Multitech High-pressure pumps in ring-section design User Manual
Operating instructions
1777.8/7-10 G3
Multitec
High-pressure pumps in
ring-section design
Works No.: __________________________________
Type series: __________________________________
These operating instructions contain fundamental
information and precautionary notes. Please read
the manual thoroughly prior to installation of unit,
connection to the power supply and commissioning. It is
imperative to comply with all other operating instructions
referring to components of this unit.
This manual shall always be kept close to the unit’s
location of operation or directly on the pump set.
Contents
Page
1 General 4
2 Safety 4
2.1 Marking of instructions in the manual 4
2.2 Personnel qualification and training 4
2.3 Non-compliance with safety instructions 4
2.4 Safety awareness 4
2.5 Safety instructions for the operator / user 5
2.6 Safety instructions for maintenance,
inspection and installation work 5
2.7 Modification and manufacture of spare parts
by customer 5
2.8 Unauthorized modes of operation 5
3 Transport / Storage 5
3.1 Transport / Handling 5
3.2 Storage / Preservation 5
4 Description of the product and
accessories
4.1 Technical specification 6
4.2 Designation 6
4.3 Design details 6
4.4 Applications 6
5 Installation at site 7
5.1 Safety regulations / Special instructions 7
5.2 Foundation / Checks to be carried out prior to
installation 7
5.3 Installing the pump/unit 7
5.3.1 Aligning the pump / drive 8
5.4 Connecting the piping 9
5.4.1 Vacuum balance line 10
5.5 Connection to power supply 10
5.5.1 Connecting the motor 10
5.5.2 Setting the time relay 10
5.5.3 Checking the direction of rotation 10
6 Commissioning, start-up / shutdown 11
6.1 Commissioning 11
6.1.1 Lubricants 11
6.1.2 Priming the pump and checks to be carried
out
6.1.3 Contact guard 12
6.1.4 Connection to power supply 12
6.1.5 Start-up 12
6.1.6 Shutdown 12
6.1.7 Final check 12
6.2 Operating limits 12
6.2.1 Temperature of fluid pumped 12
6.2.2 Switching frequency 13
6.2.3 Minimum flows 13
6.2.4 Density of fluid pumped 13
6.3 Shutdown / storage / preservation 13
6.3.1 The unit / pump remains installed; periodic
check of operation 13
6.3.2 The pump is removed from the pipe and
stored
6.4 Returning to service after storage 13
7 Servicing / maintenance 14
7.1 General instructions 14
7.2 Servicing / inspection 14
7.2.1 Supervision of operation 14
7.2.2 Bearings and lubrication 14
7.2.3 Shaft seal 15
7.2.4 Coupling 15
7.3 Dismantling 15
7.3.1 General instructions 15
7.3.2 Preparations for dismantling 15
7.3.3 Dismantling the bearings 16
7.3.4 Dismantling and replacement of shaft seals 18
6
7.3.5 Dismantling the mechanical seal 18
7.3.6 Dismantling the hydraulic system 20
7.3.7 Recommended spare parts stock for 2 years’
continuous operation 20
7.4 Reassembly 20
7.4.1 Tightening torques - Tie bolts (part No. 905) 21
7.4.2 Reassembly of hydraulic system 21
7.4.3 Shaft seals 21
7.4.4 Bearings 22
7.5 Re-adjusting the clearance gaps 25
7.5.1 Max. clearance gaps 25
7.5.2 Repairs 25
8 Trouble-shooting 26
9 General assembly drawings 27-29
9.1 List of components 30
Tightening of shaft nuts on Multitec pumps 23
Adjusting dimensions for coupling alignment,
pump sizes 32 to 65, versions E, Ex, F, Fx, V, Vx 31
11
Multitec
Page
13
2
Index
Section Page
Adjusting dimensions for coupling
alignment, pump sizes 32 to 65, versions
E, Ex, F, Fx, V, Vx 31
Aligning the pump / drive 5.3.1 8
Applications 4.4 6
Bearings 7.4.4 22
Bearings and lubrication 7.2.2 14
Checking the direction of rotation 5.5.3 10
Commissioning 6.1 11
Commissioning, start-up / shutdown 6 11
Connecting the motor 5.5.1 10
Connecting the piping 5.4 9
Connection to power supply 5.5/6.1.4 10/12
Contact guard 6.1.3 12
Coupling 7.2.4 15
Density of fluid pumped 6.2.4 13
Description of the product and
accessories
Design details 4.3 6
Designation 4.2 6
Dismantling 7.3 15
Dismantling and replacement of shaft
seals
Dismantling the bearings 7.3.3 16
Dismantling the hydraulic systems 7.3.6 20
Dismantling the mechanical seal 7.3.5 18
Final check 6.1.7 12
Foundation / Checks to be carried out
