KRAL CG Series User manual

www.kral.at
Operating Instructions
KRAL Screw Pumps.
CG Series with magnetic coupling.
OIC 10en
Edition 2019-11
Original instructions

2 OIC 10en Edition 2019-11 Operating Instructions
Table of contents
KRAL Screw Pumps – CG Series
About this document
□General information 3
□Target groups 3
□Symbols 3
□Danger levels 4
□Associated documents 4
Safety
□Proper use 5
□General safety instructions 5
□Safety instructions for magnetic coupling
systems 5
Identification
□Type code 6
□Rating plate 7
Technical data
□Operating limits 8
□Sound pressure level 8
□Required NPSH values 9
□Weights 10
Function description
□Structure 11
□Magnetic coupling 12
□Overflow valve 13
□Heating system 14
▪Electric heating system 14
▪Fluid heating system 14
▪Heating system special design 14
Transportation, storage and disposal
□Safety instructions on transportation,
storage and disposal 15
□Unpacking and checking the state of
delivery 15
□Lifting the pump/pump unit 15
□Storage 16
□Preservation 16
▪Preserving the internal surfaces
of the pump 17
▪Preserving the external surfaces
of the pump 17
▪Removing the preservation 17
□Disposing of the pump 18
Installation, removal and connection
□Safety instructions on installation, removal
and connection 19
□Installation 19
▪Installing the pump 19
▪Protect the pump against soiling 20
▪Connecting the pump to the pipe system 20
▪Assembling the pump and motor 20
□Connecting the motor 21
□Removing the pump 21
Operation
□Safety instructions on operation 22
□Commissioning 22
▪Cleaning the pipe system 22
▪Filling the pump 23
▪Checking the direction of rotation 24
▪Commissioning the pump 25
□During operation 26
▪Checking the operating pressure 26
▪Adjusting the overflow valve 26
▪Switching off the pump 27
□Taking the pump out of operation 27
□Recommissioning the pump 27
Maintenance
□Safety instructions on maintenance and
repairs 28
□Required maintenance 28
▪Ball bearing 28
▪Magnetic coupling 28
□Replacing the magnetic coupling 29
▪Removing the magnetic coupling 29
▪Installing the magnetic coupling 31
□Replacing the ball bearing and screw set 35
▪Removing the ball bearing and
screw set 35
▪Installing the ball bearing and screw set 37
Troubleshooting
□Information about faults 39
▪Possible faults 39
▪Troubleshooting 39
Spare parts
□Cartridge pump 42
□Pumpe with magnetic coupling 43
□Overflow valve 44
Appendix
□Tightening torques 45
□Contents of the EC Declaration of
Conformity 46
□Notes 47

Operating Instructions OIC 10en Edition 2019-11 3
General information
About this document
About this doc ument General information
The operating instructions form part of the pump or of the pump unit and must be kept for future refe-
rence. Furthermore please observe the associated documents. The CG series with mechanical seal/
radial seal ring is described in separate operating instructions.
Target groups
Symbols
Target group Tasks
Operator-owner □Keep these instructions available at the system site for future refe-
rence.
□Ensure that employees read and observe these instructions and the
associated documents, in particular the safety instructions and war-
nings.
□Observe additional system-specific directives and regulations.
Specialist personnel, fit-
ters
□Read, observe and follow these instructions and the associated docu-
ments, in particular the safety instructions and warnings.
Symbol Meaning
Warning personal injury
Notice
Procedures mechanical installation
Procedures electrical installation
Check or fault table
Safety instructions for persons with pacemakers
Request for action

4 OIC 10en Edition 2019-11 Operating Instructions
Danger levels
About this document
Danger levels
Associated documents
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
ATEX supplementary instructions for operation in potentially explosive areas
Declaration of conformity according to EU Directive 2006/42/EC
Declaration of conformity according to EU Directive 2014/34/EU
Manufacturer's declaration according to EU Directive 2014/68/EU
Technical documentation for supplied components

