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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 6

1. Remove the stationary seal ring (11).
2. Remove the O-ring (12) from back plate (25).

*) Use the tool supplied. Left hand thread!

Step

Step 7

Flushed

Flushed shaft

shaft

shaft seal:

seal:

1. Remove screws (41) and seal housing (40).
2. Pull out lip seal (43) from the seal housing.

Step

Step 8

Double

Double mechanical

mechanical

mechanical shaft

shaft

shaft seal:

seal:

1. Remove screws (41) and seal housing (40a).
2. Remove rotating seal rings (14) and drive ring (52) from

spring (13).

3. Remove O-rings (15) from rotating seal rings (14).
4. LKH-70 to 90: Remove cups (54) from rotating seal rings.

Step

Step 9

Double

Double mechanical

mechanical

mechanical shaft

shaft

shaft seal:

seal:

1. Remove stationary seal ring (51) from seal housing (40a).
2. Remove O-ring (50) from stationary seal ring (51).
3. Remove O-ring (44) from seal housing (40a).

Step

Step 10

1. Remove the complete shaft seal from stub shaft (7).
2. Remove spring (13) and rotating seal ring (14) from the drive

ring (10).

Содержание LKH Series

Страница 1: ...ESE00698 EN30 2022 07 Original manual Instruction Manual LKH Centrifugal Pump...

Страница 2: ......

Страница 3: ...ommended cleaning 24 5 Maintenance 26 5 1 General maintenance 26 5 2 Cleaning Procedure 28 5 3 Dismantling of pump shaft seals 29 5 4 Assembly of pump single shaft seal 32 5 5 Assembly of pump flushed...

Страница 4: ...40 LKH 45 LKH 50 LKH 60 LKH 70 LKH 85 LKH 90 Type Serial number from AAB000000001 to AAB999999999 Serial number from 10 000 to 1 000 000 Serial number from 100700000001 100799999999 is in conformity...

Страница 5: ...plete manual manual manual for for for the the the supplied supplied supplied product product product Skills Skills Skills for for for personal personal personal Operators Operators Operators The The...

Страница 6: ...s Always Always Always read read read the the the manual manual manual before before before using using using the the the pump pump pump 2 2 Warning signs General General General warning warning warni...

Страница 7: ...ways Always remove the impeller before checking the direction of rotation Never Never Never start the pump if the impeller is fitted and the pump casing is removed Pump Pump Pump with with with Impell...

Страница 8: ...age of lubricants can occur Always Always Always transport the pump in its upright position Always Always Always ensure that the unit is securely fixed during transportation Always Always Always use t...

Страница 9: ...ngers The pump should be supported underneath the adaptor when not installed in the process line Check Check Check the the the delivery delivery delivery for for for 1 Complete pump 2 Delivery note 3...

Страница 10: ...oud if fitted before lifting the pump Remove the shroud before lifting Step Step Step 5 5 5 ONLY ONLY ONLY LKH LKH LKH 85 85 85 and and and LKH LKH LKH 90 90 90 Do NOT NOT NOT use eyebolt in casing to...

Страница 11: ...hen 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...

Страница 12: ...O Outlet I Inlet Step Step Step 4 4 4 1 Ensure that the pipelines are routed correctly 2 Ensure that the connections are tight 3 Remember seal rings Few bends Correct Step Step Step 5 5 5 Avoid Avoid...

Страница 13: ...se 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 Step Step 6 6 6 Ensure correct alignment...

Страница 14: ...p sizes are very heavy Alfa Laval therefore recommends the use of a lifting crane when handling the pump No gaps between connections on pump inlet and inlet pipe and pump outlet and outlet pipe Angel...

Страница 15: ...s 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 cr...

Страница 16: ...k 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 Note Note Note In case of shaft seal leakage the med...

Страница 17: ...k 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 Always ensure the adapt...

Страница 18: ...d pump casing 29 B LKH 10 to 60 Remove cap nuts 24 washers 24a and pump casing 29 2 Remove impeller 27 see also instruction in section 5 4 Assembly of pump single shaft seal Step Step Step 2 2 2 Warni...

