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Desmi ESLHT/-17 W180, Operation And Maintenance Instructions, Page: 1 / 20

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OPERATION AND MAINTENANCE INSTRUCTIONS 

 
 

DESMI end suction centrifugal pump 

 

ESLHT/-17 W180 

 
 

 

 

DESMI Pumping Technology A/S 

Tagholm l, DK-9400 Nørresundby, Denmark 

 

      Tel.:   +45 96 32 81 11 

Fax:   +45 98 17 54 99 

E-mail: 

[email protected]

 

Internet: 

www.desmi.com

  

 

 

Manual: 

T1539 

 

Language: 

English 

 

Revision: 

B(01/2022) 

 

Special pump No. ...............................................

 

 

 

Summary of Contents for ESLHT/-17 W180

Page 1: ...ction centrifugal pump ESLHT 17 W180 DESMI Pumping Technology A S Tagholm l DK 9400 Nørresundby Denmark Tel 45 96 32 81 11 Fax 45 98 17 54 99 E mail desmi desmi com Internet www desmi com Manual T1539 Language English Revision B 01 2022 Special pump No ...

Page 2: ...ANTLING SHAFT SEAL BEARING 8 5 3 INSPECTION 9 6 ASSEMBLING 11 6 1 FITTING CARBON BEARING AND VORTEX BREAKER 11 6 2 FITTING SHAFT WITH BEARINGS 11 6 3 FITTING SHAFT SEAL 11 6 4 FITTING BEARING HOUSE 12 6 5 FITTING IMPELLER 12 6 6 FITTING REAR COVER 12 6 7 FITTING COUPLING AND MOTOR 12 6 8 SHAFT 13 7 FROST PROTECTION 13 8 DISMANTLING 13 9 START UP 13 9 1 START UP 13 10 SYSTEM BALANCING 14 11 INSPECT...

Page 3: ...ction pressure pump size speed current shaft seal and maximum ambient temperature make it possible Max operating pressure and speed ranges are specified in operational data If the pump is to be used for liquids other than water other rubber types are likely to be used for O rings and any other materials for the other liquid affected parts of the pump contact DESMI accordingly 1 1 DELIVERY Check on...

Page 4: ...on the motor type supplied as the noise from the pump can be calculated as the noise level of the motor 2dB A The noise level is for pumps with electric motors The capacity of the pump appears from the name plate on the pump If the pump has been delivered without motor the pump capacity is to be indicated on the plate when mounting the motor The permissible loads on the flanges appear from the fol...

Page 5: ...agraph 2 2 are to be observed At installations pumping hot or very cold liquids the operator must be aware that it is dangerous to touch the pump surface and consequently he must take the necessary safety measures 3 2 WIRING Wiring to be carried out by authorised skilled workmen according to the rules and regulations in force 4 TRANSPORT STORAGE The weights of the pumps in standard combination wit...

Page 6: ...fore it is dismantled from the piping system If the pump has been pumping dangerous liquids you are to be aware of this and take the necessary safety measures If the pump has been pumping hot liquids take great care that it is drained before it is removed from the piping system 5 1 DISMANTLING OF ESLHT25 180N A 17 W180 ESLHT40 180N A 17 W180 5 1 1 DISMANTLING COUPLING Dismantle the stainless steel...

Page 7: ...logy A S 7 www desmi com Tagholm 1 9400 Nø rresundby Denmark Tel 45 96 32 81 11 Fax 45 98 17 54 99 E mail desmi desmi com fan 47 5 1 2 DISMANTLING REAR COVER AND IMPELLER Unscrews the set screws 37 Unscrew the nut washer 22 51 52 Remove rear cover unit Remove the cap nut 24 washer 23 37 51 52 22 24 23 ...

Page 8: ...rresundby Denmark Tel 45 96 32 81 11 Fax 45 98 17 54 99 E mail desmi desmi com Remove the impeller 5 and O ring 3 5 1 3 DISMANTLING SHAFT SEAL BEARING Remove the impeller key 19 Unscrew nut washer 16 18 50 Lift the bearing with bearing housing Unscrew the mechanical point screw and remove the mechanical seal 10 and O ring 27 5 3 19 10 27 32 35 ...

Page 9: ...ews 35 36 and remove the grease nipple 32 Remove the key 34 Remove the bearing cover 20 Take out the shaft with ball bearing Take out the oil seal ring 11 Remove the SNAP ring 12 and take out the ball bearing 13 grease valve ring 14 and orifice ring 31 Unscrew the counter sunk allen screws 48 the carbon bearing 4 5 3 INSPECTION When the pump has been dismantled check the following parts for wear a...