prior to installation
General 1 4
General assembly drawings 9 27-29
General instructions 7.1 14
General instructions (dismantling) 7.3.1 15
Installation at site 5 7
Installing the pump/unit 5.3 7
List of components 9.1 30
Lubricants 6.1.1 11
Marking of instructions in the manual 2.1 4
Max. clearance gaps 7.5.1 25
Minimum flows 6.2.3 13
Modification and manufacture of spare
parts by customer
Non-compliance with safety instructions 2.3 4
Operating limits 6.2 12
Personnel qualification and training 2.2 4
Preparations for dismantling 7.3.2 15
Priming the pump and checks to be
carried out
Re-adjusting the clearance gaps 7.5 25
Reassembly 7.4 20
46
7.3.4 18
5.2
2.7
6.1.2 11
Section Page
Reassembly of hydraulic system 7.4.2 21
Recommended spare parts stock for 2
years’ continuous operation
Repairs 7.5.2 25
Returning to service after storage 6.4 13
Safety 2 4
Safety awareness 2.4 4
Safety instructions for maintenance,
inspection and installation work
Safety instructions for the operator / user 2.5 5
Safety regulations / Special instructions 5.1 7
Servicing / inspection 7.2 14
Servicing / maintenance 7 14
Setting the time relay 5.5.2 10
Shaft seal 7.2.3/7.4.3 15/21
Shutdown 6.1.6 12
Shutdown / storage / preservation 6.3 13
Start-up 6.1.5 12
Storage / Preservation 3.2 5
Supervision of operation 7.2.1 14
Switching frequency 6.2.2 13
Technical specification 4.1 6
Temperature of fluid pumped 6.2.1 12
The pump is removed from the pipe and
stored
The unit / pump remains installed; periodic
check of operation
Tightening of shaft nuts on Multitec pumps 23
Tightening torques - Tie bolts (part No.
7
905)
Transport / Handling 3.1 5
Transport / Storage 3 5
Trouble-shooting 8 26
Unauthorized modes of operation 2.8 5
Vacuum balance line 5.4.1 10
5
7.3.7
2.6
6.3.2 13
6.3.1
7.4.1 21
Multitec
20
5
13
3
Multitec
1 General
The Multitec pump has been developed in accordance with
state-of-the-art technology;it is manufactured with utmost care
and subject to continuous quality control.
These operating instructionsare intendedto facilitate operation
of the pump and help in commissioning and maintenance.
The manual also contains important recommendations for
reliable, proper and efficient operation.
These operating instructions do not take into account local
regulations;the operatormust ensure thatsuch regulations are
strictly observed by all, including the personnel called in for
installation.
Multitec pumps must not be operated beyond the limit values
specified in the technical documentation for the fluid handled,
capacity, speed, density, pressure, temperature and motor
rating. Make sure that operation is in accordance with the
instructions laid down in this manual or in the contract
documentation.
The name plate indicates the type series / size and the main
operating data; please quote this information in all
correspondence and particularly when ordering spare parts.
If you need any additional informationor instructions exceeding
the scope of this manual or in case of damage please contact
KSB’s after-sales service.
2 Safety
These operating instructions contain fundamental information
which must be complied with during installation, operation and
maintenance. Therefore this operating manual must be read
and understood both by the installing personnel and the
responsible trained personnel / operators prior to installation
and commissioning, and it must always be kept close to the
location of operation of the machine / unit for easy access.
Not only must the general safety instructions laid down in this
chapter on ”Safety” be complied with, but also the safety
instructions outlined under specific headings, plus:
- the general safety rules forworking materials and protective
devices,
- the applicable organizational guidelines for the
commissioning of working materials and tools
(work guidelines R233-1 to R233 - 10 and decree No. 93-41
dd. 11/1/93, or country-specific guidelines).
is used to introduce s afety instructions whose non-observance
may lead to damage to the equipment and its functions.
Instructions attached directly to the machine, e.g.
