Alfa Laval LKHex Instruction Manual
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Alfa Laval LKHex Instruction Manual

Centrifugal pump
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Instruction Manual
LKHex Centrifugal Pump
ESE02224-EN15
Original manual
2022-11

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Summary of Contents for Alfa Laval LKHex

  • Page 1 Instruction Manual LKHex Centrifugal Pump ESE02224-EN15 2022-11 Original manual...

  • Page 3: Table Of Contents

    6.5. Noise emission ..................6.6. Relubrication intervals ................7. Parts list ..................7.1. Drawing LKHex-10, -15, -20, -25, -35, -40, -45, -50, -60, -70 sanitary version ... 7.2. LKHex - Wet end (LKH-10 -70) ..............7.3. LKHex - Motor dependent parts (LKH-10 - 70) ..........

  • Page 4: Declarations Of Conformity

    Declaration of of of Conformity Conformity Declaration Conformity The Designated Company Alfa Laval Kolding A/S, Albuen 31, DK-6000 Kolding, Denmark, +45 79 32 22 00 Company name, address and phone number Hereby declare that Pump Designation LKHex-10, LKHex-15, LKHex-20, LKHex-25, LKHex-35, LKHex-40, LKHex-45, LKHex-50, LKHex-60, LKHex-70 Type Serial number from 245.600 to 1.000.000...
  • Page 5 Declaration Declaration of of of Conformity Conformity Conformity The Designated Company Alfa Laval Kolding A/S, Albuen 31, DK-6000 Kolding, Denmark, +45 79 32 22 00 Company name, address and phone number Hereby declare that Pump Designation LKHex-10, LKHex-15, LKHex-20, LKHex-25, LKHex-35, LKHex-40, LKHex-45, LKHex-50, LKHex-60, LKHex-70 Type Serial number from 245.600 to 1.000.000...

  • Page 6: Atex Directive 2014/34/Eu

    Centrifugal pumps supplied with an ATEX symbol are classified for use in potentially explosive atmospheres under ATEX Directive 2014/34/EU Group II, Categories 2 and 3. Technical File Ref: LKHex LKHex - - - Document LKHex Document r r r efer Document efer...

  • Page 7: Atex Marking

    1 Declarations of Conformity 1.2 ATEX Marking Name Name Name plate plate plate example: example: example: 11.0kW 50Hz SSS Shaft seal type (single shaft seal) Max power output at 50Hz Impeller diameter (Ø163) II 2 G ATEX marking - directve part Ex h IIB T4 Gb Ta -20C to +40C Ambient temperature limit.
  • Page 8 1 Declarations of Conformity Name plate position See marking options in chapter 2.3 Special conditions for safe use, table A.

  • Page 9: Safety

    2 Safety Unsafe practices and other important information are emphasised in this manual. Warnings are emphasised by means of special signs. Always Always read Always read read the the manual manual before manual before before using using using the the pump! pump! pump! 2.1 Important information...

  • Page 10: Special Conditions For Safe Use

    Note Ensure that the chosen elastomer is compatible with the process media and the media temperature (see chapter 4.2 for more information). Note Note Note The LKHex can only be marked for category 2G but can be used for 3G applications also.
  • Page 11 2 Safety All warnings in the manual are summarised in this section. Pay special attention to the instructions below so that severe personal injury and/or damage to the pump are avoided. Requir Requir Requir ements ements ements for for measur measur ements measur ements on on...
  • Page 12 2 Safety All warnings in the manual are summarised in this section. Pay special attention to the instructions below so that severe personal injury and/or damage to the pump are avoided. “b1” “b1” “b1” contr control ol ol system contr system r r r equir system equir...

  • Page 13: Safety Precautions

    Never restart the pump automatically after a system lockout. At restart, it must be ensured that the pump is running within Never the specifications given in chapter 4.2 Operating conditions. The Alfa Laval pump selection program can be acquired from your local Alfa Laval sales company.
  • Page 14 Never service the pump if pressurised. Never Always Always check for any abnormal sounds or running behaviors when starting up the pump after maintenance. Always Always use Alfa Laval genuine spare parts. Always Always Motors with with gr gr grease...

  • Page 15: Unpacking/Delivery

    3. Motor instructions. 4. Test certificate, IF ORDERED! CAUTION CAUTION CAUTION Alfa Laval cannot be held responsible for incorrect unpacking. W W W ARNING: ARNING: ARNING: 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 16: 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...
  • Page 17 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. Step...

