Borewell & Tubewell Works Tenders

Construction of production well including scientific source finding through consolidated and unconsolidated rock with down the ODEX drilling rig with PVC, GI, MS pipe and installation of submersible pump set with all accessories. Labour for drilling a perfectly vertical bore hole of specified dia for a specified depth below ground level through consolidated and unconsolidated rock with combination drilling rig as required to suit the site condition as per the direction of Engineer-in-charge including supply of own rig with its accessories, tools and plant and consumables etc. for lowering of 200mm /150mm dia M.S. Pipe / PVC casing fitted with socket and with or without well screen as per the necessity for sub-medium hard and boulder formation (M.S./PVC casing pipe if required to prevent collapse of over burden is to be provided by contractor including lowering and withdrawing after completion of the tube well) 200mm dia x 400mm dia in over burden position inlcluding packing of gravel supplied by Contractor for 400mm bore only etc as per direction of Engineer incharge. Drilling for 200mm dia bore 00mtr to 20 mtr

Supply and installation of solar submersible pump set in tube well/stream/river for clear and cold fresh water as per IS8034 of 1989 with latest amendment. The control panel shall be designed for operation of both solar and grid supply. The control panel shall be completed with inherently under voltage and over load protection. The complete job including all civil and mechanical work and all short of carriage to make system functional as per the direction of site Engineer. AC/DC solar Submersible pump permanent magnet mortar with 92% efficiency & Combined efficiency not less than 67%. The controller must have 1P54 protection with RMS system with live real time GEO location and should be able to send pump data to the cloud. The PV module should be bifacial mona perc 454Wpas per MNRE guidelines. Multistage Pump of minimum 22 stages. Pump should be of SS 304 made with impeller also as per AISI 304. Pump Speed should not be less than 3000 RPM and shall be suitable for permissible sand content. Curve Tolerance: ISO 9906: 201233. : The Motor should have 92% Efficiency and should be fully SS with quality certification of EN 14301, AISI 304. 1.The control panel shall be fully automatic push button operated for motor. (One complete Job). The controller shall be as per IP54 protection with Live GEO tagging and pump data to be shared on cloud in from secured data. 1. Maximum Power Point Tracker (MPPT) shall be included to optimally use of power available from the SPV array and maximize the water discharge. 2. The SPV Controller must be IP 54 Protection or shall be housed in a cabinet having at least IP Protection & have a Angle iron shed of Size (6'x6'x7') of MS sheet of 3mm thick welded on angle iron Size 40x40x4 mm including priming & painting ,also embeded in the ground complete job. 3. Adequate Protections shall be provided in the SPV Controller to protect the Solar Powered Pump set against the following: Dry running Open Circuit Accidental output short circuit Under voltage Reverse polarity SPD to arrest high current surge A good reliable DC Circuit Breaker as per IS/IEC 60947-2 suitable for switching DC Power ON and OFF shall be provided in the SPV Controller All Cables should be as per IS 694.

Construction of tube well after completion of drilling by rotary /percussion method & upto 100 mtr. depth in all type of rocks by DTH system as per IS:2800 Part 1: 1991 and IS:2800 Part II: 1979 (both amended upto date) and technical specifications. The work shall be deemed completed only after obtaining sand free water. The bore well should have a throughout nominal size bore beyond casing pipe. Nominal bore 150 mm dia. (P 2.3.1)

Repairing of borewell components

Development of tube well in accordance with IS : 2800 (part I) and IS: 11189, to establish maximum rate of usable water yield without sand content (beyond permissible limit), with required capacity air compressor, running the compressor for required time till well is fully developed, measuring yield of well by "V" notch method or any other approved method, measuring static level & draw down etc. by step draw down method, collecting water samples & getting tested in approved laboratory, i/c disinfection of tube well, all complete, including hire & labour charges of air compressor, tools & accessories etc., all as per requirement and direction of Engineer-in-charge.