Alfalaval LKH-112 User manual

3003-0004
100002859-EN8 2022-01
Original manual
Instruction Manual
LKH Multi-Stage Pump

Table of contents
The information herein is correct at the time of issue but may be subject to change without prior notice
1. EC Declaration of Conformity ....................................................................... 4
2. Safety .................................................................................................... 5
2.1. Important information ............................................................................. 5
2.2. Warning signs ..................................................................................... 6
2.3. Safety precautions ................................................................................ 7
3. Installation .............................................................................................. 9
3.1. Unpacking/delivery ............................................................................... 9
3.2. Installation/Pre-use Check ....................................................................... 11
3.3. Recycling information ............................................................................. 16
4. Operation ............................................................................................... 17
4.1. Operation/Control ................................................................................. 17
4.2. Trouble shooting .................................................................................. 20
4.3. Recommended cleaning ......................................................................... 21
5. Maintenance ........................................................................................... 23
5.1. General maintenance ............................................................................. 23
5.2. Cleaning Procedure ............................................................................... 26
5.3. Dismantling of pump/shaft seals ................................................................ 27
5.4. Assembly of Pump/Assembly of Shaft Seal - LKH-110 ....................................... 31
5.5. Assembly of Pump/Assembly of Shaft Seal - LKH-120/P .................................... 36
6. Technical data ......................................................................................... 41
6.1. Technical data ..................................................................................... 41
6.2. Relubrication intervals ............................................................................ 43
6.3. Torque Specifications ............................................................................. 43
6.4. Weight (kg) ........................................................................................ 44
6.5. Noise emission .................................................................................... 45
7. Parts list and service kits ............................................................................ 46
7.2. LKH Multi-Stage - Wet end ...................................................................... 47
7.3. LKH Multi-Stage - Motor dependent parts ..................................................... 49
7.4. LKH Multi-Stage - Shaft seal and Service kits ................................................. 51
3

1 EC Declaration of Conformity
Revision of Declaration of Conformity 2009-12-29
The Designated Company
Alfa Laval Kolding A/S
Company Name
Albuen 31, DK-6000 Kolding, Denmark
Address
[phone]
Phone No.
hereby declare that
Pump
Designation
LKH-112, LKH-112/P, LKH-113, LKH-113/P, LKH-114, LKH-114/P, LKH-122/P, LKH-123/P, LKH-124/P
Type
From serial number 10.000 to 1.000.000
is in conformity with the following directive with amendments:
- Machinery Directive 2006/42/EC
The person authorised to compile the technical file is the signer of this document
Global Product Quality Manager
Pump, Valves, Fittings and Tank Equipment Lars Kruse Andersen
Title Name
Kolding 2013-12-03
Place Date Signature
4

2 Safety
Unsafe practices and other important information are emphasized in this manual.
Warnings are emphasized by means of special signs.
Always read the manual before using the pump!
2.1 Important information
WARNING
Indicates that special procedures must be followed to avoid serious personal injury.
CAUTION
Indicates that special procedures must be followed to avoid damage to the pump.
NOTE
Indicates important information to simplify or clarify procedures.
This Instruction manual is designed to provide the user with the information to perform tasks safely for all phases in the
life time of the product supplied.
The User shall always read the safety section first. Hereafter the User can skip to the relevant section for the task to be
carried out or for the information needed.
This is the complete manual for the supplied product.
Skills for personal:
Operators:
The operators shall read and understad the instruction manual for the supplied product
Maintenance personnel:
The maintenance personnel shall read and understad the instruction manual.
The maintenance personnel or technicians shall be skilled within the field required to carry out the maintenance work
safely.
Trainees:
Trainees can perform tasks under the supervision of an experienced employee.
People in general:
The public shall not have access to the supplied product.
How to contact Alfa Laval
Contact details for all countries are
continually updated on our website.
Please visit www.alfalaval.com to access the information directly.
5

2Safety
Unsafe practices and other important information are emphasized in this manual.
Warnings are emphasized by means of special signs.
Always read the manual before using the pump!
2.2 Warning signs
General warning:
!
Dangerous electrical voltage:
Caustic agents:
6