Operating Instructions OIC 10en Edition 2019-11 5
Proper use
Safety
Safety Proper use
□Use the pump solely for transporting lubricating liquids that are chemically neutral and that contain
no gas or solid components.
□Use the pump only within the operating limits specified on the rating plate and in the "Technical data"
section. In the case of operating data that does not agree with the specifications on the rating plate,
please contact the manufacturer.
□The pump is designed specially for the operating pressure named by the customer. If the actual ope-
rating pressure deviates notably from the design pressure, damage can also arise within the speci-
fied operating limits. This applies both to notably higher as well as to notably lower operating pressu-
res. Under no circumstances should the operating pressure drop below the minimum pressure of
2 bars. In case of any doubt, please contact the manufacturer.
General safety instructions
Safety instructions for magnetic coupling systems
Magnetic fields from magnetic coupling systems (MCS) can influence the function and operational saf-
ety of electrical and electronic devices. The following safety instructions must be observed.
The following general 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.
□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 specifications of the installation
location.
□In case of systems with an increased potential of danger to humans and/or machines the fai-
lure of a pump may not lead to injuries or damage to property.
▪Always equip systems with an increased potential of danger with alarm equipment.
▪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 regulations for handling dangerous materials.
□Pumped liquids can be subject to high pressure and can cause damage and/or personal
injury should leaks occur.
Additional safety instructions for magnetic coupling systems:
□Keep the MCS away from pacemakers. There is a danger to life!
▪Under no circumstances may persons with pacemakers perform installation, dismantling or
maintenance work.
□Persons with pacemakers must comply with the following safe distances to the MCS:
▪3 m distance to the openly accessible MCS
▪1 m distance to pump units with installed MCS
□Do not bring the MCS in the immediate area of PCs, data carriers and other electronic com-
ponents.
□Keep the MCS away from clocks, magnetized tools and measuring equipment as well as all
magnetizable parts.
□Do not bring both the MCS parts together, as this can destroy the magnetic coupling system.

6 OIC 10en Edition 2019-11 Operating Instructions
Type code
Identification
Identification Type code
1Model
2Size
3Seal type
4Bearing and heating system
5Housing material
6Pressure stage
7Completion
8Version index
Fig. 1 Type code
Item Designation Type
1Model CGF □Pump with free shaft end
□Pump housing with flanges in inline configuration
□Pump unit with or without pump bracket foot
CGH □Pump with free shaft end and foot
□Pump housing with flanges in inline configuration
□Pump unit with base frame for horizontal mounting
CGV □Pump with free shaft end and pedestal
□Pump housing with flanges in inline configuration
□Pump unit with pedestal for vertical mounting
CGS □Pump with free shaft end in special design
□Pump housing with overhead flanges
□Pump unit in special design
2Size Corresponds to the delivery rate in [l/min] at 1450 min-1
3Seal type A: Standard mechanical seal
B: Mechanical seal of hard material
C: Standard radial shaft seal
D: Magnetic coupling
E: Mechanical seal with quench
F: PTFE seal with quench
G: Radial shaft seal, high temperature
H: Mechanical seal balanced
J: Stuffing box packing
X: Special design
4Bearing and
heating system
A: Inside bearing without heating system
B: External bearing without heating system
C: Inside bearing with electric heating system
D: External bearing with electric heating system
E: Inside bearing with fluid heating system
F: External bearing with fluid heating system
X: Special design
CGF- 370.DAADF.00599
1
2
3
4
5
68
7

