PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
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The different levels in the reservoir well and the proposed RCC Sump at<br />
intermediate stage pumping station have been indicated in the document based on<br />
which the <strong>Bid</strong>der shall calculate the pump working heads at different conditions. To<br />
calculate the frictional head loss in straight pipe, Hazen William’s formula taking<br />
‘C’ value as 100 shall be considered. In order to estimate the frictional head loss for<br />
bends, curves, valves, specials etc. in the Raw Water rising Main an increment of<br />
20% on the calculated frictional head loss of the rising main shall be considered.<br />
The system may also demand for solo pump operation in varying level conditions of<br />
the reservoir and the pumps shall be suitable for solo as well as parallel operation.<br />
The pump duty point shall be considered at the individual pump flow of the<br />
combined station flow by 2 pumps working at lowest water level 1562.00m of the<br />
reservoir which shall lie at 0.5m above the C/L of inlet port to be fixed at<br />
1562.50m. However the pumps shall be suitable for continuous operation both solo<br />
and 2 pumps in parallel mode at the above LWL condition and maximum HWL<br />
condition of the reservoir at 1577m and in between.<br />
The intake well cum pump house shall have a provision of installing 3 more vertical<br />
pump sets so as to feed the raw water to the additional Water Treatment Plant to be<br />
constructed adjacent to the present one. The existing rising main of 500mm dia.<br />
shall transport the raw water in the present and future demand. Thus in future, there<br />
shall be an additional pump battery of 3 pump sets having 2 working and 1<br />
standby system to take feed of raw water from the proposed single intake well to<br />
meet both for the present and future demand as stated above.<br />
19.2 Scope of electro-mechanical works.<br />
The Scope of Work covers selection, manufacture, testing at manufacturer’s works,<br />
supply and delivery to store at project site properly packed for transportation on<br />
F.O.R site basis, receiving at store and site including loading and unloading at all<br />
terminal points, safe storage, installation, pre-commissioning activities, trial run,<br />
commissioning, field testing, operation and maintenance for a period of 3 months of<br />
the plant with all associated equipments and ancillaries. All electro-mechanical<br />
components of the pump house including pumps, motor, starters, H.T./L.T. Panel<br />
boards, pipes, valves and specials, overhead crane and trolley etc. shall be under the<br />
scope of this tender. Both suction and delivery valves inside the pump house shall<br />
be butterfly valves with motorized actuator and position indicator. Arrangement of<br />
feeding H.T./L.T., 3 phase A.C. Power supply to the H.T./L.T. Panel Board in the<br />
Pump House shall not however be under the scope of this tender and the same shall<br />
be arranged separately by the employer/owner. Civil construction of the intake well,<br />
pump house and gangway over the reservoir from the bank to the pump house<br />
DTS : Detailed Tender Specification. Page 182