2 Safety
All warnings in the manual are summarized on this page.
Pay special attention to the instructions below so that severe personal injury and/or damage to the pump are avoided.
2.3 Safety precautions
General
Always ensure that personnel must have experience with lifting operations.
Always ensure the lifting point to be in line with center of gravity. Adjust lifting point if necessary.
Always keep an eye on the load and stay clear during the lifting operation.
Always ensure that the lifting equipment issuitableforthespecificpump.
Always use appropriate lifting equipment for heavy parts when relevant. Use lifting logs when applied.
To prevent unexpected start and contact with electrical live and moving parts.
Always disconnect the power supply safely:
- The power supply disconnecting device must be disconnected (in off position) and locked.
- In case the pump is capable of being plugged into an electrical supply, removal of the plug is sufficient, provided
that the operator can check from any of the points to which he has access that the plug remains removed.
Always refer to the motor instruction manual for installation and maintenance of the motor.
Never touch the impeller through the inlet/outlet during start/stop as this can cause serious injury.
Installation:
Always read the technical data thoroughly. (See chapter 6 Technical data)
Pump without impeller screw:
!
Always remove the impeller before checking the direction of rotation.
Never start the pump if the impeller is fitted and the pump casing is removed.
Pump with Impeller screw:
Never start in the wrong direction of rotation with liquid in the pump.
Always have the pump electrically connected by authorised personnel. (See the motor instruction)
Operation:
Always read the technical data thoroughly. (See chapter 6 Technical data)
Never touch the pump or the pipelines when pumping hot liquids or when sterilising.
Never run the pump with both the suction side and the pressure side blocked.
Never run the pump when partially installed or not completely assembled.
!
Necessary precautions must be taken if leakage occurs as this can lead to hazardous situations.
Always handle lye and acid with great care.
Never use the pump for products not mentioned in the Alfa Laval pump selection program.
The Alfa Laval pump selection program can be acquired from your local Alfa Laval sales company.
Maintenance:
Always read the technical data thoroughly. (See chapter 6 Technical data)
Never service the pump when it is hot.
Never service the pump if pressurised.
Always use Alfa Laval genuine spare parts.
!
Motors with grease nipples:
Always lubricate acording to motor manufactures recommended procedures.
Always locate and remove grease vent plugs, if provided, prior to adding grease.
Always check motor nameplate for grease type and lubrication intervals.
7

2Safety
All warnings in the manual are summarized on this page.
Pay special attention to the instructions below so that severe personal injury and/or damage to the pump are avoided.
Transportation:
Transportation of the pump or the pump unit:
Never lift or elevate in any way other than described in this manual
Always drain the pump head and accessories of any liquid
Always ensure that no leakage of lubricants can occur
Always transport the pump in its upright position
Always ensure that the unit is securely fixed during transportation
Always use the original packaging or similar during transportation
Always use suitable transport device ie. forklift or pallet lifter
Storage:
Ideally as a guide Alfa Laval would recommend:
- Store supplied product as supplied in original packaging
- Port opening should be protected against any ingress
- Bare steel (not stainless) should be lightly oiled/greased
- Store in a clean, dry place without direct sunlight or UV light
- Temperature range -5 to 40°C
- Relative humidity less than 60%
- No exposure to corrosive substances (also air contained)
8

3 Installation
The LKH-110 and -120P pump is highly efficient and econominal centrifugal pump, which meets the requirements of sanitary
and gently product treatment and chemical resistance. LKH-110 and the LKH-120P is avaliable in the following sizes, LKH-112,
-113, -114 and LKH122/P, -123/P, -124/P. The instruction manual is part of the delivery. Study the instructions carefully. The
large pump sizes are very heavy. ALfa Laval recommends the use of a lifting crane when handling the pump.
3.1 Unpacking/delivery
Step 1
!
Always use a lifting crane when handling the pump
CAUTION
Alfa Laval cannot be held responsible for incorrect unpacking.
WARNING:
Be aware that certain pump configurations can tilt, and thereby
cause injuries to feet or fingers. The pump should be supported
underneath the adaptor, when not installed in the process line.
Check the delivery for:
1. Complete pump.
2. Delivery note.
3. Instruction manual.
4. Motor instructions.
5. Test certificate, IF ORDERED!
Step 2
Remove possible packing materials from the inlet and the outlet.
Avoid damaging the inlet and the outlet.
Avoid damaging the connections for flushing liquid, if supplied.
* Remove packing materials!
3003-0085
!
*
*
*
Step 3
Inspect the pump for visible transport damages.
3003-0086
9