Страница 19: ...before operation See the indication label on the pump 3 4 Pre use check pump with impeller screw Never Never Never start in the wrong direction of rotation with liquid in the pump 1 Connect power sup...

Страница 20: ...Metal straps should be sent for material recycling Maintenance Maintenance Maintenance During maintenance oil and wearing parts in the machine are replaced All metal parts should be sent for material...

Страница 21: ...AUTION Alfa Laval cannot be held responsible for incorrect operation control Step Step Step 2 2 2 Never Never Never touch the pump or the pipelines when pumping hot liquids or when sterilising Step St...

Страница 22: ...anical flushed mechanical flushed shaft shaft shaft seal seal seal 1 Connect the inlet of the flushing liquid correctly 1 8 G 2 Regulate the water supply correctly For LKH 85 connect inlet outlet of t...

Страница 23: ...er counter pressure throttling Lamination of precipitates from the liquid Frequent cleaning Cavitation Damage Low inlet pressure Increase the inlet pressure Pressure reduction sometimes to zero High l...

Страница 24: ...e protective goggles Step Step Step 2 2 2 Never Never Never touch the pump or the pipelines when sterilising Step Step Step 3 3 3 Examples Examples Examples of of of cleaning cleaning cleaning agents...

Страница 25: ...ing a cleaning agent NOTE NOTE NOTE Cleaning agents must be stored disposed of in accordance with current regulations directives Always Always Always rinse rinse rinse Clean water Cleaning agent NOTE...

Страница 26: ...2 2 Never Never Never service the pump when it is hot Step Step Step 3 3 3 Never Never Never service the pump when pump if pressurised CAUTION CAUTION CAUTION Fit the electrical connections correctly...

Страница 27: ...nths months months one shift Complete shaft seal Replace when replacing the shaft seal Maintenance after leakage leakage normally starts slowly Replace Replace Replace at at at the the the end end end...

Страница 28: ...nk with 2 caustic wash 3 Scrub the blind tapped impeller screw hole vigorously by plunging a clean 1 2 diameter sanitary bristle pipe brush in and out of the hole for two minutes while submerged 4 Soa...

Страница 29: ...p shaft seals Step Step Step 1 1 1 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 LKH 85 an...

Страница 30: ...w 23 and safety guard 22 Step Step Step 4 4 4 1 Remove impeller screw 36 if fitted 2 Remove impeller 27 If necessary loosen the impeller by knocking gently on the impeller vanes 3 Remove the O ring 38...

Страница 31: ...ouble Double mechanical mechanical mechanical shaft shaft shaft seal seal seal 1 Remove screws 41 and seal housing 40a 2 Remove rotating seal rings 14 and drive ring 52 from spring 13 3 Remove O rings...

Страница 32: ...haft LKH 10 to 90 Step Step Step 2 2 2 1 Refit spring 13 on rotating seal ring 14 2 Fit the spring and the rotating seal ring on drive ring 10 CAUTION CAUTION CAUTION Ensure that the driver on the dri...

Страница 33: ...te 25 2 Carefully guide the back plate onto adaptor 16 3 Fit washers 21 and nuts 20 Step Step Step 6 6 6 Lubricate O ring 26 and slide it onto back plate 25 Step Step Step 7 7 7 1 Lubricate O ring 38...

Страница 34: ...he holes in the adaptor will be covered by the guard Step Step Step 9 9 9 1 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...

Страница 35: ...seal housing 40 3 Fit the seal housing on back plate 25 and tighten screws 41 Note Note Note If change from double mechanical shaft seal to flushed shaft seal the shaft needs to be adjusted see Sectio...

Страница 36: ...g 26 and slide it onto back plate 25 Step Step Step 6 6 6 1 Lubricate O ring 38 and fit it in impeller 37 if impeller screw is used 2 Lubricate the impeller hub with silicone grease or oil 3 Screw imp...

Страница 37: ...y guard 22 and screw 23 and tighten Step Step Step 9 9 9 1 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...

