background image

 

                                                                                                                                                                         

 

10 

 

Pipes should be support  independently  of  the  pump so  as  not  to  put  any 
strain  on  the  pump  casing.  Suction  piping,  if  not  properly  installed,  is  a 
potential  source  of  faulty  operation.  Suction  lines  should  be  free  of  air 
leaks,  and  arranged so there  are  no loops  or  high  spots  in  which  air  can 
be  trapped.  Generally,  the  suction  line  is  larger  than  the  pump  suction 
nozzle, and eccentric reducers should be used. Eccentric reducers are not 
necessary  for  bottom suction  pumps.  If  the liquid  supply  is  located below 
the pump centre line, the reducer should be installed with the straight side 
up.  Most  often  air  enters  the  suction  pipe  entrained  in  the  liquid. 
Installations with a static suction lift preferably should have the inlet of the 
vertical  suction  piping  submerged  in  the  liquid  to  four  times  the  piping 
diameter.  

A  large  suction  pipe  will  usually  prevent  the  formation  of  vortexes  or 
whirlpools,  especially  if  the  entrance  is  flared.  A  floating  vortex  breaker 
(raft) around the suction piping may be provided if a tendency appears for 
a vortex to form at the liquid surface.  A baffle placed in front of A stream 
of  liquid  falling  into  the  sump  near  the  intake  pipe  will  churn  air  into  the 
liquid.  The  supply  line  should  extend  down  into  the  sump.  Liquid  supply 
entering  a  well  perpendicular  to  the  intake  line  tends  to  rotate  the  liquid, 
which interferes with short the supply pipe will remedy for this situation. A 
elbow should never to bolted directly to the pumps suction nozzle.  

The  disturbance in  the  flow  caused by  the  sharp bend  so  near the  pump 
inlet  may  result  in  noisy  operation,  loss  in  efficiency,  and  capacity,  and 
heavy  end  thrust.  A  long  sweep  or long  radius  elbow  placed as far  away 
from the pump as practicable should be used if a bend is necessary in the 
suction line. If separate suction lines cannot be used for each pump, then 
a tapering header with Y-branches should be used.  

A  straight  branch  header  should  never  be  used.  Prior  to  installing  the 
pump,  suction  piping  and  pump  should  be  inspected  internally,  cleaned 
and flushed. If a strainer is installed in the suction line, the openings in the 
screen  must  be  checked  and  cleaned  periodically.  The  opening  must  be 
smaller than the sphere size allowed by the impeller. 

The flow velocity in the suction piping should be 1.5 to 2.5 mts 
/sec., for normal cases, but should not exceed 3 mts /sec 

Summary of Contents for AD Series

Page 1: ...1 OPERATION AND MAINTANACE MANUAL AD A B TU SPLIT CASING PUMPS SAM TURBO INDUSTRY PVT LIMITED NEELAMBUR COIMBATORE 641062 INDIA PHONE 914226193555 E MAIL service sampumps com...

Page 2: ...ur liability in respect of any complaint is limited to replacing part parts free of charge ex works or repairs of the defective part parts only to the extent that such replacement repairs are attribut...

Page 3: ...SERVATION OF PUMPS 3 DESCRIPTION OF PUMP 4 ERECTING THE PUMP 5 LAYING AND CONNECTING PIPES 6 LUBRICATION 7 STARTING AND STOPPING 8 SUPERVISION AND MAINTENANCE STUFFING BEARING 9 DISMANTLING AND ASSEMB...

Page 4: ...nsure that the equipment remains in good condition FORWARD AND GUARANTEE This erection and operating manual should in all cases be read by your fitters before erection and start up We are not liable f...

Page 5: ...Suction and discharge flanges should be covered to prevent the entry any kind of foreign environment The surfaces to be preserved should be covered with the preservatives suitable for storing environm...

Page 6: ...ump shaft suction delivery nozzles are being located in the lower half With this arrangement it is not necessary to disconnect suction or discharge piping to make repairs to or replace the rotating el...

Page 7: ...mon base plate is done in our works the whole set will be carefully mounted and aligned It is necessary to check once more the alignment of the coupling before putting the pump into operation The eye...

Page 8: ...ater 3 Pour grout Tamp liberally while pouring in order to fill all cavities and prevent air pockets The space between the foundation and base plate should be completely filled with grout In order to...

Page 9: ...oints should remain same when both couplings are turned through an angle Maximum permissible tolerance is 0 05mm The permissible tolerance being 0 05mm provided that the type of coupling is such as to...

Page 10: ...A baffle placed in front of A stream of liquid falling into the sump near the intake pipe will churn air into the liquid The supply line should extend down into the sump Liquid supply entering a well...

Page 11: ...valve and gate valve with the check valve being between the pump and the gate valve The check valve prevents reverse flow and protects the pump from excessive backpressure The gate valve is used to is...

Page 12: ...12...

Page 13: ...shipment For bearings the following greases are recommended which are available in the market firm name 1450rpm 2900 rpm INDIAN OIL SERVOGEM 3 SERVOGEM 2 CALTEX STARFAK 3 STARFAK 2 HIND PETROLEUM NATR...