Operating Instructions OIC 10en Edition 2019-11 7
Rating plate
Identification
Tab. 1 Type code
Rating plate
5Housing mate-
rial
A: Screw housing Silafont, outer housing nodular cast iron, PN40
B: Screw housing nodular cast iron, outer housing nodular cast iron, PN40
C: Screw housing Silafont, outer housing nodular cast iron, PN63
D: Screw housing nodular cast iron, outer housing nodular cast iron, PN63
E: Screw housing Silafont, outer housing steel
F: Screw housing nodular cast iron, outer housing steel
X: Special design
6Pressure stage
and material
overflow valve
Bypass valve nodular cast iron
A: 0.0 – 9.9 bar, up to size CG 210
B: 0.0 – 5.9 bar, up to size CG 235
C: 6.0 – 9.9 bar, up to size CG 235
D: 10.0 – 15.9 bar
E: 16.0 – 24.9 bar
F: 25.0 – 40.0 bar
Return valve nodular cast iron
G: 0.0 – 9.9 bar, up to size CG 210
H: 0.0 – 5.9 bar, up to size CG 235
J: 6.0 – 9.9 bar, up to size CG 235
K: 10.0 – 15.9 bar
L: 16.0 – 24.9 bar
M: 25.0 – 40.0 bar
N: Steel
X: Special design
Z: Without valve
7Completion P: Pump with free shaft end
K: Pump unit with coupling and pump bracket, without motor
F: Pump unit with coupling and pump bracket, with motor
8Version index For internal administration
1Construction year
2Max. operating overpressure suction-side /
Max. operating overpressure pressure-side
3Temperature range
4Serial number
5Type
6Article number
7Differential pressure
8Nominal delivery rate
9Rated speed
10 Nominal viscosity
11 Weight
Fig. 2 Rating plate
Item Designation Type
KRAL GmbH, 6890 Lustenau, Austria www.kral.at
pS max. / pDmax.
Ty p |Type
SN | Serial no.
Tmin. / Tmax. ºC
l/min
mm²/s
kg
min-¹
bar
bar
Δp
Jahr |Year Gewicht | Weight
n
Q
Art.-Nr. | Item no.
1
2
3
4
5
6
7
8
9
10
11

8 OIC 10en Edition 2019-11 Operating Instructions
Operating limits
Technical data
Technic al data Operating limits
Tab. 1 Operating limits
Sound pressure level
Guide values at 1 m distance, 1450 min-1, 20 bar, 21 mm2/s
Tab. 2 Sound pressure level
Size
15
20
26
32
42
55
74
85
105
118
160
210
235
275
370
450
550
660
880
851
951
1101
1301
1501
1701
2250 2850
3550
Pressure max.
[bar]
□Outer housing
spheroidal gra-
phite iron
63 40 —
□Outer housing
steel
100
Temperature max.
[°C]
□Magnetic cou-
pling
as standard
180
□Magnetic cou-
pling
high temperature
250
Temperature min.
[°C]
for pump materials -10
Viscosity [mm2/s]
min.* – max. 3 – 7000 3 – 5000
Rotation speed
[min-1]
Depending on viscosity, suction head/NPSH value and size.
In case of any doubt, please contact the manufacturer.
Feed pressure
[bar]
Up to 16
* Lower values on request
Sound pressure level max. ±3 [dB(A)]
Size 15–42 55-118 160-275 370-450 550-880 851-
1301
1501-
1701
2250-
3350
Pump max. 56.0 61.0 66.0 69.0 72.0 77.0 79.0 86.0
Motor max. 53.0 58.0 65.0 68.0 69.0 67.0 72.0 77.0
Pump + motor 58.0 63.0 68.5 71.5 74.0 77.5 80.0 86.5

