NIT NO. 10 (2022-2023) EE(SDW)VI /ITEM NO.1

Repair/Renovation of air flow system at aeration of 20 MGD STP keshopur:-Arrangement of all required safety equipments (i.e safety belts, folding ladders, safety helmets, safety shoes, face mask, safety goggles, oxygen kit etc.) for safety of man power during execution of work at highly gaseous & toxic area.

Dismantling of 100mm butterfly valve from the existing air flow system at aeration tank after cutting/removing of old rusted nut bolts of all flanges with gas cutter and manual labour. The job includes dismantling of all the valves one by one along with old worn out rubber flexible couplings and respectively shifting them to working platform with all the safety and precautions.

Dismantling of 150mm butterfly valve from the existing air flow system outside the blower house after cutting/removing of old rusted nut bolts of all flanges with gas cutter and manual labour. The job includes dismantling of all the valves one by one and respectively shifting them to working platform with all the safety and precautions.

Refurbishment of 100 mm dia butterfly valve at the workshop after necessary salvazing, refixing of parts, reassembling the same. The job includes repairing of SS disc, replacement of nitrile rubber seal and O ring along with fixing of new SS handle for smooth operation of the valve.

Refurbishment of 150 mm dia butterfly valve at the workshop after necessary salvazing, refixing of parts, reassembling the same. The job includes repairing of SS disc, replacement of nitrile rubber seal and O ring along with fixing of new SS handle for smooth operation of the valve.

Supply of hard rubber threaded flexible coupling of 300 mm length & 125 mm dia along with 02 nos. of SS clamps of required size.

Fixing of hard rubber threaded flexible coupling on the existing air pipe with proper fixing and tightening of SS clamps to avoid any gap and air leakage.

Repairing of cracks/leakages in existing SS pipe with the help of SS welding, fixing of SS sheet etc as per the site requirement to avoid any air leakage.

Fixing of refurbished 100 mm butterfly valve on existing air pipe one by one with all safety measures with the help of manual labour by using new nut bolts and rubber packing, proper tightening of nut bolts to avoid any leakage.

Fixing of refurbished 150 mm butterfly valve on existing air pipe one by one with all safety measures with the help of manual labour by using new nut bolts and rubber packing, proper tightening of nut bolts to avoid any leakage.

Testing & commissioning of the entire air flow system on no pressure and full pressure of the line.

Transportation & cartage charges of men & material.