Alfa Laval LKH-5 Instruction Manual
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Alfa Laval LKH-5 Instruction Manual

Lkh centrifugal pump
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Instruction Manual
LKH Centrifugal Pump
ESE00698-EN21
Original manual
3000-0059
2017-05

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Summary of Contents for Alfa Laval LKH-5

  • Page 1 Instruction Manual LKH Centrifugal Pump 3000-0059 ESE00698-EN21 2017-05 Original manual...

  • Page 3: Table Of Contents

    5.4. Assembly of pump/single shaft seal ............5.5. Assembly of pump/flushed shaft seal ............5.6. Assembly of pump/double mechanical shaft seal ..........5.7. Adjustment of shaft (LKH-5) ..............5.8. Adjustment of shaft (LKH-10 to -90) ............6. Technical data ..................

  • Page 4: Ec Declaration Of Conformity

    Phone No. hereby declare that Pump Designation LKH-5, LKH-10, LKH-15, LKH-20, LKH-25, LKH-35, LKH-40, LKH-45, LKH-50, LKH-60, LKH-70, LKH-85, LKH-90 Type From serial number 10.000 to 1.000.000 is in conformity with the following directive with amendments: - Machinery Directive 2006/42/EC...

  • Page 5: Safety

    2 Safety Unsafe practices and other important information are emphasised in this manual. Warnings are emphasised 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.

  • Page 6: Safety Precautions

    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.

  • Page 7: Installation

    2. Delivery note. data). 3. Motor instructions. CAUTION Alfa Laval cannot be held responsible for incorrect unpacking. WARNING: Be aware that certain pump configurations can tilt, and therefore cause injuries to feet or fingers. The pump should be supported underneath the adaptor, when not installed in the process line.
  • Page 8 3 Installation Step 5 ONLY LKH-85 and LKH-90 Do NOT use eyebolt in casing to lift the pump. The eyebolt is for casing removal only.

  • Page 9: Installation

    Read the instructions carefully and pay special attention to the warnings! Always check the pump before operation. - See pre-use check in section 3.3 Pre-use check - pump without impeller screw. The large pump sizes are very heavy. Alfa Laval therefore recommends the use of a lifting crane when handling the pump. 3.2 Installation Step 1 Always read the technical data thoroughly.
  • Page 10 - See pre-use check in section 3.3 Pre-use check - pump without impeller screw. The large pump sizes are very heavy. Alfa Laval therefore recommends the use of a lifting crane when handling the pump. Step 4 Remember seal rings 1.

  • Page 11: Pre-Use Check - Pump Without Impeller Screw

    3 Installation Read the instructions carefully and pay special attention to the warnings! LKH-5 to -60 comes without impeller screw as standard but can be supplied with one. Check the direction of rotation of the impeller before operation. - See the indication label on the pump.

  • Page 12: Pre-Use Check - Pump With Impeller Screw

    3 Installation Read the instructions carefully and pay special attention to the warnings! LKH-5 to -60 comes without impeller screw as standard but can be supplied with one. Check the direction of rotation of the impeller before operation. - See the indication label on the pump.

  • Page 13: Recycling Information

    3 Installation Read the instructions carefully and pay special attention to the warnings! LKH-5 to -60 comes without impeller screw as standard but can be supplied with one. Check the direction of rotation of the impeller before operation. - See the indication label on the pump.

  • Page 14: Operation

    4.1 Operation/Control Step 1 Always read the technical data thoroughly. See chapter 6 Technical data CAUTION Alfa Laval cannot be held responsible for incorrect operation/control. Step 2 Danger of burns! Never touch the pump or the pipelines when pumping hot liquids or when sterilising.
  • Page 15 4 Operation Read the instructions carefully and pay special attention to the warnings! Step 4 CAUTION The shaft seal must not run dry. Do not allow to CAUTION run dry Never throttle the inlet side. Step 5 Double mechanical/flushed shaft seal: 1.