Operating Instructions OIC 10en Edition 2019-11 9
Required NPSH values
Technical data
Required NPSH values
The following table lists the required NPSH values during operation with a low-volatile liquid such as
lubricating oil or hydraulic fluid. When pumped liquids have a readily volatile component content, the
required NPSH values increase notably:
□Fuel oil requires an NPSH value of at least 6 mWC.
□When the pumped liquids contains water (e.g. heavy fuel oil), the values in the table have to be
increased by the vapor pressure of the water at the specified operating temperature.
The required NPSH values also needs to be increased if there are gas contents, whether dissolved or
not. In case of any doubt, please contact the manufacturer.
Size Viscosity NPSH value [mWC] at Size Viscosity NPSH value [mWC] at
[mm2/s] Rotation speed [min-1][mm2/s] Rotation speed [min-1]
1450 1750 2900 3500 1450 1750 2900 3500
15 62.0 105 62.0 2.7 3.2
37 2.0 37 2.0 2.2 3.0 3.6
152 2.0 2.2 152 2.4 2.6 3.6 4.4
380 2.0 2.6 3.0 380 2.8 3.1 4.4 5.4
20 62.0 118 62.0 3.1 3.9
37 2.0 37 2.2 3.5 4.4
152 2.0 2.4 2.7 152 2.5 2.8 4.3 5.4
380 2.2 2.4 3.2 3.8 380 3.0 3.3 5.3 6.8
26 62.0 2.4 2.7 160 62.0 2.9 3.6
37 2.0 2.6 3.0 37 2.0 3.3 4.0
152 2.2 2.4 3.1 3.7 152 2.5 2.7 3.9 5.0
380 2.6 2.8 3.8 4.4 380 2.9 3.2 4.9 6.2
32 62.0 210 62.1 4.0 5.2
37 2.0 37 2.4 2.7 4.5 6.0
152 2.0 2.3 2.6 152 2.8 3.2 5.5 —
380 2.2 2.4 3.1 3.7 380 3.5 4.0 6.9 —
42 62.0 2.3 235 62.0 3.5 4.5
37 2.0 2.1 2.6 37 2.3 2.5 4.0 5.1
152 2.0 2.8 3.5 152 2.7 3.0 4.9 —
380 2.5 2.7 4.0 4.8 380 3.2 3.6 —
55 62.0 275 62.3 4.5 6.18
37 2.0 2.7 37 2.5 2.9 5.1 7.0
152 2.1 2.8 3.3 152 3.0 3.5 6.3 —
380 2.5 2.7 3.5 4.0 380 3.6 4.2 —
74 62.0 2.6 3.0 370 62.2 4.2 5.7
37 2.0 2.9 3.4 37 2.5 2.8 4.8 6.5
152 2.3 2.5 3.3 4.1 152 2.9 3.3 5.9 —
380 2.7 3.0 4.4 5.0 380 3.6 4.0 —
85 62.0 2.8 3.4 450 62.5 3.0 5.8 8.3
37 2.0 3.1 3.8 37 2.8 3.3 6.7 —
152 2.4 2.6 3.8 4.6 152 3.3 4.0 —
380 2.8 3.1 4.6 5.8 380 4.0 4.9 —

10 OIC 10en Edition 2019-11 Operating Instructions
Weights
Technical data
Tab. 3 Required NPSH values
Weights
No standard values can be specified here in view of the wide range of variations arising from the indivi-
dual customer-specific designs of the Series CG pumps. In case of any doubt, please contact the manu-
facturer.
550 62.4 2.8 5.0 7.1 1301 64.0 5.0 —
37 2.7 3.1 5.8 —37 4.5 5.7 —
152 3.2 3.7 7.2 —152 5.4 6.8 —
380 3.9 4.5 —380 7.0 —
660 62.8 3.4 7.4 —1501 64.3 5.7 —
37 3.1 3.8 —37 4.8 6.9 —
152 3.8 4.6 —152 5.6 —
380 4.6 5.8 —380 —
880 63.7 4.9 —1701 65.5 6.8 —
37 4.2 5.5 —37 6.0 7.5 —
152 5.2 6.9 —152 7.0 —
380 6.4 8.7 —380 —
851 63.2 3.7 —2550 64.5 6.1 —
37 3.5 4.1 —37 5.1 7.0 —
152 4.1 4.4 —152 6.3 8.8 —
380 4.8 5.8 —380 8.0 —
951 63.6 4.4 —2850 64.1 5.5 —
37 4.0 4.9 —37 3.6 6.3 —
152 4.8 5.9 —152 5.7 7.8 —
380 5.8 7.3 —380 7.2 —
1101 63.0 3.7 —3550 65.8 8.3 —
37 3.4 4.2 —37 6.6 9.6 —
152 4.1 5.1 —152 8.2 —
380 5.0 6.3 —380 —
Size Viscosity NPSH value [mWC] at Size Viscosity NPSH value [mWC] at
[mm2/s] Rotation speed [min-1][mm2/s] Rotation speed [min-1]
1450 1750 2900 3500 1450 1750 2900 3500

