Kracht VOLUMEC AVC 02.1 User manual

D.0030390002
Operating instructions (Translation)
VOLUMEC Valve Position Indicator 02/04
88030390002-03
Englisch
2022-07-08

Table of Content
1 General 4
1.1 About the documentation 4
1.2 Manufacturer´s address 4
1.3 Intended use 4
2 Safety 6
2.1 Symbolism 6
2.2 Personnel qualification and training 6
2.3 Basic safety instructions 7
2.4 Warning 7
3Device description 9
3.1 Basic construction and function 9
3.2 Basic design 10
3.2.1 Indicator AVC 02.1 10
3.2.2 Indicator AVC 02.4 11
3.2.3 VCM 12
3.2.4 HB 4.0311. 13
3.2.5 HB 4.0324. 14
3.3 Type key 15
3.3.1 Indicator AVC 15
3.3.2 Volume counter VCM 16
3.3.3 Valve block HB 4 17
3.4 Function diagram 17
4 Technical data 18
4.1 General information 18
4.2 Hydraulic parameters 18
4.3 Electrical parameters 19
4.3.1 KEMA-acceptance 19
4.4 Dimensions 20
5Transport and storage 21
5.1 General 21
6 Installation 22

6.1 General 22
6.2 Electrical connection 22
7 Operation start-up 23
7.1 Safety instructions for start-up 23
7.2 Further operation start-up 23
7.3 Permissible limits for operation 23
8 Removal 24
8.1 General 24
8.2 Removing the device 25
9 Technical data 26
9.1 General 26
9.2 Unusual noise 27
9.3 Static seals 27
9.4 Screw joints 28
9.5 Surface temperature 28
10 Repairs 29
10.1 General 29
10.2 Troubleshooting 30
10.3 Elimination of damage 30
10.4 Return 31
10.5 Disposal 31
10.6 Detecting and eliminating failures 31
11 Appendix 33

