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

The Bidder shall have to submit along with the technical offer, the pumps H-Q
curve, the efficiency curve, the NPSHR curve, maximum submergence requirement,
working at the lowest water level condition, Power-Flow characteristic curve, the
pump torque speed curve duly, authenticated by the pump manufacturer.
The copy of the printed pump family curve under which the pumps have been
selected, marking there-in the performance curves clearly with indication of the
impeller diameters duly authenticated by the authorised signatory of the pump
manufacture shall also be furnished by the Bidder alongwith the offer. All
curves as stated above should bear the Logo of the pump manufacture. The Bidder
shall also furnish the system head curve at the said conditions duly superimposed on
it, the pump H-Q curves and modified pump H-Q curves for solo and parallel
operation. The detail system head calculations and the station loss calculation
should necessarily be furnished with the offer so as arrive at the Pump TBHs.
The layout of the pump and motor floor etc. as indicated is enclosed with the tender
documents. The left out dimension if there be any in the said layout drawing are to
be incorporated by the Bidder on the drawing along with other details,
e.g. foundation details, thrust bearing details and support etc. as may be necessary.
The static and dynamic loading of the pump motor assy with other allied
components shall be clearly indicated.
19.7 Materials of construction.
The preferred material of construction of the pump are given below. If the Bidder
considers that the M.O.C other than those indicated as preferred M.O.C, will give
better performance and service, he may offer the pumps constructed with his chosen
M.O.C. and the same should be only as an alternative offer backed by technical
justification.
a) Bowl casing : CI as per IS : 210, Grade FG – 200
b) Impeller : SS, CF 8 M
c) Pump shaft, Line shaft and Head shaft : SS 410
d) Sleeves : SS – 410
e) Shaft coupling : SS – 410
f) Bearing (except thrust Brg) : Self lubricated type with cut-less nitrite
rubber in SS shell having provision
(straight groove) for expelling sand,
silicon, mud etc. from them by self
working pressure.
g) Shaft pin, Keys : SS – 410
h) All hardware used in total pump assy
(nuts/bolts/fasteners etc.) : SS – 410
DTS : Detailed Tender Specification. Page 192