- arrow indicating the direction of rotation
- markings for auxiliary connections
must always be complied with and be kept in a perfectly legible
condition at all times. Non-compliance with these safety
instructions will lead to forfeiture of manufacturer’s warranties.
2.2 Personnel qualification and training
All personnel involved in the operation, maintenance,
inspection and installation of the unit must be fully qualified to
carry out the work involved.
Personnel responsibilities, competence and supervision must
be clearlydefined bythe operator. Ifthe personnel in question is
not already in possession of the requisite know-how,
appropriate training and instruction must be provided. If
required, the operator may commission the manufacturer /
supplierto take care of such training.In addition,the operatoris
responsible for ensuring that the c ontents of the operating
instructions are fully understood by the responsible personnel.
2.3 Non-compliance with safety instructions
Non-compliance with safety instructions can jeopardize the
safety of personnel, the environment and the machine / unit
itself. Non-compliance with these safety instructions will also
lead to forfeiture of any and all rights to claims for damages.
In particular, non-compliance can, for example, result in:
- failure of important machine/system functions,
- failure of prescribed maintenanceand servicingpractices,
- hazard to persons by electrical, mechanical, thermal and
chemical effects,
- hazard to the environment due to leakage of hazardous
substances.
2.4 Safety awareness
It is imperative to comply with the safety instructionscontained
in this manual, the relevant national health and safety
regulationsand the operator’s own internalwork, operation and
safety regulations.
2.1 Marking of instructions in the manual
The safety instructions contained in this manual whose
non-observance mightcause hazards to persons are specially
marked with the general hazard sign, namely:
(safety sign as per ISO 7000 - 0434)
The electrical danger warning sign is
(safety sign as per IEC 417 - 5036).
The word
Caution
4
2.5 Safety instructions for the operator / user
- Any hot or cold components that could pose a hazard must
be equipped with a guard by the operator.
- Guards which are fitted to prevent accidental contact with
moving parts (e.g.coupling) must not be removed whilst the
unit is operating.
- Leakages (e.g.at theshaft s eal) ofhazardous fluidshandled
(e.g. explosive, toxic, hot) mustbe contained so as to avoid
any danger to persons or the environment. Allrelevant laws
must be heeded.
- Electrical hazards must be eliminated. (In this respect refer
to the relevant safety regulations applicable to different
countries and/or the local energy supply companies.)
2.6 Safety instructions for maintenance, inspection and
installation work
The operator is responsible for ensuring that all maintenance,
inspection and installation work be performed by authorized,
qualified specialist personnel who are thoroughly familiar with
the manual.
Work on the machine / unit must be carried out only during
standstill. The shutdown procedure described in the manual for
taking the unit out of service must be adhered to without fail
(section 6.3).
Pumps or pump units handlingfluids injurious to health must be
decontaminated.
Immediately following completion of the work, all
safety-relevantand protective devicesmust be re-installed and
/ or re-activated.
Please observe all instructions set out in the chapter on
”Commissioning” (6.1) before returning the unit to service.
2.7 Modification and manufacture of spare parts by
customer
Modifications or alterations of the equipment supplied are only
permitted with KSB’s prior approval. Original spare parts and
accessories authorized by KSB ensuresafety.The use of other
parts will invalidate any liability of the manufacturer for
consequential damage.
2.8 Unauthorized modes of operation
The warranty relatingto theoperatingreliability andsafety of the
pump is only valid if the machine is used in accordance with its
designateduse, i.e.withthe technicaldataspecified. For further
details please refer to the information in section 4 of this
operating manual. The limits stated in the data sheet must not
be exceeded under any circumstances.
3 Transport, storage
3.1 Transport / Handling
Transportof the unit requires proper preparation and handling.
Never use the motor eyebolt for lifting the unit.
If the pump / unit slips out of the suspension
arrangement, it may cause personal injury and damage
to property!
Do notuse liftinggear whichmay damage the pump(e.g.
no chains).
Fig. 1 Transport of pump only
Multitec
Fig. 2 Transport of pump unit
For transporting the unit, lifting ropes shall be attached to the
pump and the motor as shown above. Never use the motor
eyebolt for lifting the unit!
Fig. 3 Transport of close-coupled pumps and vertical pumps
3.2 Storage / Preservation
Unless otherwise stated in the purchase order and order
confirmation, the pumps are supplied by our factory duly
preserved for a storage period of 3 months from delivery. We
recommend to take the following additional measures if the
pump is stored for a prolonged period of time prior to
commissioning:
Indoor storage of new pumps:
New pumps are preserved for indoor storage in a dry, closed
room in their original, unopened packaging for a maximum
period of 3 months.
Caution
the assembled unit components are closed and must only be
opened when required during installation.
Outdoor storage with the packaging unopened:
Protect the pump/unit against moisture, dirt, vermin and
unauthorized access.
It is imperative to remove the preservative prior to normal
commissioning by flushing through the system.
If the pump is to be stored for more than 3 months
(optional, specified in the purchase order):
New pump/unit:
New pumps/units arespecially preservedin themanufacturer’s
factory.
It is imperative to remove the preservative prior to normal
commissioning by flushing through the system.
Caution
completelyby dismantling and subsequent cleaning of all parts
of the pump coming into contact with the fluid handled, if
required. For further information please refer to the order
confirmation.
The unit/pump is installed some time before the system is
commissioned:
Special measures have to be taken for prolonged shutdown
periods, to make s ure that the pump is always ready for instant
start-up and to prevent the formation of deposits within the
pump’s hydraulic system and intake area (see section 6.3.1).
Protect all stored goods against moisture, dirt,
vermin and unauthorized access! All openings of
The product used for this purpose is not suitable
for potable water systems and must be removed
5
Multitec
4 Description of the product and
accessories
4.1 Technical specification
Multistage centrifugal pumpsin ring-section design withsuction
impeller for low NPSH value (exception: MTC 32).
Horizontal design, baseplate
mounted
1 casing entry, drive end
A
1 rolling element bearing, drive end
1 plain bearing, suction end
axial suction nozzle
for the entire H/Q range
same as installation type A, but
radial suction nozzle
B
Horizontal design, baseplate
mounted,
2 casing entries, drive and suction
C
end
2 rolling element bearings
drive on discharge side
for the entire H/Q range
same as installation type C, but
drive on suction side
D
Horizontal close-coupled pump,
common bearing for pump and mo-
E
Ex
F Fx
V
Vx
tor,
rigid coupling,
radial suction nozzle
H/Q range: up to 100 m
same as installation type E, but
axial suction nozzle
Vertical close-coupled pump
H/Q range: up to 204 m
up to 100 m
3
/h, 25 bar
3
/h 25 bar
3
/h 40 bar
4.2 Designation
Multitec A 32 / 8E - 2.1 12 . 65 (SP)
Type series
Installation type / pump version
Discharge nozzle DN
No. of stages / impeller combination
Hydraulic system
Material variant
Shaft seal code
Code for special variants (optional)
4.3 Design details
Pump type
High-pressure centrifugal pump in long-coupled (baseplate
mounted) or close-coupled design, horizontal or vertical
version, axial or radial suction nozzle. Radial suction and
discharge nozzles can be turned by 90°.
Bearings:
Radial bearings are s ilicon carbide plain bearings (not on
versions C and D), self-aligning. Plain bearings lubricated by
fluid handled. Fixed bearings are rolling element bearings,
grease- or oil-lubricated.
Shaft seals:
Uncooled gland packing; with or without barrier fluid.
Standardizedmechanical seal (uncooled,cooled)to EN12756.
Double-acting mechanical seal with standardized mechanical
seals to EN 12756 (back-to-back or tandem).
Cartridge seals, special designs.
Drive:
Electric/ hydraulicdrives, Dieselengines or turbinesup tomax.
4000 1/min.
4.4 Applications
Municipal water supply: pumping stations, water treatment
and pressure boosting systems.
Water treatment: filtration, reverse osmosis.
Pumps in industrial applications: general water supply, cold
water, washing systems, recycling, cooling circuits, boiler feed
systems, hot water, superheated water, condensate handling,
process, organic and inorganic liquids, degreasing agents,
washing or alkaline solutions, lubricants, cooling, surface
treatment.
Air-conditioning: large-scale air-conditioning systems,
high-rise buildings
Irrigation: centre-pivot sprinkling systems, trickle irrigation
systems, square sprinkling systems, flood irrigation systems.
6
Multitec
5 Installation at site
5.1 Safety regulations / Special instructions
Electrical equipment operated in potentially
explosive atmospheres must comply with the
relevant explosion protection regulations. This is
indicated on the motor rating plate. If the equipment is
installed in potentially explosive atmospheres, the
applicable local explosion protection regulations and the
regulations of the test certificate supplied with the
equipment and issued by the responsible approval
authorities must be observed and complied with. The test
certificate supplied must be kept close to the location of
operation for easy access (e.g. foreman’s office).
Centrifugal pumps will only give trouble-free
operationif carefully installed and properly serviced.
Note: The pump’s name plate shows the type series, pump
size, version, main operating data and the works number (see
also section 4.2).
Please quote the type series / version in all queries, repeat
orders and particularly when ordering spare parts .
5.3 Installing the pump/unit
Before placing the baseplate onthe foundation, make surethat
the concrete foundation is clean and smooth. The complete
pump unit must be aligned horizontally with the help of a
precision spirit level.
It is imperative that the factory-aligned unit mounted on the
baseplate be re-aligned after it has been fastened on the
foundation and after the piping has been connected(precision
alignment).
After placing the pump unit on the foundation, align it with the
help of a spirit level placed on the shaft/discharge nozzle. The
correct distance between the coupling halves as specified in
the general arrangement drawing must be observed. Shims
shall be fitted between the baseplate/foundation frame and the
foundation itself; they shall always be inserted to the left and
rightof thefoundationbolts andin closeproximityto thesebolts.
For a bolt-to-boltclearance > 800mm, additional shims shall be
used. All shims must lie perfectly flush.
Shim
Shim
³ 800
Shim
Fig. 4 Name plate
This unit must not be operated beyond the limit
values for capacity, speed and temperature
specified on the name plate. Make sure that operation is in
accordance with the instructions laid down in this manual
or in the contract documentation. All values stipulated for
electrical connection of the unit as well as instructions
given for installation and maintenance must be adhered to
without fail. Operation of the unit outside the
above-mentioned conditions may result in overloads the
unit cannot withstand.
Skilled, properly trained personnel is essential to ensure
trouble-free operation of the unit.
KSB shall not accept any liability if the instructions set
forth in this manual are not complied with.
In case of damage or if you need further information please
contact our nearest customer service centre.
5.2 Foundation / Checks to be carried out prior to
installation
All structural work required must have been prepared in
accordance with thedimensions stated in thedimension table /
general arrangement drawing.
The concrete foundations shall have sufficient strength (min.
class X0) to ensure safe and functional installation in
accordance with DIN 1045 or equivalent standards.
Make sure that the concrete foundation has set firmly before
placing the unit on it. Its surface shall be truly horizontal and
even.
Foundation bolts
Fig. 5 Fitting required shims
Tighten the foundation bolts evenly and firmly after after the
concrete has set.
Caution
Proceed with utmost care when aligning the unit, as the pump
unit will only give trouble-free operationwhen correctly aligned.
Non-compliance with these instructions will lead to forfeiture of
all warranty claims.
Channel section baseplates (up to 400 mm wide) are
torsion-resistant in their own right; they need not be grouted.
After fastening, baseplates more than 400 mm wide shall be
grouted up to the upper frame edge using low shrinkage
concrete, making sure that no cavities remain.
Close-coupled pumps
It is essentialto make sure that the pump is not warped in axial
or radial direction.
Ifpump and motorare suppliedseparately, place thepump onto
the foundation without the motor, align with the help of a
precision spirit level (on the upper flange of the drive lantern),
then fasten.
To align the pump, shims shall be fitted between the pump foot
and thefoundationitself;they shall alwaysbe insertedto theleft
and right of the foundation bolts and in close proximity to these
bolts. All shims must lie perfectly flush. Tighten the foundation
bolts evenly and firmly.
It is essential to make sure that the baseplate is
not warped in axial or radial direction.
Shim
Fig. 6 Fitting required shims
7
Multitec
5.3.1 Aligning the pump / drive
Coupling guard
Caution
without a coupling guard / a guard on the drive lantern. If the
customer specifically requests not to include a coupling guard /
lanternguard inour delivery,then theoperator mustsupply one.
Baseplate-mounted units
set be re-aligned (at the motor), if required.
Prior to checking the alignment/realignment, loosen the pump
feet and re-tighten without transmitting any stresses or strains.
Caution
completely assembled and aligned on a common baseplate.