  • Page 18: Pre-Use Check - Pump Without Impeller Screw

    3 Installation Read the instructions carefully and pay special attention to the warnings! LKHex-10 to -60 is 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 19: Pre-Use Check With Impeller Screw

    3 Installation Read the instructions carefully and pay special attention to the warnings! LKHex-10 to -60 is 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 20: Recycling Information

    3 Installation Read the instructions carefully and pay special attention to the warnings! LKHex-10 to -60 is 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 21: Operation

    4 Operation Read the instructions carefully and pay special attention to the warnings! 4.1 Important check and monitoring during operation Daily Daily checks Daily checks checks - Shaft seal (SSS and DMS) If leakage from the shaft seal can lead to dangerous situations, daily visual inspection for leakage is recommended. - If leakage is detected the risk should be evaluated and maintenance of the seal should be planned accordingly.

  • Page 22: Operating Conditions

    4 Operation Read the instructions carefully and pay special attention to the warnings! 4.2 Operating conditions General: General: General: Maximum ambient temperature: -10°C to +35°C for T4, motor with shroud -10°C to +40°C for T4, motor without shroud -10°C to +40°C for T3 Maximum pump speed: 3600 rpm Only Exd and Exde motors are designed to run with a variable speed drive (VDF).

  • Page 23: Operation/Control

    Step 1 1 1 Always Always read the technical data thoroughly. See chapter 6 Technical data Always CAUTION CAUTION CAUTION Alfa Laval cannot be held responsible for incorrect operation/control. Step 2 2 2 Step Step Danger Danger of of of bur Danger...
  • Page 24 4 Operation Read the instructions carefully and pay special attention to the warnings! Step Step Step 4 4 4 Do not not allow allow to to to allow CAUTION CAUTION CAUTION The shaft seal must not run dry. run dry CAUTION CAUTION CAUTION...

  • Page 25: Trouble Shooting

    4 Operation Pay attention to possible faults. Read the instructions carefully. 4.4 Trouble shooting NOTE! NOTE! NOTE! Read the maintenance instructions carefully before replacing worn parts. Remedy Pr Pr Problem oblem oblem Cause/r esult esult Remedy Remedy Cause/r Cause/r esult Overloaded motor - Pumping of viscous liquids - Larger motor or smaller impeller...

  • Page 26: Recommended Cleaning

    4 Operation The pump is designed for cleaning in place (CIP). CIP = Cleaning In Place. Read the instructions carefully and pay special attention to the warnings! NaOH = Caustic soda. = Nitric acid. 4.5 Recommended cleaning Step 1 1 1 Step Step Caustic...

  • Page 27: Maintenance

    Or Or dering spar parts Contact your local Alfa Laval sales company. Note: Note: Note: If the pump is supplied with FEP O-rings, Alfa Laval recommends that the casing O-ring is replaced during pump maintenance.
  • Page 28 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. Rubber seals seals Motor bearings...

  • Page 29: Dismantling Of Pump/Shaft Seals

    : Relates to the shaft seal. 5.2 Dismantling of pump/shaft seals Step Step Step 1 1 1 1. LKHex-10 to -70: Unscrew cap nuts (24) and remove washers (24a) and pump casing (29). Step Step Step 2 2 2 Double...
  • Page 30 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 Step Step 5 5 5 1. Pull off the O-ring (26) from back plate (25). 2.

  • Page 31: 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. 5.3 Assembly of pump/single shaft seal Step 1 1 1 Step Step 1. Remove spring (13). NOTE! NOTE! NOTE!
  • Page 32 Step 9 9 9 Step Step 1. LKHex-10 to -70: Fit pump casing (29), washers (24a) and cap nuts (24). 2. Adjust the pump casing to the right position. 3. LKH-10 to -70: Tighten nuts (20) for back plate (25) and tighten cap nuts (24).

  • Page 33: 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. 5.4 Assembly of pump/double mechanical shaft seal Step Step Step 1 1 1 1.
  • Page 34 2. Lubricate the impeller hub with silicone grease or oil. 3. Screw impeller (27) onto stub shaft (7). 4. Fit impeller screw (36) and tighten, if used. LKHex 10-60: 20 Nm (15 lbf-ft) LKHex 70: 50 Nm (37 lbf-ft) Step...

