Providing LWSS to Rohru Town in Tehsil Rohru Distt Shimla HP

Amount

Providing of horizontal spindle,horizontal/redial split casing/end suction (backpull out arrangement) Single/double/Multistage centrifugal pumps or combination of pumps,.in series/parallel of recommended make such as KSB/Mather & Platt/Kirloskar/Beaconweir/BE / Grundfos pump/LUBI Pump as per BIS 1520-1980 with upto date ammendments) read with IS 9137-1978 or latest edition suitable for lifting water for under mentioned characteristics with bronze ,impellers/priming funnels,casing ring and shaft sleeves of bronze,shaft of steel grade------- with cast iron casing coupled directely through a flexible coupling on a common CI/cast steel base plate(base plate to be from the manufacturer of the pumping unit only) to slip ring/squirrel cage screen protected drip proof induction motor/motors of standard make such as kirlokar/BHEL/NGEF/GEC/Crompton/ Siemen/Marthon/ABB and suitable for operation on 415(+/-)5% volts,50 cycles/second ,3 phase AC electric supply. The power of electric motor/motors should be at least +15% in excess of the maximum power required by the pump/pumps in the operation range of (+) 10% and (-) 15% of the duty point head.The motor/motors as per IS: 325-1978 with upto date ammendments read with IS: 900-1972. It should include cost of bearing ,nuts,bolts and painting etc. and should meet the following requirements:-

Site Conditions:-

Location of site near by Kamaksha Temple Near JSV Division Rohru

The altitude of place in witch the motor is intended to work in ordinary service if it exceeds 1000Mtr. =215Mtr

Humidity:- Wether generally remaind humid during monsoon season.

Nature of atmosphere:-As normally encountered in Shivalik Range.

Detail of quality of water:-Clear water .

Water free from sand or not :- Yes.

Water corosive or not:- Not.

Turbidity (if any) :- Clear Cold Water .

NPSH avilable :- 8.994 mtrs.

Any other information or requirement. :-

Operating Conditions:-

Type of current :- AC three/single phase.

Operating frequency :- 50 HZ

Rated voltage :- 400(+/-) 10% volts.

System of earthing if any to be adopted.:- Double loop earthing as per BIS 3043-1987 latest with upto date ammandments.

No. of working hours per day :- 8 hours.

Speed of revolution in RPM.:- To be quoted by tenderer.

Direction of rotation:- To be quoted by tenderer.

The max. Temp. of cooling air & water in the place in which the motor is intended to work in ordinary service. :- 25 Dedree centigrade.

Motor:-

Ref to BIS code. :- BIS 325-1978 read with BIS 900-1992 ( latest) with upto date ammendments.

Type of encioure of motor :- SPDP (as per BIS 4691-1985 (Latest)

Type of duty :- Continous.

Mechanical out put in KW. :- Suitable for criving centrifugal pumps required for duties specified againsed pumps. To avoid overloading of motor a margin of about 15-20% may be kept in the rated out put of prime mover.

Class of insulation :- Class -B .

Max. permissible temp. rise of motor reqd. if different from given B(viii) above.:- -----

Particulars of test reqd. & where they are to be conducted.:- As per terms & conditions.

Particulars as to whether voltage limiting device will be employed.:- ATS/ star delta starter of immersed fully automatic to be installed between bus bar chamber & motor.

Shunt capacitor is also proposed to be installed for improving the power factor at site.

Note:- Star delta stater upto 37.5 KW. ATS between 37.5 KW to 50 KW & stater rotor stater with slip ring motor beyond 50 KW.

Motor whether squirrel cage or silpring.:- Squirrel cage/ slipring.

Note:- Squirrel cage upto 65HP and slipring above 65 HP.

Details of shaft extension reqd. :- Just sufficient to provide direct drive by flexible coupling to pump.

Type of slip ring gear whether continously rated or for stating purposes only & whether to be fitted with brush lifting or short circuiting arrangements or both if interlocks are required. :- Continously rated for squirrel cage/ slipring motor.

Breakway torque in terms of rated load torque & the corresponding breakway starting current which may bt taken from the supply with the starting apparatus in circuit. :- Breakway torque to be given by the tenderbut the starting current should not exceed 2.5 times of the full load cutrrent.

Nature of land & any information regarding the driven machine which has been bearing upon the torque reqd. during the accelerated period, the kinetic energy of the moving parts to be accelarated & No. of starts during a specilised period.:- To work the pump offered.

Where possible fault capicity of the system to which the motor is connected.:- The motor should be able to withstand initial current of 2.5 times the rated current for two minutes without suffering damages or permanent deformations.

Pumps (BIS 1520-1980) read with BIS 9137- 1978 both latest with upto date ammendemnts.

Nos of pumps reqd. :- 1 No. working pumps & 1 No. stand bye

Spare parts required. :- For two years normal maintenance s recommended by manufacturer.

Optional fittings reqd. :- Air clock for exahausting air from each stage.

Pump operating conditions :-

Capacity :- 30.2 Lps

Total head in Mts. :- 215

If total total head is not known then following details be provided :-

i) Static head :- 200 Mts.

ii) Minimum depth of water :- ….. Mts.

iii) Variation in water level :- ……..Mts.

iv) Ground level to max. water level :- 1233.00 mts.

v) Ground level to delivery point :- 1584.00 mts.

vi) Presure in the suction tank :- …..kg/cm^2

vii) Pressure in the delivery tank:- …..kg/cm^2

Length of Rising main :- 1300 mts.

Dia of R/main :- 150 mm

Drive arrangment :- Direct through flexible coupling on a common base plate.

Drive type :- Electric driven .

NPSH Reqd. :- To be quoted by the tenderer.

Limits of total head in which the pump is reqd. to operate. :- (-) 25 % to (+) 10 % of total head.

Suction / delivery size of pump. :- To be specified by the tenderer.

Efficency of pump at :- To be specified by the tenderer.

a) Duty head

b) (+) 10% head

c) (-) 25 % head

Material of construction :- To be specified by the tenderer.

(Manufacturer certificate to be appends)

Supply of suitable oil immeresed star delta starter /ATS/stator rotor stater of standard make such as MEI/ Kilburn/ Siemens conforming to BIS: 8544-1979 latest with upto date ammendments for squirrel cage/ slipring motor (make to be specified by the tenderers) mounted on panel board with magnetic type over load release & dashpot, time lag, under voltage release with initial oil filling.

Note:- Star delta stater upto 37.5 KW. ATS between 37.5 KW to 50 KW & stater rotor stater with slip ring motor beyond 50 KW.

Errection of all equipments i/c cost of tees, bends tapers & any other fittings required as per site conditions & as per directions of Engineer-in-charge.

RAJNEESH THAKUR (BID ID -587365)

NIKHIL TEGTA (BID ID -587411)