Fig. 7 Aligning the coupling with the help of a gauge and a
straight-edge
Straight-edge
a
a
In compliance with health and safety
regulations the pump must not be operated
After fastening the baseplate on the foundation, the
coupling must be thoroughly checked and the pump
Coupling check and realignment must be
effected even if pump and motor are supplied
Straight-edge
a
a
Straight-edge Gauge
b
b
b
b
Caution
be tightened to the following torques:
MTC Thread Strength
32
50 M12 4.6 30 Nm 15 Nm
65 M16 4.6 60 Nm 30 Nm
100 M20 4.6 120 Nm 60 Nm
125 M20 4.6 120 Nm 60 Nm
150 M30 4.6 450 Nm 200 Nm
This will avoid that any increase in pump length due to
thermal expansion will lead to warping and deformation.
The increase in height of pump and drive due to thermal
expansion may differ; this has to be considered when
aligning the coupling of pump units handling temperatures of
100°C and higher.
The following equation can serve as a guide to estimate by
how much the motor has to be elevated in relation to the
pump:
DH [mm] = 1/100000 * (DTp * Hp - DTm * Hm)
DTp = Temperature difference pump - ambient (°C)
Hp = Height of pump axis [mm]
DTp = Temperature difference motor - ambient (°C)
Hp = Height of motor axis [mm]
Caution
reached operating temperature.
Close-coupled pumps and vertical pumps
Alignment between the motor and the pump is ensured by the
centering effect between the motor flange and the drive lantern
flange. It must be easy to rotate the shaft.
Caution
Final check
Re-check the alignment as described in the sections above. It
must be easy to rotatethe couplingby hand. Check the integrity
and proper functioning of all connections.
For fluid temperatures of 120°C and higher, the
footbolts holdingthe pumpon thebaseplatemust
Tightening torque
Drive
end
M12 4.6 30 Nm 15 Nm
In any case, also when using this correction, the
coupling has to be re-aligned when the unit has
For MTC V 32-65 please observe the adjusting
dimensionsfor couplingalignment(see page31).
Non-drive
end
Straight-edge
Fig. 8 Aligning a spacer-type coupling
The radial and axial deviation between thetwo coupling halves
must not exceed 0.1 mm.
8
Gauge
Multitec
5.4 Connecting the piping
Suction lift lines shall be laid with a rising slope towards the
pump and suction head lines with a downward slope towards
the pump, to prevent the formation of air pockets.
With short pipelines, the nominal diameters should be at least
equal to the nominal diameters of the pump nozzles. For long
pipelines, the most economical nominal diameter has to be
determined from case to case.
Adapters to larger diameters should have a diffuser angle of
approx. 8° in order to avoid any pressure losses caused by the
formation of air pockets or gas.
It is recommended to install check and shut-off elements in the
system, depending on the type of plant and pump.
Caution
Never use the pump itself as an anchorage point
for the piping. The piping-induced forces and
moments acting on the pump flanges (e.g. due to warped
pipelines or thermal expansion) must not exceed the
permissible forces and moments.
The pipelines shall be anchored in close proximity to the pump
and connected without transmitting any stresses or strains.
Their weight must not be carried by the pump.
Caution
If welding work must be performed on the piping
when the pump is already installed, the electric
welding equipment must not be earthed on the pump or
baseplate,to prevent current flowing through the rolling element
bearings,which could cause theirpremature destruction (pitting
effect).
Thermal expansions of the pipelines must be
compensated by appropriate measures so as not to
impose any extra loads on the pump.
Expansion joints may have to be used. An excessive,
impermissible increase in the pipeline forces may cause leaks
on the pump where the fluid handled can escape into the
atmosphere.
Danger to life when hot fluids are handled!
Max. permissible pipeline forces
(material codes 10, 11, 12, 13)
Nom. nozzle diameter (DN)
32 50 65 80 100 125 150 200 250
Vertical nozzle, at a right angle to the shaft (N )
Fx 245 510 640 700 1015 1470 1780 2700 Fy 410 635 800 970 1270 1850 2220 3490 -
Fz 265 415 520 625 830 1220 1465 2220 -
Horizontal nozzle, at a right angle to the shaft (N )
Fx 245 510 640 800 1015 1470 1780 2700 Fy 265 415 520 625 830 1220 1465 2220 Fz 410 635 800 970 1270 1850 2220 3490 -
Axial nozzle, parallel to the shaft (N )
Fx - - 800 - 1270 1850 2220 3490 4760
Fy - - 520 - 830 1220 1465 2220 3180
Fz - - 640 - 1015 1470 1780 2700 3810
Moments for all nozzles (Nm )
Mx 260 330 460 680 950 1235 1640 2520 3580
My 160 250 350 520 715 930 1260 1840 2710
Mz 190 170 240 340 490 660 840 1260 1740
Example:
Multitec 50 with radial suction nozzle
- for thesuction nozzle, thevalues givenin tablecolumnDN80
apply
- for the discharge nozzle, the values given in table column
DN50 apply
Max. permissible pipeline forces
(material codes 20 to 30)
The values given for material codes 10, 11, 12,13 shall be
multiplied by the factor 1.4.
Protection against foreign matter
Before commissioning new installations thoroughly clean,flush
and blow through all vessels, pipelines and connections. Often
welding beads, scale and other impurities only come off after a
certain period of operation. Fit a strainer in the suction line to
preventthem from entering thepump. The total cross-section of
the holesin the strainershall bethree timesthe cross-sectionof
the pipeline in order to avoid excessive pressure loss across
the strainer due to clogging. Conical strainers with laid in wire
mesh having a mesh width of 0.5 mm and a wire diameter of
0.25 mm, of corrosion-resistant material, shall be used.
Fig. 9 Max. nozzle forces and moments
Direction of forces:
X = horizontal, parallel to the pump axis
Y = vertical to the pump axis
X = horizontal, at a right angle to the pump axis
Direction of moments:
X = around the horizontal axis, parallel to the pump axis
MY = around the vertical nozzle axis
X = around the horizontal axis, at a right angle to the
pump axis
Suction and discharge nozzle are regarded separately.
1 Strainer housing
2 Fine screen
3 Perforated plate
4 Pump suction nozzle
5 Differential pressure gauge
Fig. 10 Conical strainer for the suction line
9
Multitec
5.4.1 Vacuum balance line
Where liquid has to be pumped out ofa vessel undervacuum, it
is advisable toinstalla vacuum balance line. Thislineshall have
a minimum nom. diameter of25 mm andmust extend abovethe
highest permissible liquid level of the vessel.
An additional pipeline fitted with a shut-off valve – from the
pump discharge nozzle to the balance line – facilitates venting
of the pump before start-up.
A Main shut-off valve
1212:5
B Vacuum balance line
C Shut-off valve
E Vacuum-tight shut-off valve
R Swing check valve
V Vessel under vacuum
Z Intermediate flange
Fig. 11 Suction line and vacuum balance line
5.5 Connection to power supply
Connection to the power supply must be effected by a
trained electrician only (see 5.1)!
The applicable DIN VDE regulations or country-specific
guidelines must be complied with.
Y configuration (high voltage)
1145:32/2
Fig. 13 Connection diagram for three-phase motors,
Y configuration
5.5.2 Setting the time relay
Make surethatin thecase of three-phase motors with star-delta
starting method switching over from starto delta will beeffected
at very short intervals. Prolonged switchover intervals may
result in pump damage.
Recommended time relay setting for star-delta starting: 3 to 5
seconds, depending on motor rating.
EN 50014 (DIN VDE 0170/0171 Part 1) stipulates that
explosion-proof motors, type of protection IP 54, increased
safety (Ex)e, thermalclass T3, mustalways be connected via a
motor protection switch.
5.5.3 Checking the direction of rotation
Caution
On pumps fitted with uni-directional mechanical
seals (seal codes 62 and 63) the direction of
rotation must never be checked with the pump coupled to the
motor. Ifthe pump/motorcoupling doesnot haveto beremoved,
make sure that the pump has been primed before checking the
direction of rotation.
The motor’s direction of rotation must correspond to the
direction indicated by the arrow on the pump or motor
(clockwise when seen from the motor end; on version D
anti-clockwise). Verify by switching the motor on and then off
again immediately.
If the pump runs in the wrong direction of rotation, interchange
any two phases L1, L2 or L3 of the power cable in the motor
terminal box.
Check available mains voltage against the data on the motor
rating plate and select appropriate start-up method.
All connections shall be effected in accordance with the
technical specifications issued by the local energy supply
company.
We strongly recommend to use a motor protection switch.
5.5.1 Connecting the motor
Connect themotor in accordance withthe circuit diagram in the
terminal box or as illustrated in fig. 12 or fig. 13.
Caution
Priorto starting the motor,check whetherthe wires
are firmly connected at the terminals and
re-tighten any loose wires.
n configuration (low voltage)
1145:31/2
Fig. 12 Connection diagram for three-phase motors,
n configuration
10
Loading...