  • Page 35: Adjustment Of Shaft (Lkhex-10 To -70)

    Lubricate the rubber seals before fitting them. : Relates to the shaft seal. 5.5 Adjustment of shaft (LKHex-10 to -70) 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 1. Fit impeller (27) on stub shaft (7). 2. Ensure that the clearance between the impeller and back plate (25) is correct: 0.5mm (0.02 inch) for LKHex 10, 15, 20, 25, 35, 45, 50 and 60 and 1.0mm (0.039 inch) for LKHex 40 and 70.

  • 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 resistance. The LKH pump is available in the following sizes LKHex -10, -15, -20, -25, -35, -40, -45, -50, -60 and -70.

  • Page 38: Technical Information And Description Of Mechanical Shaft Seals

    6 Technical data It is important to observe the technical data during installation, operation and maintenance. Inform personnel about the technical data. 6.2 Technical information and description of mechanical shaft seals General General considerations General considerations considerations r r r egar egar egarding ding mechanical...

  • Page 39: Torque Specifications

    Size Size lbf lbf lbf- - - ft ft ft 14.8 29.5 49.0 81.0 6.4 Weight (kg) Pump T T T ype: ype: LKHex LKHex Pump Pump ype: LKHex Size Size Size 1.5kW 2.2kW 5.5kW 7.5kW...

  • Page 40: Noise Emission

    (dBA) (dBA) Pump Pump type Sound Sound essur level (dBA) LKHex-10 LKHex-15 LKHex-20 LKHex-25 LKHex-35 LKHex-40 LKHex-45 LKHex-50 LKHex-60 LKHex-70 The noise measurements are carried out using the original motor and shroud, at the approximate Best Efficiency Point (BEP) with water at ambient temperature and at 50Hz.

  • Page 41: Relubrication Intervals

    50%. The lubrication interval for vertically mounted pumps is half the value stated in the table. WEG IEC IEC Motors Motors Motors Motor LKHex (Exd/Exde) Motor LKHex (Exe) Power power (kW) (kW)

  • Page 42: Parts List

    Always use Alfa Laval genuine spare parts. Always refer to the pump serial no. on the name plate when ordering spare parts to ensure correct spares. 7.1 Drawing LKHex-10, -15, -20, -25, -35, -40, -45, -50, -60, -70 sanitary version Impeller screw...

  • Page 44: Lkhex - Wet End (Lkh-10 -70)

    7 Parts list The drawing shows the LKHex, sanitary version. Always use Alfa Laval genuine spare parts. Always refer to the pump serial no. on the name plate when ordering spare parts to ensure correct spares. 7.2 LKHex - Wet end (LKH-10 -70)
  • Page 45 7 Parts list The drawing shows the LKHex, sanitary version. Always use Alfa Laval genuine spare parts. Always refer to the pump serial no. on the name plate when ordering spare parts to ensure correct spares. Parts Parts Parts list...

  • Page 46: Lkhex - Motor Dependent Parts (Lkh-10 - 70)

    The drawing shows the LKHex, sanitary version. Always use Alfa Laval genuine spare parts. Always refer to the pump serial no. on the name plate when ordering spare parts to ensure correct spares. 7.3 LKHex - Motor dependent parts (LKH-10 - 70)
  • Page 47 7 Parts list The drawing shows the LKHex, sanitary version. Always use Alfa Laval genuine spare parts. Always refer to the pump serial no. on the name plate when ordering spare parts to ensure correct spares. Parts Parts Parts list...

  • Page 48: Lkhex - Shaft Seal

    7 Parts list The drawing shows the LKHex, sanitary version. Always use Alfa Laval genuine spare parts. Always refer to the pump serial no. on the name plate when ordering spare parts to ensure correct spares. 7.4 LKHex - Shaft seal...
  • Page 49 7 Parts list The drawing shows the LKHex, sanitary version. Always use Alfa Laval genuine spare parts. Always refer to the pump serial no. on the name plate when ordering spare parts to ensure correct spares. Parts Parts Parts list...
  • Page 50 7 Parts list The drawing shows the LKHex, sanitary version. Always use Alfa Laval genuine spare parts. Always refer to the pump serial no. on the name plate when ordering spare parts to ensure correct spares. Denomination Denomination Denomination EPDM...
  • Page 52 © 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.

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