Page 10: ...esundby Denmark Tel 45 96 32 81 11 Fax 45 98 17 54 99 E mail desmi desmi com Pump casing impeller Max clearance 0 3 0 6 mm measured in radius Shaft seal shaft seal cover Check the seat for flatness and cracks Check the rubber parts for elasticity Bearings Replace in case of wear and noise Sliding bearing shaft Wear max 0 5 mm diameter difference ...

Page 11: ...ate the inner surface of the slide ring rubber bellows with soapy water and push it over the shaft The use of a conical fitting bush as shown on the assembly drawing is recommended to avoid that the rubber bellows is cut Push the slide ring over the shaft with the hand If the rubber bellows is tight use a fitting tool and take care that the slide ring is not damaged If the carbon ring is not fixed...

Page 12: ...e shaft and lead the impeller towards the shoulder of the shaft Secure the impeller 5 with washers 23 and Domed cap nut 24 6 6 FITTING REAR COVER Place the O ring 3 between pump casing and rear cover 7 in the O ring groove and hold it with a little grease However check the material of the O ring first As standard the material is VITON Fit and fasten rear cover in the pump casing 6 7 FITTING COUPLI...

Page 13: ...r pump has been drained ATTENTION For safety reasons the pump is only allowed to operate against closed discharge valve for a short time max 5 minutes and at a max temperature of 180 C Otherwise there is a risk of damage to the pump and at worst of a steam explosion If the pump is not monitored the installation of a safety device is recommended Pumping water through a passive continuous pump is no...

Page 14: ... necessary to check either the quantity of liquid delivered or the power consumption of the pump e g by measuring the current intensity of the connected motor Together with a reading of the differential pressure the quantity of water delivered can be determined against the characteristics of the pump Should the pump not function as intended please proceed according to the fault finding list Bear i...

Page 15: ...ipe plug 2 at the bottom of the pump and shaft seal chamber 12 REPAIRS 12 1 ORDERING SPARE PARTS When ordering spare parts please always state pump type serial No appears on the name plate of the pump position No on the assembly drawing and designation on the spare parts list The following parts are exposed to wear Shaft seal 10 impeller 5 carbon bearing 4 O rings 3 and 27 oil seal ring 11 and the...

Page 16: ... area on the shaft Press the shaft seal on to the shaft until it resists Press the driving ring only Finally It has to be made sure the length from shaft seal end to bearing house flange being within 44 0 5mm of the nominal length And lock it with the pointed screw The ELK shaft seals must be turned after installation so O rings springs and sliding surfaces can slip into right placement before pre...

Page 17: ...ure increase caused by the pump and number of revolutions are allowed in standard pumps Pump Max working pressure bar SG iron Max working pressure bar SS Max RPM ESLHT25 180 14 16 3600 ESLHT40 180 14 16 3600 The above max operating pressure is valid at 180 C water The above mentioned max working pressure is a design value delivered pumps are pressure tested according to actual application requirem...

Page 18: ... 809 1998 A1 2009 Pumps and pump units for liquids Common safety requirements EN12162 2001 A1 2009 Liquid pumps Safety requirements Procedure for hydrostatic testing EN 60204 1 2006 A1 2009 Safety of machinery Electrical equipment of machines item 4 General requirements Ecodesign Directive 2009 125 EC Water pumps Commission Regulation No 547 2012 Applies only to water pumps marked with the minimum...

Page 19: ... 15 INFORMATION RELEVANT FOR DISASSEMBLY OR DISPOSAL AT END OF LIFE No damage materials are used in DESMI pumps please refer to DESMI Green Passport can be sent on request contact a DESMI sales office i e common recycling companies can handle the disposal at end of life Alternatively the pump and motor can be returned to DESMI at end of life for safe recycling 16 ASSEMBLY DRAWING ESLHT25 180N 17 W...

Page 20: ...32 Grease nipple 52 Spring washer 5 Impeller 19 Key 33 Bearing support 53 Tee 6 Shaft 20 Bearing cover 34 Key 54 Hexagon nipple 7 Rear cover 21 Stud 35 Set screw 55 Pipe Plug 8 Vortex Break 22 Nut 36 Set screw 9 Sunk screw 23 Washer 37 Set screw 10 Mechanical seal 24 Cap nut 38 Coupling 11 Oil seal ring 25 Washer 39 Coupling guard 12 Snap ring 26 Bush 45 Baseplate 13 Ball bearing 27 O ring 47 Cool...

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