Страница 38: ...seal ring fitted in back plate 25 NOTE NOTE NOTE Ensure that both drive pins on the drive ring enter the notches in rotating seal rings If change from single shaft seal to double mechanical shaft sea...

Страница 39: ...26 and slide it onto back plate 25 Step Step Step 7 7 7 1 Lubricate O ring 38 and fit it in impeller 37 if impeller screw is used 2 Lubricate the impeller hub with silicone grease or oil 3 Screw impe...

Страница 40: ...shaft seal Step Step Step 9 9 9 Fit safety guard 22 and screw 23 and tighten Step Step Step 10 10 10 1 Fit pump casing 29 2 Tighten nuts 20 for back plate 25 3 A LKH 5 Fit clamps 55 55a spring washer...

Страница 41: ...tep 1 1 1 1 Loosen screws 6 2 Pull off stub shaft 7 Step Step Step 2 2 2 1 Push stub shaft 7 onto the motor shaft Screws 4 must fit in the keyway on the motor shaft 2 Check that the clearance between...

Страница 42: ...ical shaft shaft shaft seal seal seal Fit drive ring 52 on stub shaft 7 2 Fit back plate 25 washers 21 and nuts 20 and tighten Step Step Step 5 5 5 1 Fit impeller 27 on stub shaft 7 2 Ensure that the...

Страница 43: ...grease No grease on the motor shaft No grease on the inside diameter of the pump shaft Screws for the compression rings are applied with grease Step Step Step 1 1 1 1 Loosen screws 6 2 Pull off stub s...

Страница 44: ...etween the impeller and back plate 25 is correct 0 5 mm 0 02 inch for LKH10 15 20 25 35 45 50 and 60 and 1 0 mm 0 039 inch for LKH40 70 75 85 and 90 3 Tighten screws 6 evenly until the stub shaft 7 ca...

Страница 45: ...l Product wetted seals EPDM standard Other O rings EPDM standard Alternative seals Nitrile NBR fluorinated rubber FPM and FEP Shaft Shaft Shaft seal seal seal Seal types External single flushed or dou...

Страница 46: ...crews bolts and nuts in this pump Always use the torques specified below if no other values are stated This can be a matter of personal safety Size Size Size Tightening Tightening Tightening torque to...

Страница 47: ...3 73 SolidC 4 72 MR 166 76 MR 185 82 MR 200 81 MR 300 82 GM 54 FM OS 61 The above LKH noise levels are the same for LKHPF LKHI LKH UltraPure LKH Evap and LKHex The above SolidC noise levels are the sa...

Страница 48: ...nitary 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 0 75 1 1 kW Fitting of back plate Flushed sh...

Страница 49: ...on 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 and 3 kW Fitting of legs Fitting of back plate Only used for 55...

Страница 50: ...its The drawing shows the LKH pump sanitary version 7 3 LKH Product wetted parts Parts Parts Parts list list list Pos Qty Denomination If inducer 57 is retrofitted Pump inlet may have to be slightly g...

Страница 51: ...7 Parts list and service kits The drawing shows the LKH pump sanitary version Parts Parts Parts list list list Pos Qty Denomination Parts Parts Parts list list list Pos Qty Denomination 51...

Страница 52: ...arts list and service kits The drawing shows the LKH pump sanitary version Parts Parts Parts list list list Pos Qty Denomination If inducer 57 is retrofitted Pump inlet may have to be slightly ground...

Страница 53: ...The drawing shows the LKH pump sanitary version Parts Parts Parts list list list Pos Qty Denomination Parts Parts Parts list list list Pos Qty Denomination If inducer 57 is retrofitted Pump inlet may...

Страница 54: ...ty Denomination 24 6 Cap nut 24a 6 Washer 28 6 Bolt 26 1 O ring 27 1 Impeller 37 1 Impeller for impeller screw 36 1 Impeller screw 57 1 Inducer 38 1 O ring 25 1 Back plate 20 2 Nut 21 2 Washer 55 1 Up...