Page 14: ...3AD 12 4AD 8 4AD 9 5 4AD 11 4AD 14 6AD 8 5 6AD 11 Gr IV V 84 4 AD 11 5 4 AD 18 5 6 AD 9 5 6 AD 11 5 6 AD 14 6 AD 16 5 8 AD 11 Gr VI 112 8 AD 13 5 8 AD 17 10 AD 11 5 10AD 13 5 GRAMS MODEL 84 3TU 13 112...

Page 15: ...llowed to escape through the vent valve while filling 7 If the pump operates on a suction lift and no foot valve is provided use a vacuum pump or ejector operated by air steam water etc to evacuate ai...

Page 16: ...buildup in the pump because of absorption of the input power into the pumped fluid Other less understood reasons for restrictions are 1 Increased radial reaction at low flows in single volute casings...

Page 17: ...ng must be positioned such that the water seal connection is opposite lantern ring 5 Clean out the stuffing box 6 Inspect shaft sleeve if it is scored or grooved it should be replaced 7 Make sure the...

Page 18: ...specifications When these clearances are doubled or the capacity of the pump is reduced by 5 to 10 the rings should be renewed The purpose of these rings is to keep internal bypassing of the liquid b...

Page 19: ...the vanes The impeller must be installed with the vanes in the same direction Remove Impeller Rings It is not necessary to remove the impeller from the shaft to replace the impeller rings First remove...

Page 20: ...DE side to bearing housing 8 The complete set of rotating assembly to be placed with bottom casing bearing housings should be carefully placed on locating pin Tight the bearing housing casing joint b...

Page 21: ...ructural unit will be inserted into the pump casing lower half part no 1B taking care that the half collar of the neck bushes part no 63 is inserted in such a way that it is not towering the gasket an...

Page 22: ...are for reference only and are subjected to change without prior notice NOTE Clearance are for standard bronze or cast iron fitted pumps For materials with a tendency to gall such as stainless steel i...

Page 23: ...G 1 NO A35 ID2 835 XOD3 490X1 32 BRG COVER 2 NOS ID6 25 XOD8 X0 8 ST BOX 2 NOS ID8 XOD11 X1 ADOPTER 2 NOS 14 4 AD 11 5 6209 3209 ID2 18 X0 375 10 SQ ID1 94 X 0 103 SLEEVE 2 NOS ID7 25 X 0 139 ST BOX 2...

Page 24: ...70X 3 6 SLEEVE 2 NOS ID5 5 32 XOD7 3 8 X0 06 BRG COVER 2 NOS 1000X1000X1 CASING 1 NO ID68 07XOD92 07X1 SUC SLEEVE 1 NO 4 12 A 19 B 6316 7316 2 ID109 47X OD142X 16 Sq 10 NOS ID38XDIA3 SLEEVE 2 NOS 1000...

Page 25: ......

Page 26: ...sing upper half in accordance with figure see Instructions the flange screws Recommended Spare Parts Spare parts should already be in stock at the client s for the initial startup In order to minimize...

Page 27: ...lock washer 1 14 Shaft sleeve 2 71 Adopter 2 16 Inboard bearing 1 73 1 Gasket casing 1 17 Gland 2 73 2 Adopter Gasket 2 17B Gland bolt 4 73 3 Stuffing box gasket 2 18 Outboard bearing 1 73 4 Bearing c...

Page 28: ......

Page 29: ...2 8 Impeller wear ring 2 41 Bearing cap 2 13 Gland packing 6 6 46 Coupling key 1 14 Shaft sleeve 2 63 Stuffing box bushing 2 16 Ball bearing 1 68 Shaft collar 2 17 Gland 2 69A Brg lock washer 1 18 Ou...

Page 30: ......

Page 31: ...aring cap 2 13 Gland Packing 2 Set 48 Coupling key 1 14 Shaft sleeve 2 58 Interstage sleeve 1 16 Bearing DE 1 63 Stuffing box bush 2 17 Gland 2 68 Shaft collar 2 17B Bolt Gland Cas 4 69A Brg lock wash...

Page 32: ......

Page 33: ...ing or mechanical seal 9 10 24 26 28 32 33 34 35 36 37 38 39 48 Excessive noise or vibration of Pump 2 3 4 5 6 7 15 18 23 24 25 26 27 28 31 35 36 40 42 43 44 46 49 Overheating or excessive wear of bea...

Page 34: ...4 Bent shaft 5 Rubbing of rotating parts on fixed parts 6 Worn bearings 7 Worn wear rings distance sleeves and throat bushes 8 Wrong design of suction line leading to asymmetrical flow or vortexing 9...

Page 35: ...mechanical seal damaged 26 Incorrectly adjusted mechanical seal wrong spring tension 27 Incorrectly installed rotor shaft nuts loose 28 Unsuitable lubricant 29 Oil level too low 30 Inner leaking due...

Page 36: ......

Reviews: