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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Though the wall thickness of the pipes for rising main may be sufficient to<br />
withstand very severe surge pressure, the valves in the pump house including the<br />
delivery manifold is required to be properly selected so as to prevent the damage of<br />
the machineries in the event of sudden tripping of pumps as a result of power<br />
failure. In the case of intermediate pumping station, the picture is comparatively<br />
worsen as the total head is comparatively higher. In such a situation, water<br />
hammering would be quite severe in the event of power failure. Considering the<br />
total pump head, the valves inside the pump house including the delivery manifold<br />
should have a working pressure of not less than 1.5 times the working pressure. Non<br />
return valves on the individual pump delivery lines are proposed to be provided<br />
with dash pot arrangement to dampen the rate of closure towards the end of closure.<br />
Air valves are to be provided in the rising main.<br />
Technical specification of the horizontal split casing pump.<br />
Codes and Standards : Has been detailed elsewhere in this document.<br />
Design and Performance Requirement : Has been detailed elsewhere in this<br />
document.<br />
Drawing, data, curves and manuals : Has been detailed elsewhere in this<br />
document.<br />
Materials of construction : Has been detailed elsewhere in this document.<br />
Inspection and Testing : Has been detailed elsewhere in this document.<br />
Packing for Transportation : Has been detailed elsewhere in this document.<br />
Technical specification for the drive motors : Has been detailed elsewhere in this<br />
document.<br />
Design & Operational requirement : Has been detailed elsewhere in this<br />
document.<br />
Detail Particulars : Has been detailed elsewhere in this document.<br />
H.T Power Distribution Panel Board : Has been detailed elsewhere in this<br />
document.<br />
L.T. 415V, Power Distribution Panel Board : Has been detailed elsewhere in this<br />
document.<br />
Motor Control Centre : Has been detailed elsewhere in this document.<br />
DTS : Detailed Tender Specification. Page 275
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