Operating Instructions OIC 10en Edition 2019-11 11
Structure
Function description
Function description Structure
Screw pumps are rotating displacement pumps whose displacement effect results from the meshing of
three rotating screws and the enclosing housing. The radial support of the screws is effected by the sli-
ding contact in the housing which requires lubrication by the pumped liquid. Screw pumps are therefore
not suitable for dry running and can only be used up to specific pressure and viscosity limits. Due to the
narrow tolerances, pumping of suspended solids is not possible.
Axial support of the main screw is carried out by a deep-groove ball bearing. In order to reduce the pres-
sure, a balancing cylinder is mounted at the main screw. An integrated overflow valve protects against
excessive pressure that could cause housing parts to burst.
Standard direction of rotation: clockwise, viewed from the drive
marked on the housing by an arrow, see Fig. 2, page 24.
Flow direction: marked on the housing by two arrows, see Fig. 2, page 24.
Fig. 1 Structure of CG pump
1End cover
2Vent hole
3Valve cap
4Adjusting screw
5Valve cover
6Spring
7Screw plug
8Valve housing
9Valve body
10 Flange cover cartridge pump
11 Intermediate flange
12 Ball bearing
13 Main screw
14 Balancing cylinder
15 Cartridge pump
16 Clamping plate
17 Outer housing
1
2
3
4
6
78 7
2
10
11
12 13
14
15
2
16
17
2
5
9

12 OIC 10en Edition 2019-11 Operating Instructions
Magnetic coupling
Function description
Magnetic coupling
The shaft end of the pump 1 is enclosed by a containment can 2, that is connected air-tight with the
motor-side flange of the pump. Therefore, it is not necessary to seal a rotating free shaft end against a
stationary seal housing. Special rotors equipped with powerful permanent magnets are used for transfer
of torque from the motor to the pump. The inner rotor 3 is fixed at the shaft end and driven by the outer
rotor 4, which in turn is fixed to the shaft of the motor 5. The torque is thus transferred contact-free by
means of the magnetic field between the outer and inner rotor.
The containment can is made of a non-magnetic stainless steel which does not impede the forming of
magnetic flux lines between the rotors. The pressure discharge of the containment can occurs via a core
drilled hole in the main screw. The pressure in the containment can corresponds approximately to the
pressure on the suction side of the pump.
Fig. 2 Structure of a CG pump with magnetic coupling and motor
1 Pump
2Containment can
3Inner rotor
4 Outer rotor
5 Motor
12345

Operating Instructions OIC 10en Edition 2019-11 13
Overflow valve
Function description
Overflow valve
The overflow valve ensures that high pressures that can result in housing parts bursting do not result.
The valve is a safety element and should not be used for control or regulation such as maintaining pres-
sure. If the valve is kept open for long under adverse operating conditions (high differential pressures
and/or low viscosities) it will only take a few minutes for the valve and the valve seating to become
damaged. As a result, the valve leaks permanently and there is a reduction in the delivery rate. In addi-
tion to this, circulation through the overflow valve for too long heats the pump to excess. This reduces
viscosity and can lead to pump failure.
It therefore has to be ensured at the system that the maximum operating pressure always lies under the
operating pressure of the overflow valve.
Valve types:
□Bypass valve
□Return valve
Factory setting:
□110% of the nominal pressure
Setting of the overflow valve, see "Adjusting the overflow valve", page 26.
The following safety instructions must be observed:
□Pumps of the series CG are only equipped with an overflow valve up to an operating pressure of
about 40 bar.
► An external overflow valve has to be installed at pumps that are supplied without an overflow
valve.
1Valve cap
2Adjusting screw
3Valve cover
4Spring
5Screw plug
6Valve body
7Valve housing
Fig. 3 Overflow valve mounting position
755421 36

14 OIC 10en Edition 2019-11 Operating Instructions
Heating system
Function description
Heating system
The pumps can be equipped optionally with heating systems. The manufacturer recommends heating
systems for high-viscosity liquids that do not flow sufficiently if not heated. This can result in excessive
power consumption or to problems arising through cavitation or sealing.
Method of heating:
□Electric heating system
□Fluid heating system
□Heating system special design
No standard values can be specified here in view of the wide range of variations arising from the indivi-
dual customer-specific designs of the Series CG pumps. In case of any doubt, please contact the manu-
facturer.
► If a heating is used, observe the permissible operating limits of the pump, see Tab. 1, page 8.
Electric heating system
Please contact the manufacturer for the electric heating system.
Fluid heating system
Please contact the manufacturer for a fluid heating system.
Heating system special design
Please contact the manufacturer for special designs.
WARNING
Danger of the pump housing bursting and danger of injury through emitted pumped liquid through the
heat expansion of the pumped liquid.
► Open all the valves during the heating process.