  • Page 16: Trouble Shooting

    4 Operation Pay attention to possible faults. Read the instructions carefully. 4.2 Trouble shooting NOTE! Read the maintenance instructions carefully before replacing worn parts. Remedy Problem Cause/result Motor overloaded - Pumping of viscous liquids - Larger motor or smaller impeller - Pumping of high density liquids - Low outlet pressure (counter pressure) - Higher counter pressure (throttling) - Lamination of precipitates from the...

  • Page 17: Recommended Cleaning

    4 Operation The pump is designed for cleaning in place (CIP). CIP = Cleaning In Place. Study the instructions carefully and pay special attention to the warnings! NaOH = Caustic Soda. = Nitric acid. 4.3 Recommended cleaning Step 1 Caustic danger! Always handle lye and acid with great care.

  • Page 18: Maintenance

    Order service kits from the service kits list (See chapter 7 Parts list and service kits). Ordering spare parts Contact your local Alfa Laval sales company. Note: If the pump is supplied with FEP O-rings, Alfa Laval recommends that the casing O-ring is replaced during pump maintenance.
  • Page 19 5 Maintenance Maintain the pump with care. Read the instructions carefully and pay special attention to the warnings! Always keep spare shaft seals and rubber seals in stock. See separate motor instructions. Check the pump for smooth operation after service. Shaft seal Rubber seals Motor bearings...

  • Page 20: Cleaning Procedure

    5 Maintenance 5.2 Cleaning Procedure Cleaning procedure for soiled impeller screw tapped hole: 1. Remove stub shaft (7) as per section 4 of the Service manual. 2. Submerge and soak the stub shaft for 5 minutes in COP tank with 2% caustic wash 3.

  • Page 21: Dismantling Of Pump/Shaft Seals

    : Relates to the shaft seal. 5.3 Dismantling of pump/shaft seals Step 1 A. LKH-5: Remove screws (56), spring washers (56a), clamps (55+55a) and pump casing (29). B. LKH-10 to 90: Unscrew cap nuts (24) and remove washers (24a) and pump casing (29).
  • Page 22 5 Maintenance Read the instructions carefully. The items refer to the parts list and service kits section. Handle scrap correctly. : Relates to the shaft seal. Step 3 Remove screw (23) and safety guard (22). Step 4 Counterhold with a screwdriver! 1.
  • Page 23 5 Maintenance Read the instructions carefully. The items refer to the parts list and service kits section. Handle scrap correctly. : Relates to the shaft seal. Step 8 Double mechanical shaft seal: 1. Remove screws (41) and seal housing (40a). 2.

  • Page 24: Assembly Of Pump/Single Shaft Seal

    5 Maintenance Read the instructions carefully. The items refer to the parts list and service kits section. Handle scrap correctly. : Relates to the shaft seal. 5.4 Assembly of pump/single shaft seal Step 1 1. Remove spring (13). NOTE! Make sure that O-ring (15) has maximum clearance from the sealing surface.
  • Page 25 5 Maintenance Read the instructions carefully. The items refer to the parts list and service kits section. Handle scrap correctly. : Relates to the shaft seal. Step 5 1. Clean the sealing surfaces with contact cleaner before fitting back plate (25). 2.
  • Page 26 : Relates to the shaft seal. Step 9 A. LKH-5: Fit pump casing (29), clamps (55+55a), spring washers (56a) and screws (56). B. LKH-10 to -90: Fit pump casing (29), washers (24a) and cap nuts (24). 2. Adjust pump casing to the right position.

