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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Other acceptable standards like HIS/ISO etc. which may be equivalent and or<br />
superior to those specified above.<br />
Technical requirement of the vertical pumps for the specific system/project shall be<br />
guided by Data Specification sheets attached.<br />
In case of any contradiction between the above standards and data specification<br />
sheet the stipulations in the data sheets prevail and shall be binding on<br />
supplier/contractor.<br />
Design and Performance Requirement.<br />
The pump shall be of vertical wet pit type with mixed flow impeller. The pumps<br />
shall be placed vertically submerged within the intake well and mounted on the<br />
pump floor.<br />
The present pump battery shall contain 3 nos. pump sets of which 2 nos. in parallel<br />
operation shall deliver the required designed flow rate with additional 15% in<br />
excess of the station flow capacity of 8 MLD Water Treatment Plant at all the time<br />
for the present phase.<br />
In future 3 more pump sets shall be installed for additional Water Treatment Plant.<br />
Similar concept shall be followed for the future pump battery.<br />
Each pump battery (both for present and future) shall have separate common header<br />
but common Raw Water Rising Main.<br />
In the present phase, the minimum station flow shall be 480 m 3 /hr (133 lps) of raw<br />
water supply to be shared by 2 pumps working in parallel. The head demand at that<br />
condition shall be assessed by the <strong>Bid</strong>der considering the system stated to be<br />
encountered. The duty point head shall be considered at the declared lowest water<br />
level (LWL) of the Intake well as mentioned earlier. Individual pump TBH shall be<br />
calculated and furnished by the <strong>Bid</strong>der considering the above system.<br />
In future phase also the station flow shall be similar with 2 pumps working in<br />
parallel.<br />
The schedule of operation of pumps in the present phase may call for operation of<br />
single pump/two pumps continuously at all working level of the reservoir i.e. lowest<br />
W.L. Max. HWL and in between. The pumps shall be so selected that all the above<br />
mentioned duties are well within the safe operating zone of the pumps. Respective<br />
head and flow corresponding to the above operating levels shall be evaluated and<br />
furnished by the <strong>Bid</strong>der.<br />
DTS : Detailed Tender Specification. Page 188
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