Страница 55: ...7 Parts list and service kits The drawing shows the LKH pump sanitary version If inducer 57 is retrofitted Pump inlet may have to be slightly ground 55...

Страница 56: ...arts list and service kits The drawing shows the LKH pump sanitary version Parts Parts Parts list list list Pos Qty Denomination If inducer 57 is retrofitted Pump inlet may have to be slightly ground...

Страница 57: ...7 Parts list and service kits The drawing shows the LKH pump sanitary version 7 4 LKH Motor dependent parts Parts Parts Parts list list list 57...

Страница 58: ...on Pos Qty Denomination If inducer 57 is retrofitted Pump inlet may have to be slightly ground 5a 1 Compression ring with thread 5b 1 Compression ring without thread 6 6 Screw 6a 6 Washer 7 1 Shaft in...

Страница 59: ...arts list and service kits The drawing shows the LKH pump sanitary version Parts Parts Parts list list list Pos Qty Denomination 46 4 Distance sleeve 53 4 Pivot screw Parts Parts Parts list list list...

Страница 60: ...7 Parts list and service kits The drawing shows the LKH pump sanitary version Pos Qty Denomination If inducer 57 is retrofitted Pump inlet may have to be slightly ground 60...

Страница 61: ...wing shows the LKH pump sanitary version Parts Parts Parts list list list Pos Qty Denomination 47 2 Leg bracket 48 4 Nut for leg 49 4 Screw for leg Parts Parts Parts list list list Pos Qty Denominatio...

Страница 62: ...7 Parts list and service kits The drawing shows the LKH pump sanitary version Pos Qty Denomination If inducer 57 is retrofitted Pump inlet may have to be slightly ground 1 1 Motor ABB 1 1 Motor ABB 62...

Страница 63: ...list Pos Qty Denomination Parts Parts Parts list list list Pos Qty Denomination Parts Parts Parts list list list Pos Qty Denomination Parts Parts Parts list list list Pos Qty Denomination 3 50 Hz 230V...

Страница 64: ...7 Parts list and service kits The drawing shows the LKH pump sanitary version 64...

Страница 65: ...7 Parts list and service kits The drawing shows the LKH pump sanitary version 7 5 LKH Shaft seal Parts Parts Parts list list list 65...

Страница 66: ...ng shows the LKH pump sanitary version Pos Qty Denomination If inducer 57 is retrofitted Pump inlet may have to be slightly ground 40 1 Seal housing 41 2 Screw for seal housing 42 2 Tube 42a 2 Fitting...

Страница 67: ...ts Parts Parts list list list Pos Qty Denomination If inducer 57 is retrofitted Pump inlet may have to be slightly ground 11 1 Stationary seal ring 12 1 O ring 13 1 Spring 14 1 Rotating seal ring 15 1...

Страница 68: ...arts list and service kits The drawing shows the LKH pump sanitary version Parts Parts Parts list list list Pos Qty Denomination If inducer 57 is retrofitted Pump inlet may have to be slightly ground...

Страница 69: ...69...

Страница 70: ...LKH Shaft seal and service kits If inducer 57 is retrofitted Pump inlet may have to be slightly ground 70...

Страница 71: ...LKH LKH 90 90 90 9611922867 9611922867 9611922867 9611922868 9611922868 9611922868 9611922869 9611922869 9611922869 9611922870 9611922870 9611922870 Service Service Service kit kit kit for for for sin...

Страница 72: ...LKH Shaft seal and service kits If inducer 57 is retrofitted Pump inlet may have to be slightly ground 72...

Страница 73: ...11922222 9611922222 9611922223 9611922223 9611922223 9611922224 9611922224 9611922224 9611922225 9611922225 9611922225 Service Service Service kit kit kit C SiC C SiC C SiC LKH LKH LKH 40 50 60 40 50...

Страница 74: ...9611922887 9611922887 9611922888 9611922888 9611922888 9611922889 9611922889 9611922889 9611922890 9611922890 9611922890 Parts marked with are included in the service kits Recommended spare parts Serv...

Страница 75: ...75...

Страница 76: ...nd 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...

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