MM/C/TUBE WELL/15th FC/2583/2025-26 Sl 01

Development & Surging Operation of Bigger Dia Tube Well inside Hospital OHR and repairing of Existing 20 H.P Submersible Pump.

a) Surging & development of Big dia tube well (300 mm X 200 mm X 150 mtrs [depth approx ], Method of Construction - Reverse Rotary Drilling System) by carrying out surging & back blowing by suitable air compressor (not less than 350 cfm / 150 psi capacity) for minimum 12 hrs. Including lowering of suitable dia eduction pipe, air line pipe etc. upto required depth as per direction of Engineer-in-charge including hire & transport charge of Air compressor & other necessary tool & plants & also cost of fuel/ lubricants for air compressor

b) Supply of acid component including all taxes & carrying cost at site. Sodium Hexameta Phosphate / Calcium Hypochlorite / Sulphamic Acid

c) Labour Charges for pouring the acid in requisite quantities in requisite quantities in perforated polythene one cloth bag & submersing the bag within the tube well at different stages of strainer with the help of string overnight, weeping & their mixing & string the acid with surge block by air compressor(including back pressure etc. all complete).

d) Bacteriological Testing & Chemical Testing (Fluoride & Arsenic) of Tube Well after completion of surging work.

Withdrawal of electro motor submersible pumping set From within the Tube wella) Withdrawal of electro motor submersible pumping set of following capacities from within the tube well housing pipe of the following length by using all necessary requisites tools and plants and carefully as per direction of Engineer-in-Charge and stacking the same properly at site within the tube well premises complete.i) 100/150/200 cubic metre per hour capacity electro motor pumping set.i) Length of pump assembly of any length exceeding 18 metre length.

Installation of electro motor submersible pumping set within the Tube wella) Installation of submersible electro motor pumping set of following capacities by using necessary requisite tools & plants by lowering the same within the tube well housing pipe up to the following depth as per direction by fitting, fixing column pipes and other accessories, fixtures with necessary nuts, bolts & washers & suspending the entire assembly of pump set vertically by fixing the same supported by M.S clamps over the top of housing pipe, binding the motor cable with each column pipes & drawing cable upto pump controller/ starter point including opening out of the top cap of housing pipe of the tubewell & testing of motor both in loading as well as in unloaded condition before & after installation of the same (The rate is inclusive of hire charges of tools & plants) i) 100/150/200 cubic metre per hour capacity electro motor pumping set.ii) Length of pump assembly of any length exceeding 18 metre length.

Dismantling Submersible Pump/Bowl assembly For necessary over hauling / servicing /repairingDismantling Submersible Pump/Bowl assembly suitable for a capacity of 30/150/200 Cum per hour capacity against a total head of 15 mtrs to 30 mtrs of different make and segregating all spares fitted with the pump including washing and cleaning the same thoroughly for verification of serviceable and unserviceable spares as per direction of the Engineer-in-Charge.

a) For Pump for 12 H.P Motor and Above Size.

i) Repairing of stage bowl and other spares when necessary by welding turning and rethreading including supplying and fitting, fixing new studs nuts, washers, impeller key, coupling key with lock nut complete as per direction of Engineer-in-Charge.

ii) Repairing impeller by metallic gas/electric welding with gunmetal stick & turning, fitting, fixing in proper position as per direction of Engineer-in-Charge.

iii) Supplying, fitting, fixing stainless steel shaft as per sample & approval of the Engineer-in-Charge.

iv) Supplying, fitting & fixing G.M sleeve to be fitted in the bowl bush/body bush suitable for specified R.P.M.

v) Supplying, fitting & fixing the body (Bowl) Bush (suitable for specified R.P.M of pump (Motor set) as per direction of the Engineer-in-Charge (Two nos).

vi Supplying, fitting & fixing stainless steel pump coupling as per sample

vii) Supplying, fitting & fixing steel sleeves with 2 Nos S.S Nut as per site & sample (two nos)

viii) Supplying, fitting & fixing ceramic filter with circlip & rubber guarder (original of a particular make of pump).

ix) Supplying, fitting & fixing Impeller seal ring made of phosphorous.

x) Supplying, fitting & fixing sand guard made of Gun Metal as per direction of the Engineer-in-Charge.

xi) Charges for repairing continuity test, insulation test by Megger, no load test as per direction of Engineer-in-Charge.

b) Labour charges for re-assembling the submersible pump after completion of repairing spare etc. & allied works with repaired spares or new spares when necessary to be supplied departmentally which are not provided in schedule including screws, nuts, lubricating materials etc. As required as per direction of E.I.C.

c) Painting 2(two) coats of both inner & outer portion of submersible pump with best quality synthetic enamel paint of approved make & brand including smoothening surface by sand papering after removal of old paint