NIT NO. 04, ITEM NO.05 (2025-26)

Isolating the clarified tank from inflowing and out-flowing channel by closing sluice gate to ensure no flow in the clarified tank de-watering the stagnant water with help of sludge submersible pumps and other mechanical means and cleaning the excessive mud and settled sludge from the site manually or by using mechanical T&P as per necessity with proper shuttering camp arrangements for execution the work with all safety measures taken

Dismantling of Central Rotating Mechanism Complete disconnection of all incoming and outgoing electric connections with separation of reduction gear box with motor such as drive head with all damage parts of flocculator carried out from clarifier as per plant in charge.

Lifting of bridge with help of mechanical/Hydraulic jack at center of bridge with tacking all the precaution and rest of the bridge with suitable packing/mechanical supports vertically as well as horizontally across of clarifiers by welding work as required as per site requirement.

Repair of Geo Miller make Drive mechanism clariflocculators comprises of following- CI Base- 690mm OD machine balls 38mm dia. Steel balls be at 600mm PCD, 36 Nos. equally spaced. CI cover for the above will be machined and mounted on the base as per our standard design. Lubrication arrangement will also be provided.

Installation of repaired central mechanism and carriage drive complete set as per drawing with the help of skilled staff, chain pulley, tripod with pasting of sealing arrangement leak prof oil from chamber with cotton & gland and re-installation of reduction gear and motor with all incoming and outgoing connection with oil and greasing complete in all respect.

After reinstallation of (lower & upper) flocculator arms, and scrappers and other allied work balancing of complete flocculation bridge with adjustment of central Tee bolts etc. as per requirement.

Supply and application on paint for painting of complete clarifloculator mechanism: specs- epoxy primer (min 1 coat) following by epoxy finish paint (min. 2 coats), total DFT min. 225 microns, food grade quality, and colour shade as per DJB engineer in charge. For painting of all other components at site: cleaning by wire brush/chemical cleaning (as per requirement) and epoxy painting as per above specifications.

Testing and commission of complete job on no load and on full load as per site requirement including all T&P charges.

defence engineers (india) (BID ID -1583920)