□Strong changes to the flow rate (e.g. rapid shutdown, pulsations ...) cause marked pressure differen-
ces on the flowmeter and can damage the measuring unit. The pressure loss of the flowmeter must
not exceed the values given in the chapter "Technical data".
Safety instructions
The following safety instructions must be observed:
□No liability is accepted for damage arising through non-observance of the operating instruc-
tions.
▪Read the operating instructions carefully and observe them.
▪The operator-owner is responsible for the observance of the operating instructions.
▪Installation, removal and installation work may only be carried out by specialist personnel.
□Flowmeters wear to different degrees depending on the respective operating conditions (pul-
sations, temperature …).
▪Do not continue to use flowmeters that are operated contrary to specification or after damage.
▪Check the flowmeters regularly.
▪Shut down damaged flowmeters and replace worn flowmeters immediately.
□In order for the warranty to remain valid, corrective maintenance carried out during the war-
ranty period requires the express permission of the manufacturer.
□Observe the general regulations for the prevention of accidents as well as the local safety
and operating instructions.
□Observe the valid national and international standards and specification of the installation
location.
□In case of systems with an increased potential of danger to humans and/or machines the fai-
lure of a flowmeter may not lead to injuries or damage to property.
▪Always equip systems with an increased potential of danger with alarm equipment and/or
bypass.
▪Maintain and check the protective/alarm equipment regularly.
□The pumped liquids can be dangerous (e.g. hot, dangerous to health, poisonous, combus-
tible). Observe the safety conditions for handling dangerous materials.
□Pumped liquids can be subject to pressure and can cause damage and/or personal injury
should leaks occur.
6 OIO 20en Edition 2020-05 Operating Instructions
Type code
Labeling
Labeling Type code
1Series
2Size
3Sensor technology
4Function of sensor technology
5Material of bearing
6Material of seal
7Mechanical connection
8Electrical connection
9Version index
Fig. 1 Type code
Item Designation Description
1Series OME: Economy
2Size Corresponds to the diameter of the measuring screw large in [mm]
3Sensor technology J: BEG 60-62
X: Special design
4Function of sensor
technology
D: With flow direction detection, with temperature compensation
X: Special design
5Material of bearing A: Steel
X: Special design
6Material of seal A: FPM (FKM)
B: FFPM
C: Low temperature FPM
D: EPDM
X: Special design
7Mechanical connection A: Pipe thread connection BSPP
B: Flange connection DIN
C: Pipe thread connection NPT
D: Flange connection ANSI
X: Special design
8Electrical connection C: Cable gland connection box
D: Mounting kit for electronic unit
E: Smart Solution design
X: Special design
9Version index For internal administration
OME-020.JDAAFD.0001
3
4
5
2
7
68
9
1
Operating Instructions OIO 20en Edition 2020-05 7
Rating plate
Labeling
Rating plate
1Serial number
2Year of construction
3K-factor
4Preferred flow direction
5Maximum temperature
6Type
7Maximum pressure
Fig. 2 Rating plate
123
4
5
6
7
8 OIO 20en Edition 2020-05 Operating Instructions
Operating limits
Technical data
Technic al data Operating limits
The values specified on the rating plate and the calibration certificate apply. The permissible operating
limits of individual values influence each other so that every application is checked individually by the
manufacturer when selecting the flowmeter.
If no operating data are provided by the orderer, standardized substitute operating data are used.
Load due to pressure pulsation
Maximum values
The following table shows the respective maximum values that, however, may not occur simultaneously.
In addition, the operating limits of the corresponding end connection, of the sealing material and of the
connection box or Smart Solution electronic unit are to be observed.
Tab. 1 Maximum values
Strong pressure pulses in the system can reduce the lifetime of
the flowmeter.
Fig. 1 Pressure pulses
OME 13 OME 20 OME 32 OME 52
Flow rate
Qmax [l/min] 15 45 150 525
Qnenn 10 30 100 350
Qmin 0.1 0.3 1.0 3.5
Pressure max. [bar] 40 40 40 40
Temperature
min. – max. [°C] -20...+125
Viskosität
min. – max. [mm2/s] 1 – 1000000
Measuring chamber volume [ml/U] 1.65 6.24 25.6 112.8
Rotation speed
n (Qmax)[min-1]9120 7260 5850 4658
n (Qnenn)6060 4830 3900 3105
n (Qmin)61 48 39 31
Number of poles K1 2 2 2 2
K-factor K1 [P/l] 1214 321 78 17.73
Milliliters per pulse K1 [ml/P] 0.824 3.12 12.8 56.4
Pulse frequency
f1 (Qmax) [Hz] 304 242 195 155
f1 (Qnenn)202 161 130 104
f1 (Qmin)2.0 1.6 1.3 1.0
10 3020 40 t [ms]
30
10
20
0
p
[bar]
Operating Instructions OIO 20en Edition 2020-05 9
Noise levels
Technical data
Substitute operating data
The following table shows standardized values for the flow rate, temperature and viscosity. These values
can be used at the same time as maximum values without impairing the service life of the flowmeter. In
addition, the operating limits of the corresponding end connection, of the sealing material and of the
connection box or Smart Solution electronic unit are to be observed.
Tab. 2 Substitute operating data
Noise levels
The sound pressure level of the flowmeter amounts to less than 70 dB(A).
Heating system
A heating system is not installed at the factory. The customer can optionally fit OME-series flowmeters
with a trace heating system. The manufacturer recommends heating systems for high-viscosity liquids
that do not flow sufficiently if not heated, because bearing damage and destruction of the device may
otherwise result.
Trace heating system
Contact the manufacturer before installing a trace heating system.
OME 13 OME 20 OME 32 OME 52
Flow rate
Qmax [l/min] 10 30 100 350
Qnenn 10 30 100 350
Qmin 0.2 0.6 2.0 7.0
Pressure max. [bar] 40 40 40 40
Temperature
min. – max. [°C] -20...+125
Viscosity
min. – max. [mm2/s] 1 – 50
1Heat insulation
2Trace heating
3Piping
4Flowmeter
5Connection box/Smart
Solution electronic unit
XArea stringently without
heat insulation
Fig. 2 Flowmeter with trace heating system
3
1
2
1
3
5
44
X
10 OIO 20en Edition 2020-05 Operating Instructions
Dimensions and weights
Technical data
► Ensure that connection box or Smart Solution electronic unit 5 and corresponding cables are not
heat insulated. The area X has to be free of heat insulation, see Fig. 2, page 9.
Dimensions and weights
OME with connection box and BSPP thread connection
Tab. 3 Dimensions and weights OME with connection box and pipe thread connection
CAUTION
Defective connection box/Smart Solution electronic unit or cabling due to exceeding of the maximum
temperature.
► Do not heat the connection box/Smart Solution electronic unit and corresponding cables above
the maximum temperature.
► Observe the values in the corresponding table, see Tab. 7, page 14.
Fig. 3 Dimensional drawing OME with connection box and pipe thread
DK Diameter cable 13 mm
OME 13 OME 20 OME 32 OME 52
G[inch] 1/2" 3/4" 1" 1 1/2"
Pressure stage [bar] 40 40 40 40
D[mm] 45 x 45 55 x 55 70 x 70 110 x 110
L1 [mm] 110 145 200 310
L2 [mm] 65 95 140 225
H1 [mm] 82 92 107 147
H2 [mm] 59.5 64.5 72.0 92.0
Mass [kg] 0.7 1.2 3.0 9.0
G
D
L1
H1
H2
L2
DK
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