3 Installation
The LKH-110 and -120P pump is highly efficient and econominal centrifugal pump, which meets the requirements of sanitary
and gently product treatment and chemical resistance. LKH-110 and the LKH-120P is avaliable in the following sizes, LKH-112,
-113, -114 and LKH122/P, -123/P, -124/P. The instruction manual is part of the delivery. Study the instructions carefully. The
large pump sizes are very heavy. ALfa Laval recommends the use of a lifting crane when handling the pump.
Step 4
Alwaysremovetheshroud,iffitted,beforeliftingthepump.
3003-0087
10

3 Installation
Study the instructions carefully and pay special attention to the warnings!
The direction of rotation of the impeller can be checked by observing the direction of rotation of the motor fan.
- See the indication label on the pump.
3.2 Installation/Pre-use Check
Step 1
!
Always read the technical data thoroughly.
(See chaper 6 Technical data)
Never start in the wrong direction of rotation with liquid in the pump. See step 6 Pre-use check
!
Always use a lifting crane when handling the pump.
Always have the pump electrically connected by authorised personnel. (See the motor instructions).
CAUTION
Alfa Laval cannot be held responsible for incorrect installation.
CAUTION
The pump does not prevent back flow when intenrionally or unintentionally stopped. If back flow can cause any hazardous
situations, precautions must be taken e.g. check the valve to be installed in the system preventing hazardous situations
from arising.
CAUTION
If the pump has been stored for longer period of time there is a risk that the seal faces may stick together and consequently
cause damage to the seal at start-up. Please ensure that the pump shaft can be rotated by hand before start-up.
WARNING:
Alfa Laval recommends the supply disconnecting device shall be in accordance with EN60204-1. Always disconnect the
supply disconnecting device safely after installation before continuing the installation.
Step 2
Ensure at least 0.5 m (1.6 ft) clearance around the pump.
Ensure the floor/frame is able to support the weight of the pump.
See Technical data and other environment requirements in section
6.
Ensure the pump is supported by all four feet equally.
3003-0088
11

3 Installation
Study the instructions carefully and pay special attention to the warnings!
The direction of rotation of the impeller can be checked by observing the direction of rotation of the motor fan.
- See the indication label on the pump.
Step 3
Check that the flow direction is correct.
O: Outlet
I: Inlet
3003-0089
I
O
9
Step 4
1. Ensure that the pipelines are routed correctly.
2. Ensure that the connections are tight.
3. Remember seal rings. Few bends
3003-0090
12

3 Installation
Study the instructions carefully and pay special attention to the warnings!
The direction of rotation of the impeller can be checked by observing the direction of rotation of the motor fan.
- See the indication label on the pump.
Step 5
Avoid stressing the pump.
Piping system must be self-supported.
Pay special attention to:
-Vibrations.
- Thermal expansion of the tubes.
- Excessive welding.
- Overloading of the pipelines.
Example of piping system self-supported.
3003-0091
!
3003-0092
Step 6
Ensure correct alignment of pump inlet and outlet with piping
system.
Alignment can be done by adjusting the pump legs.
3003-0093
9
3003-0094
13

3 Installation
Study the instructions carefully and pay special attention to the warnings!
The direction of rotation of the impeller can be checked by observing the direction of rotation of the motor fan.
- See the indication label on the pump.
Centre of inlet and outlet to be aligned with centre of piping system.
3003-0095
No gaps between connections on pump inlet and inlet pipe, and pump outlet and outlet pipe.
3003-0096
Angel between connections on pump inlet and inlet pipe, pump outlet and outlet pipe not allowed.
3003-0097
14