Operating Instructions OIC 10en Edition 2019-11 15
Safety instructions on transportation, storage and disposal
Transportation, storage and disposal
Transportation, storage and disposal Safety instructions on transportation, storage and disposal
Unpacking and checking the state of delivery
1. On delivery unpack the pump/pump unit and check for damage during transportation.
2. Report damage during transportation immediately to the manufacturer.
3. Dispose of packing material in accordance with the locally applicable regulations.
Lifting the pump/pump unit
The following safety instructions must be observed:
□There is a risk of death for people with pacemakers.
► Under no circumstances may persons with pacemakers perform transport, storage and disposal
work.
Fig. 1 Fastening of hoisting equipment (princi-
ple diagram)
Fig. 2 Fastening of hoisting equipment (princi-
ple diagram)
Fig. 3 Fastening of hoisting equipment (princi-
ple diagram)
Fig. 4 Fastening of hoisting equipment (princi-
ple diagram)

16 OIC 10en Edition 2019-11 Operating Instructions
Storage
Transportation, storage and disposal
Prerequisites:
□Sufficiently dimensioned hoisting equipment
□The used hoisting equipment conforms to the local regulations and regulations for the prevention of
accidents
Pump
1. Screw eye bolts into two opposing holes at the flange cover, see Fig. 1, page 15.
2. Hang the slinging devices into the eye bolts.
3. Hang the crane hook into the slinging devices and lift the pump.
Pump unit
1. CGF model:Fasten the slinging devices at the pump unit at an angle between 60° and 90°, see
Fig. 2, page 15. Ensure that the center of gravity of the pump unit lies between and below the attach-
ment points. If this is not possible, take other suitable measures to prevent the pump unit from tilting.
CGH model: Screw eye bolts into the four holes on the base frame and hang the slinging devices
into the eye bolts, see Fig. 3, page 15.
CGV model: Sling the slinging devices around the pump bracket, see Fig. 4, page 15
2. Hang the crane hook into the slinging devices and lift the pump unit.
Storage
During the test run, the internal components of the pump are wetted with test oil, which has a preserva-
tive effect. The pipe connections are fitted with protective caps. Unless otherwise specified, the external
components of the pump are preserved with a single-coat PU-based two-component paint. The preser-
vative applied at the factory will protect the pump for about six weeks, if it is stored in a dry and clean
location. The manufacturer offers a long-term preservation for storage times of up to 60 months. The
pump is additionally packed in hermetically sealing anti-corrosion paper.
Notice: Store the preserved pump cool and dry and protect it against direct sunlight.
Preservation
Preservation has to be carried out additionally under the following conditions:
Tab. 1 Check table for preservation
DANGER
Risk of injury and/or damage to equipment should the pump/pump unit fall.
► Use intact and correctly dimensioned hoisting equipment.
► Attach the hoisting equipment correspondingly.
► Secure motors additionally against tilting.
► Do not stand under raised loads.
Type of delivery Condition
Standard delivery □Storage time exceeding six weeks
□Unfavorable storage conditions such as high
humidity, salty air, etc.
Delivery with long-term preservation □Opened or damaged packaging

Operating Instructions OIC 10en Edition 2019-11 17
Preservation
Transportation, storage and disposal
Preserving the internal surfaces of the pump
Aids:
□Non-corrosive and resin-free preservative oil
1. Close the suction connection of the pump with a blind flange.
2. Pour non-corrosive, resin-free preservative oil into the pressure connection until it reaches approx. 2
cm under the pressure flange, while slowly turning the main screw against the direction of rotation.
3. Close the pressure connection of the pump with a blind flange.
After about 6 months storage check the preservative oil level and if necessary top up.
Preserving the external surfaces of the pump
Aids:
□Preservative (e.g. Castrol Rustilo DWX 33)
► Paint or spray the preservative onto all plain and unpainted parts.
At intervals of about six months check the preservation and if necessary repeat.
Notice: Store the preserved pump cool and dry and protect it against direct sunlight.
Removing the preservation
Aids:
□Solvent
□Steam-jet cleaning device with wax-dissolving additives
□Vessel to collect the preservative oil
1. Clean the outside of the pump with solvents, if necessary using a steam-jet cleaning device.
2. Remove the blind flange on the pressure side.
3. Drain the pump, collecting the preservative oil in a vessel.
4. Remove the blind flange on the suction side.
5. To remove the residual preservative oil, rinse the pump with the pumped liquid.
WARNING
Risk of injury through emitted preservative oil.
► Wear protective clothing during all the work.
► Open the blind flange carefully in order to reduce any pressure that may exist in the pump.
► Collect the emitted preservative oil safely and dispose of it in an environmentally compatible man-
ner.