1 General
1.1 About the documentation
These operating instructions describe the installation, operation and mainte-
nance of the following device:
VOLUMEC Valve Position Indicator 02/04
The device is manufactured in different versions. Information about the ver-
sion concerned in the individual case can be found on the device's type plate.
The structure of the type designation and a more detailed description of the
individual series and nominal sizes can be found in the chapter 3 “Device
description” and in the chapter 4 “Technical data”.
If you have any questions about this operating manual, please contact the
manufacturer.
1.2 Manufacturer´s address
KRACHT GmbH
Gewerbestraße 20
DE 58791 Werdohl
phone: [phone]
fax: [phone]
email: [email protected]
web: www.kracht.eu
1.3 Intended use
1. The device is used to measure and display the displacement distance of
hydraulic activated ship fittings for ballast, cargo or stripping systems.
The position of the fitting is measured and optically displayed on the de-
vice and output as an analogue signal.
2. The display of the volumetric-recorded valve position can be read visu-
ally onsite or tapped electrically through a potentiometer and/or limit
switch.
3. Comply with the permissible operating data.
4. Comply with the permissible mounting position.
5. The electronic device has been constructed according to the latest tech-
nical standard. Only use it:
○in a perfect technical condition,
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○intended use,
○conscious of safety and danger, taking the operating instructions
into account.
6. The device may only be used when it is in a proper condition.
7. Deviationsfromtheoperatingconditionsrequireexpressapprovalbythe
manufacturer.
8. Type plates or other references on the device must not be removed nor
made illegible resp. unrecognisable.
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2 Safety
2.1 Symbolism
DANGER
Identificationof an immediatehazard, which wouldresult in deathor severe
bodily injury if not avoided.
WARNING
Identification of a potential medium risk hazard, which would lead to death
or severe bodily injury if not avoided.
CAUTION
Identification of a low risk hazard, which could lead to minor or medium
bodily injury if not avoided.
NOTICE
Flagging of notices to prevent property damage.
Identification of basic safety instructions. Non-compliance can lead to haz-
ards for people and the device.
Flagging of special user tips and other especially useful or important infor-
mation.
2.2 Personnel qualification and training
The staff designated to assemble, operate and service the device must be
properly qualified. This can be through training or specific instruction. Per-
sonnel must be familiar with the contents of this operating instructions.
Read the operating instructions thoroughly before use.
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2.3 Basic safety instructions
1. Comply with existing regulations on accident prevention and safety at
work along with any possible internal operator regulations.
2. Pay attention to the greatest possible cleanliness.
3. Wear suitable personal protection equipment.
4. Do not remove, make illegible or obliterate type plates or other referen-
ces on the device.
5. Do not make any technical changes on the device.
6. Maintain and clean the device regularly.
7. Use spare parts approved by the manufacturer only.
2.4 Warning
WARNING
Malfunction!
Riskofinjuryduetooperatingmistakesorfailureoftheunitwhencontrolling
plants or process sequences.
1. Suitable safety precautions must be taken when the device is used.
2. In case of a fault or change of the operating behaviour, put the unit out
of service.
DANGER
Exposed electrical components!
Danger of death due to electric shock.
1. Follow the special safety regulations during all work on electrical instal-
lations.
2. Only allow electricians to work on electrical systems.
3. Only use connection lines that are resistant to ambient influences and
media.
DANGER
Danger through changes!
In the case of changes (including operating behaviour) that can impair
safety, the device can be damaged or functional problems can lead to ac-
cidents with serious injuries or death.
1. Switch the device off immediately in the case of any changes.
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WARNING
Hazard due to pressurized parts
Danger of injury from spurting fluids.
1. Depressurize the connection lines and keep the connection lines dep-
ressurised during all work on the device.
2. Wear suitable protective equipment.
WARNING
Failure of load-carrying parts due to overload!
Danger of injury from flying parts.
Danger of injury from spurting fluids.
1. Use only connections and lines approved for the expected pressure
range.
2. Securely prevent exceeding the permissible pressure, e.g. by using
pressure relief valves or rupture discs.
3. Design pipework so that no tensions, e.g. caused by changes in length
due to fluctuations in temperature, are transmitted to the device.
CAUTION
Hot surfaces!
Burn injury to skin if touched.
1. Take measures against accidental touching of hot surfaces (> 60 °C).
CAUTION
Hot surfaces!
Burn injury to skin if touched.
1. At temperatures ≥48°C the device must be allowed to cool down first.
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3 Device description
3.1 Basic construction and function
The device is operated together with a type VCM volumetric meter and by
type HB 4 hydraulic block.
The VCM hydraulically records the movement of an actuator and transmits it
using a permanent-magnetic coupling to the device gearbox. The gear ratio
is designed for a dial train of 180° so it is adapted to the volume that is dis-
placed during the actuator movement of one final position into the other.
The output axle of the magnetic coupling is additionally provided with an in-
dicator, which makes the rotary movement of the VCM visible. The display