  • Page 27: Assembly Of Pump/Flushed Shaft Seal

    Step 1 Use ø63 mm tube! Flushed shaft seal: LKH-5 to -60 use ø63mm tube LKH-70 to -90 press in lip seal by hand 1. Fit lip seal (43) in seal housing (40). 2. Lubricate O-ring (44) and slide onto the seal housing (40).
  • Page 28 5 Maintenance Read the instructions carefully. The items refer to the parts list and service kits section. Lubricate the rubber seals before fitting them. : Relates to the shaft seal. Step 5 Lubricate O-ring (26) and slide it onto back plate (25). Step 6 1.
  • Page 29 Lubricate the rubber seals before fitting them. : Relates to the shaft seal. Step 9 A. LKH-5: Fit pump casing (29), clamps (55+55a), spring washers (56a) and screws (56). B. LKH-10 to-90: Fit pump casing (29). 2. Tighten nuts (20) for back plate (25).

  • Page 30: Assembly Of Pump/Double Mechanical Shaft Seal

    5 Maintenance Read the instructions carefully. The items refer to the parts list and service kits section. Lubricate the rubber seals before fitting them. : Relates to the shaft seal. 5.6 Assembly of pump/double mechanical shaft seal Step 1 1. Fit O-rings (15) in rotating seal rings (14). 2.
  • Page 31 5 Maintenance Read the instructions carefully. The items refer to the parts list and service kits section. Lubricate the rubber seals before fitting them. : Relates to the shaft seal. Step 7 1. Lubricate O-ring (38) and fit it in impeller (37), if impeller screw is used.
  • Page 32 2. Tighten nuts (20) for back plate (25). A. LKH-5: Fit clamps (55+55a), spring washers (56a) and screws (56) and tighten. B. LKH-10 to -90: Fit washers (24a) and cap nuts (24) and tighten, according to torque values in chapter 6 Technical data.

  • Page 33: Adjustment Of Shaft (Lkh-5)

    Read the instructions carefully. The items refer to the parts list and service kits section. Lubricate the rubber seals before fitting them. : Relates to the shaft seal. 5.7 Adjustment of shaft (LKH-5) Step 1 1. Loosen screws (6). 2. Pull off stub shaft (7).
  • Page 34 1. Fit impeller (27) on stub shaft (7). LKH-5 = 0.5 mm 2. Ensure that the clearance between the impeller and back plate (0.02 inch) (25) is correct: 0.5 mm (0.02 inch) for LKH-5. Step 6 Tighten screws (4) evenly to 15 Nm (11 lbf-ft).

  • Page 35: Adjustment Of Shaft (Lkh-10 To -90)

    5 Maintenance Read the instructions carefully. The items refer to the parts list and service kits section. Lubricate the rubber seals before fitting them. : Relates to the shaft seal. 5.8 Adjustment of shaft (LKH-10 to -90) LKH-70 to -90 For securing the best fixture to the motor shaft ensure the following: - Conical surfaces on the pump shaft and compression rings are applied with grease.
  • Page 36 5 Maintenance Read the instructions carefully. The items refer to the parts list and service kits section. Lubricate the rubber seals before fitting them. : Relates to the shaft seal. Step 5 LKH-10 to -60 = 0.5 mm (0.02 inch) 1.

  • Page 37: Technical Data

    The LKH pump is a highly efficient and econominal centrifugal pump, which meets the requirements of sanitary and gentle product treatment and chemical resistsnce. LKH is available in the following sizes LKH-5, -10, -15, -20, -25, -35, -40, -50, -60, -70, -75, -85 and -90.

  • Page 38: Relubrication Intervals

    6 Technical data It is important to observe the technical data during installation, operation and maintenance. Inform personnel about the technical data. 6.2 Relubrication intervals The table is for an internal bearing temperature of 100°C. An increase in temperature of 15°C (ambient or internal in bearings), will reduce the greasing interval and bearing lifetime by 50%.
  • Page 39 6 Technical data It is important to observe the technical data during installation, operation and maintenance. Inform personnel about the technical data. WEG IEC Motors, IE3 Motor power LKH-5 -70 (kW) LKHI-10 -60* LKH-110* LKHSP, LKH Evap LKH UltraPure 50/60 HZ Permanently lubricated 0.75...
  • Page 40 6 Technical data It is important to observe the technical data during installation, operation and maintenance. Inform personnel about the technical data. Table 1. Sterling NEMA motors Motor RPM Frame Type of service Heavy duty VS. HP Standard 8 hrs/day 24 hrs/day 143T - 286TS 1.5 - 30...

