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

The rubber packing shall be three ply and of approved thickness. The packing shall
be of full diameter of the flange, with necessary holes and the sluice valve bore. It
shall be even at both the inner and outer edge. The flange faces shall be thoroughly
greased. If flanges are not free the Contractor shall use thin fibres of lead.
After placing the packing, nuts and bolts shall be inserted and tightened to make the
joint.
The valve shall be tightly closed being installed to prevent any foreign materials
from getting in between the working parts of the valve.
Each flange bolt shall be tightened a little at a time taking care to tighten
diametrically opposite bolts alternately.
The sluice valve shall be installed in such a way that spindle shall remain in truly
vertical position. The other end of the tailpiece shall be fitted with pipes so that
continuous lines can work. Extra excavation necessary to facilitate the lowering
and fixing of sluice valve shall not be paid for.
Testing:
After installation of sluice valve the same is tested to 1 ½ times of its test pressure.
The joints of sluice valve shall with stand the test pressure of pipeline.
Defects noticed during test and operation of sluice valve shall be rectified by the
Contractor at his own cost, without any extra claim, to the entire satisfaction of the
Engineer in charge.
13.2 Fixing of air valves.
General:
The specification placed down requirement for lowering laying and fixing Air
Valves.
GTS : General Technical specification. Page 98