decive is completely isolated from the hydraulic circuit.
The actuator is moved hydraulically through Valve block HB 4, which has to
be completed with a directional valve and mounted on a connecting plate.
The HB 4 includes a shock valve for pressure safeguarding and an anti-cav-
itationvalve, which isneeded during temperaturefluctuations. In addition,the
HB4isprovidedwithaflow-controlscrewwhichdampensthevolumetric-flow
peaks, which can occur when switching the valve.
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3.2 Basic design
3.2.1 Indicator AVC 02.1
Description
10. Gear housing 70. Male socket
20. Cover 80. Contact plate
30. Indicator glass 90. Contact pointer
40. Measuring gear 100. Indicator signal
50. Magnet 110. O-Ring
60. Potentiometer 120. Seal
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3.2.2 Indicator AVC 02.4
Description
10. Gear housing 70. Male socket
20. Cover 80. Contact plate
30. Indicator glass 90. Contact pointer
40. Measuring gear 100. Indicator signal
50. Magnet 110. O-Ring
60. Potentiometer 120. Seal
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3.2.3 VCM
Description
10. Housing 60. Bearing pin
20. Cover 70. Magnet
30. Gear 80. Socket head cap screw
40. Plain bearing bush 90. O-Ring
50. Plain bearing bush 100. O-Ring
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3.2.4 HB 4.0311.
Description
10. Housing 80. Draw spring
20. Change-over piston 90. Screw plug
30. Valve cone 100. Flow restrictor
40. Guide sleeve 110. Flow-control screw
50. Compression spring 120. Expander plugs
60. Excess-pressure valve 130. O-Ring
70. Anti-cavitation valve
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3.2.5 HB 4.0324.
Description
10. Housing 60. Screw plug
20. Compression spring 70. Flow restrictor
30. Excess-pressure valve 80. Flow-control screw
40. Anti-cavitation valve 90. Expander plugs
50. Draw spring 100. O-Ring
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3.3 Type key
3.3.1 Indicator AVC
Ordering example
AVC 02 A 1 O 1 U...:1
1. 2. 3. 4. 5. 6. 7.
Explanation of type key
1. Product name
2. Nominal size
02 for VCM 02 and VCM 04
3. Indicator type
AOptical display
without elektric BOptical display With limit switch
CL Optical display
Conductive plastic potentiometer DL Optical display Conductive plastic potentiometer and limit
switch
4. Construction type
1AlMgSi (Standard) 4Brass CW710R / 2.0540
(seawater resistant)
5. Electrical connection
Owithout elektric AAttaching plug Series 723
5-pin (Standard)
BAttaching plug DIN EN 175301-803
(old DIN 43650) EKEMA-acceptance
6. Design serial number (specified by manufacturer)
7. Transmission gears
e.g. U 98.3:1 (will be selected by KRACHT)
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3.3.2 Volume counter VCM
Ordering example
VCM 02 N 1 P 1 S
1. 2. 3. 4. 5. 6. 7.
Explanation of type key
1. Product name
2. Nominal size
02
04
3. Seal
NNBR FFKM
4. Construction type
1EN-GJL-250 / AL 2Brass CW710R/2.0540
AL ENAW-6082
(seawater resistant)
5. Type of connection
PPlate structure
6. Design serial number (specified by manufacturer)
7. Function
SStandard RWith notch
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3.3.3 Valve block HB 4
Ordering example
HB 4 A 0311 A . .
1. 2. 3. 4. 5. 6.
Explanation of type key
1. Product name
2. Construction type
3. Function
0311
0324
4. Design serial number (specified by manufacturer)
5. Temperature-specific pressure limitation
110 pmax = 110 bar 240 pmax = 240 bar
180 pmax = 180 bar
6. Seal
No specification NBR FKM FKM
3.4 Function diagram
Hydraulic schematic
The dimensions of the hydraulic schematic can be found in the relevant
technical data sheets.
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4 Technical data
4.1 General information
General information VOLUMEC
Hole pattern / Nominal size ISO 4401 / DIN 24340-A6
Connection type Connection plate
(not included in the scope of delivery)
Mounting position Any
Ambient temperature -20°C ... +60°C
4.2 Hydraulic parameters
Hydraulic parameters VOLUMEC
Geom. tooth volume VCM 02 Vgz = 0.25 cm3
VCM 04 Vgz = 0.50 cm3
Max. Volumetric flow VCM 02 ϑ= 4 l/min
VCM 04 ϑ= 7 l/min
Max. operating pressure pmax 200 bar
Opening pressure pressure-relief valve pmax,DBV 240 / 180 / 110 bar
(see section 3.3.3 “Valve block HB 4”)
Hydraulic fluids Mineral oil according to DIN 51524/25
Fluid temperature range -20°C ... +80°C
Viscosity 20 mm2/s ... 380 mm2/s
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4.3 Electrical parameters
Electrical data Conductive plastic potentiometer
Connection resistance 1 kΩ
Resistance tolerance ± 20%
Linearity ± 2%
Max. wiper current 1 mA
Power rating 0.2 W / 55°C
Dielectric strength 500 Veff / 1 min
Isolation resistance > 1 GΩbei 500 DVC
Resistance resolution -
Operating temperature -55°C ... +105°C
Climatic test class 55/150/56
Protection class IP67
Vibrations 10 G
(30...2000 Hz / 0.75 mm)
Shock 50 G
(Semi-sinusoidal, 7ms)
4.3.1 KEMA-acceptance
Input circuit (connector); in type of protection intrinsic safety Ex ia IIC, only for connection to a
certified intrinsically safe circuit, with the following maximum values:
Electrical data
Voltage Ui30 V
Current IiAny
Power PiSee table below
Capacitance Ci0 nF
Inductance Li0 µH
Ambient temperature - Power assignment
Ambient temperature ϑu[°C] 40 50 60 70 80
Power Pi[W] 1.3 1.25 1.2 1.1 1.0
Every KEMA marked device was routine tested to withstand 500 V AC for
1 minute, between electrical parts and earth/enclosure.
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CAUTION:
If the equipment it is mounted in an area where EPL Ga apparatus is required, it must be installed
such that even in the event of rare incidents, ignition sources due to impact and friction sparks on
the connector are excluded. This is because the enclosure cover is aluminium and the connector
may also contain contents of aluminium >10%.

4.4 Dimensions
Dimensions of the device can be found in the relevant technical data sheets.
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