  • Page 41: Torque Specifications

    6 Technical data It is important to observe the technical data during installation, operation and maintenance. Inform personnel about the technical data. 6.3 Torque Specifications The table below specifies the tightening torques for the screws, bolts and nuts in this pump. Always use the torques specified below if no other values are stated.

  • Page 42: Noise Emission

    6 Technical data It is important to observe the technical data during installation, operation and maintenance. Inform personnel about the technical data. 6.5 Noise emission Pump Type Sound pressure level (dBA) LKH-5 LKH-10 LKH-15 LKH-20 LKH-25 LKH-35 LKH-40 LKH-45 LKH-50...

  • Page 43: Parts List And Service Kits

    7 Parts list and service kits The drawing shows LKH pump, sanitary version. 7.1 LKH-5 Sanitary version US legs are different to the ones shown. For further information see US spare parts. Impeller screw Fitting of legs Fitting of back plate 0.75-1.1 kW...

  • Page 44: Lkh-10, -15, -20, -25, -35, -40, -50, -60, -70, -75, -85, -90 Sanitary Version

    7 Parts list and service kits The drawing shows the LKH pump, sanitary version. 7.2 LKH-10, -15, -20, -25, -35, -40, -50, -60, -70, -75, -85, -90 sanitary version LKH10 -75 LKH-85 and LKH-90 US legs are different to the ones shown. For further information see US spare parts. Only used for 0.75, 1.1 Fitting of back plate Only used for 55 - 110 kW...

  • Page 46: Lkh - Product Wetted Parts

    7 Parts list and service kits The drawing shows the LKH pump, sanitary version. 7.3 LKH - Product wetted parts * If inducer (57) is retrofitted. Pump inlet may have to be slightly ground.
  • Page 47 7 Parts list and service kits The drawing shows the LKH pump, sanitary version. Parts list Pos. Denomination Washer Cap nut Washer Back plate ♦∆▲ O-ring  Impeller Bolt Pump casing Impeller screw Impeller for impeller screw ♦∆ O-ring Upper clamp Lower clamp Screw Spring washer...

  • Page 48: Lkh - Motor-Dependent Parts

    7 Parts list and service kits The drawing shows the LKH pump, sanitary version. 7.4 LKH - Motor-dependent parts LKH-70/-85/-90 9614-0608_ROW 3000-0055...
  • Page 49 7 Parts list and service kits The drawing shows the LKH pump, sanitary version. Parts list Pos. Denomination Motor ABB Motor ABB Shroud Screw Screw Compression ring with thread Compression ring without thread Screw Washer Shaft incl. pin Connex pin Retaining ring Adaptor Screw for adaptor...

  • Page 50: Lkh - Shaft Seal

    7 Parts list and service kits The drawing shows the LKH pump, sanitary version. 7.5 LKH - Shaft seal...
  • Page 51  Service kit, C/SiC (LKH-5) ........9611922302...
  • Page 52  Service kit, SiC/SiC (LKH-5) ........9611922526...
  • Page 53 ∆ Service kit, C/SiC (LKH-5) ........9611922318...
  • Page 56 © 1999-02 Alfa Laval Corporate AB This document and its contents is owned by Alfa Laval Corporate AB and protected by laws governing intellectual property and thereto related rights. It is the responsibility of the user of this document to comply with all applicable intellectual property laws. Without limiting any rights related to this document, no part of this document may be copied, reproduced or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the expressed permission of Alfa Laval Corporate AB.

This manual is also suitable for:

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