18 OIC 10en Edition 2019-11 Operating Instructions
Disposing of the pump
Transportation, storage and disposal
Disposing of the pump
Aids:
□Solvents or industrial cleaners suitable for the pumped liquid
□Vessel to collect pumped liquid
1. Disassemble the pump.
2. Clean residues of the pumped liquid from the individual parts.
3. Separate sealing elements made of elastomers and ceramics (SiC) from the pump and dispose of
them in the residual waste.
4. Recycle iron parts.
WARNING
Danger of poisoning and damage to the environment through pumped liquid or oil.
► Wear protective clothing during all the work.
► Collect the discharging pumped liquid or oil safely and dispose of in accordance with the locally
applicable regulations.
► Neutralize residues of the pumped liquid.

Operating Instructions OIC 10en Edition 2019-11 19
Safety instructions on installation, removal and connection
Installation, removal and connection
Installati on, removal and c onnection Safety instructions on installation, removal and connection
Installation
Installing the pump
Screw pumps can be operated in any mounting position. However, the manufacturer recommends that
the pump not be mounted above the motor since pumped liquid can ingress the motor if a leak occurs.
Prerequisite:
□The pump connections are to be protected against soiling, e.g. by using the protective cover moun-
ted in the factory
The following safety instructions must be observed:
□There is a risk of death for people with pacemakers.
► Under no circumstances may persons with pacemakers perform installation, removal or connec-
tion work.
Fig. 1 Mounting position (principle diagram) Fig. 2 Mounting position (principle diagram)
Fig. 3 Mounting position (principle diagram)
CAUTION
Leaking pumped liquid can damage the motor.
► Do not mount the pump above the motor.

20 OIC 10en Edition 2019-11 Operating Instructions
Installation
Installation, removal and connection
1. Bring the pump into position. Ensure that the flow direction that is marked by arrows on the flanges is
correct, see Fig. 2, page 24.
2. Fasten the pump with fastening elements securely on the mounting surface.
Protect the pump against soiling
► After the connecting work clean the pipe system thoroughly, see "Cleaning the pipe system",
page 22.
Connecting the pump to the pipe system
The pump connection to the pipe system must be stress-free, as otherwise there is no guarantee that
the pump will operate safely.
1. Turn the pump shaft or the fan impeller of the motor. This tests that the pump runs smoothly.
If the pump cannot be turned by hand, remedy the fault before installing the pump, see "Trou-
bleshooting", page 39.
2. Before beginning welding close the connecting flanges with protective covers.
3. Place the piping in position and support the weight of the piping.
4. Check the linear,height and angular offset and correct if necessary.
If the screws tighten easily, this is a sure sign that the installation is stress-free.
5. Tighten the connecting screws crosswise with torque, see Tab. 1, page 45.
Assembling the pump and motor
For further information, see "Replacing the magnetic coupling", page 29.
CAUTION
Damage to the pump and piping through insufficient fastening.
► Only fasten the pump on a stable bearing mounting surface.
► Ensure that the fastening elements are fixed sufficiently.
CAUTION
Damage to equipment through impurities in the pipe system.
► During welding work attach protective covers in front of the connecting flanges.
► Ensure when welding that welding beads and abrasive dust cannot get into the pipe system and
the pump.
CAUTION
Damage to equipment or impaired functionality through mechanical stresses.
► Ensure that the pump mounting on the pipe system is free of mechanical stress.