3 Installation
Study the instructions carefully and pay special attention to the warnings!
The direction of rotation of the impeller can be checked by observing the direction of rotation of the motor fan.
- See the indication label on the pump.
Note
In case of shaft seal leakage, the media will drip from the slot in the bottom of the adaptor. In case of shaft seal leakage, Alfa
Laval recommends putting a drip tray underneath the slot to collect the leakage.
Step 7
!
Never start in the wrong direction of rotation with liquid in the pump
Always ensure the adaptor shield and motor fan guard are present
and mounted correctly and allow no access to rotating parts
before installing and starting the pump.
Pre-use check:
1. Connect power supply
2. Start and stop the motor momentarily.
3. Ensure that the direction of ratoation of the motor fan is
clockwise as viewed from the rear end of the motor.
4. Disconnect power supply safely.
* Correct rotation direction! See the indication label!
3003-0100
9
*
15

3 Installation
3.3 Recycling information
• Unpacking
- Packing material consists of wood, plastics, cardboard boxes and in some cases metal straps.
- Wood and cardboard boxes can be reused, recycled or used for energy recovery.
- Plastics should be recycled or burnt at a licensed waste incineration plant.
- Metal straps should be sent for material recycling.
• Maintenance
- During maintenance oil and wear parts in the machine are replaced.
- All metal parts should be sent for material recycling.
- Worn out or defective electronic parts should be sent to a licensed handler for material recycling.
-Oilandallnon
metal wear parts must be taken care of in agreement with local regulations.
• Scrapping
- At end of use, the equipment shall be recycled according to relevant, local regulations. Beside the equipment itself, any
hazardous residues from the process liquid must be considered and dealt with in a proper manner. When in doubt, or in the
absence of local regulations, please contact the local Alfa Laval sales company.
16

4Operation
Study the instructions carefully and pay special attention to the warnings!
4.1 Operation/Control
Step 1
!
Always read the technical data thoroughly. See chaper 6 Technical data
CAUTION
Alfa Laval cannot be held responsible for incorrect operation/control.
!
Never touch the pump or the pipelines when pumping hot liquids or when sterilising.
Step 2
!
Never touch the pump or the pipelines when pumping hot liquids
or when sterilising.
3003-0101
Step 3
!
Never run the pump with both the suction side and the pressure
side blocked.
*Danger of explosion! See warning label on pump.
!
3003-0102
17

4Operation
Study the instructions carefully and pay special attention to the warnings!
Step 4
CAUTION
The shaft seal must not run dry.
CAUTION
Never throttle the inlet side.
*Do not allow to run dry
9

3003-0103
*
Step 5
Flushed shaft seal:
1. Connect the inlet of the flushing liquid correctly.
2. Regulate the water supply correctly.
3. Observe the steam data.
O: Outlet
I: Inlet
Tmax =100°C
Pmax =1bar
(flush seal)
I
O
3003-0104
9
18

4Operation
Study the instructions carefully and pay special attention to the warnings!
Step 6
Control:
Reduce the capacity and the power consumption by means of:
- Throttling the pressure side of the pump.
- Reducing the impeller diameter.
- Reducing the speed of the motor.
* Throttling!
*
3003-0105
19

4Operation
Pay attention to possible faults.
Study the instructions carefully.
4.2 Trouble shooting
NOTE!
Study the maintenance instructions carefully before replacing worn parts. - See section 5.1 General maintenance
Problem Cause/result Remedy
Overloaded motor - Pumping of viscous liquids - Larger motor or smaller impeller
- Pumping of liquids with high density
- Low outlet pressure (counter pressure) - Higher counter pressure (throttling)
- Lamination of precipitates from the
liquid - Frequent cleaning
- Damage - Low inlet pressure - Increase the inlet pressure
- Pressure reduction (sometimes to
zero) - High liquid temperature - Reduce the liquid temperature
- Increasing of the noise level - Reduce the pressure drop before the
pump
Leaking shaft seal - Dry run Replace:
All wearing parts
- Incorrect rubber grade If necessary:
- Change rubber grade
- Abrasive particles in the liquid - Select stationary and rotating seal ring
in Silicon Carbide/Silicon Carbide
Leaking O-ring seals Incorrect rubber grade Change rubber grade
20