PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

5. a) Centre to centre spacing (between 2 adjacent
pumps)
b) Inner diameter of the R.W. intake well : 10000 mm
: Shall be limited to 1500mm
c) Pump house size over the deck : 12000mm x 12000 mm
6. Pump column pipe & discharge header pipe : Minimum 300mm &
350mm
7. Relative humidity at site : 100% (Max.)
8. Average maximum ambient temperature : 25° C
9. Environment of operation : Dust free/non hazardous
10.
Floor cut out for pump suspension lower tier of
the pump deck
: Shall be kept as required
(for present and future – 2x
3nos.)
11. Delivery pipe/cable trench : Shall be kept in the floor of
pump house with chequered
plate.
Bidder shall submit with the technical offer, the details of calculation so as to arrive
at the total head of the pumps. The pump characteristic curves, the solo and or
parallel operation curves of the pumps superimposed with the system head curves
etc. as mentioned in the technical specifications of the pumps shall have to be
furnished with the offer.
The curves, drawings etc. shall be in English Version and shall contain the Logo of
the respective Pump manufacturer duly signed by the authorised signatory of the
same. The curves shall comprise the following: (i) Discharge, (ii) Head, NPSH,
minimum submergence, (iii) Power (KW), (iv) Efficiency (%). In absence of such
information, curves, drawings of the Bidders may be considered as technically
invalid and rejected.
19.5 Technical specification of the vertical wet pit type pumps.
Codes and Standards : The design, material, construction, manufacture,
inspection, testing and performance requirement of vertical pumps shall comply
with all applicable codes and standards:
IS – 1710 : Vertical turbine pumps for clear, cold, fresh water
IS – 5120 Technical requirements – Roto dynamic special purpose pumps
IS – 9137 : Code of acceptance for centrifugal, mixed flow and axial flow pumps class “C”
DTS : Detailed Tender Specification. Page 187