Construction of 3.00 MLD Water Treatment Plant Capacity at Thiruneermalai Quarry in Ward No.31, Zone I Tambaram City Municipal Corporation

INTAKE PUMPING SYSTEM ON FLOATING STEEL PONTOON Providing and fixing commissioning of Centrifugal Pumps (1 Working + 1 Standby) as per IS: 1520-1660, IS-9079, IS: 325 for 200 Cu.m/h with minimum 50 mtrs discharge head on Floating steel Pontoon / barge made from Carbon Steel painted with anticorrosive paints. A. The construction of pontoon shall be based on structural which are in field of Marine structured, Jetties and Boats and the stability calculations would be required. B. Floating steel surface can ensure safety and stability, and its four circular arc and obtuse angle shaped corners. The pontoon should be structurally arrangement should be given for boarding and disembarking from the floating pontoon without risk. C. Due arrangement for having it covered seasonal protection. D. The pontoon should be suitably protected from all sides to avoid any damage when it is towed or lifted in the quarry considering the side of Quarry is made of solid Rocks and uneven surfaces. E. The pontoon should also be able to carry minimum 2 to 4 personnel on board safety and with proper boarding and disembarking arrangements. G. The mechanical construction of pontoon should be designed to have installation of minimum two numbers of horizontal centrifugal pump each of 200 cum/hr @ minimum 50 mtrs head Approx KW rating of motors is 30 KW in 3 MLD Plant. These pump shall draw the water from the quarry with minimum suction lift (NPSH) on-going basis for minimum 20 hrs in a day. The pump dimension shall be pprox.. 800 mm x 1200 mm – Qty 2 nos and weight of each pump shall be under 100 kgs each. Pontoon will have 2 nos. Of Centrifugal pump one working & one standby. H. The water entering below the pontoon for lift by the pumps should pass through suitable trash screen of wedge wire so the Debris/ Plants etc do not get lifted along with water. Suitable wedge wire screens should be installed so that pumps work in fail safe designing.

AUTOMATIC SELF-CLEANING FILTER Providing and fixing commissioning of active media filter vessel battery for 125 Cu.m/h flow rate as under specification; Vessel Specification: MOC: Carbon steel IS 2062, Type: Down flow, Max. Filtration Velocity: <12 m/hr per vessel, Backwash Flow: 40 – 45 m3/hr. Internal Diameter: 1200mm, Height on straight: 1500mm, Bed depth: 900mm, Vessel Thickness: As per IS 2825, Max, Pressure drop:0.5 bar, Feed pressure: 2.0 bar, Hydraulic test pressure: 10.0 bar, Media (Type & Depth): a) Bottom Layer Gravel: 150 mm b) Middle Layer Active Media: 450 mm and c) Media Specifications: Active Media Grade:0.4 – 1.0mm, Type: Activated Media, Density: 1.25gm/cm3, Specific Weight: 1250 kg/m3, Roundness: Greater than 0.6, Coeff, Of Uniformity: 1.5 – 1.7, Cross Sectional Ration: 2.4, Specific Gravity: 2.5, Anthracite Media Colour: Black, Bulk Density: 0.8gm/cc Approx., Effective Size: 0.85 -0.95 mm, Hardness: 3.0 – 3.8 (Mohr’s scale) Caustic Solubility: <1.0%, Acid Solubility: <1.0% All vessels must be suitably painted on both internal and external surfaces with high grade industrial quality epoxy paint of min. 100 microns as per the procedure laid out in SSPC. The vessels shall have a nozzle plate type under the drain system having polypropylene mushroom nozzles for treated water collection in the vessel with all lead and lift etc. Complete including Life guarantee with support letter from Original equipments manufacturer from as directed by the engineer in-charge etc., Complete

LAMELLA CLARIFIER: Providing and fixing commissioning of plate type lamella settler system for 200cum/hr. flow rates, along with all necessary accessories such as chemical dosing point, drain valves, Flat Plates, etc. Complete in all respects for adequate performance of system, Flow direction, Bottom flow, Type of Plates; Flat FRP, Deg .of inclination: 55, Tank MOC: MSEP painted with 3 coats of Epoxy paints, Plates MOC: FRP (isophthalic), Flow Distribution Waffles MOC: MSEP, Weirs MOC: MSEP, Nozzles MOC: MSEP, Flash mixer motor 0.5 HP with stainless steel blades and fixing arrangements in Stainless steel 316, with all lead and lift etc. Complete as directed by the engineer in-charge et., complete.

ACTIVE MEDIA FILTERS: Providing and fixing commissioning of active media filter vessel battery for 125 Cu.m/h flow rate as under specification; Vessel Specification: MOC: Carbon steel IS 2062, Type: Down flow, Max. Filtration Velocity: <12 m/hr per vessel, Backwash Flow: 40 – 45 m3/hr. Internal Diameter: 1200mm, Height on straight: 1500mm, Bed depth: 900mm, Vessel Thickness: As per IS 2825, Max, Pressure drop:0.5 bar, Feed pressure: 2.0 bar, Hydraulic test pressure: 10.0 bar, Media (Type & Depth): a) Bottom Layer Gravel: 150 mm b) Middle Layer Active Media: 450 mm and c) Media Specifications: Active Media Grade:0.4 – 1.0mm, Type: Activated Media, Density: 1.25gm/cm3, Specific Weight: 1250 kg/m3, Roundness: Greater than 0.6, Coeff, Of Uniformity: 1.5 – 1.7, Cross Sectional Ration: 2.4, Specific Gravity: 2.5, Anthracite Media Colour: Black, Bulk Density: 0.8gm/cc Approx., Effective Size: 0.85 -0.95 mm, Hardness: 3.0 – 3.8 (Mohr’s scale) Caustic Solubility: <1.0%, Acid Solubility: <1.0% All vessels must be suitably painted on both internal and external surfaces with high grade industrial quality epoxy paint of min. 100 microns as per the procedure laid out in SSPC. The vessels shall have a nozzle plate type under the drain system having polypropylene mushroom nozzles for treated water collection in the vessel with all lead and lift etc. Complete including Life guarantee with support letter from Original equipments manufacturer from as directed by the engineer in-charge etc., Complete

FILTER FEED PUMP: Providing and fixing commissioning of Centrifugal Pump set of 200m3/hr capacity with adequate minimum head of 50m, as per IS:1520-1660, IS-9079, IS:325 for 200 Cu.m/h flow of adequate discharge head as per vendor design and process requirement, along with all necessary accessories such as ELCB, MCB, electrical wiring from MCB to motors, suction and delivery header piping along with necessary flow control valves, check valves etc. Complete in all respect. (100% x 2 nos.) Casing: Cast iron as per IS:210; Back pull out type/double suction/Horizontal split casing, Impeller; CFBM, Impeller Ring: CFBM, Shaft: High Tensile steel –ENB or SS 410, Shaft Sleeve: SS/Bronze, Bearing: Heavy duty Ball/Roller Bearing, Drive Motor: IEC 60034 / IS 12615., Base Plate: Cast Iron, with all lead and lift etc., complete as directed by the engineer in-charge, Impeller shall be made in single piece and shall be securely keyed to the shaft. Measure is to prevent loosening during operation included the rotation in the reverse direction shall be provided. Replaceable shaft sleeves shall be provided the shaft where it passes through the stuffing box. Pump shall be provided with flexible coupling, common base plate shall be provided for pump and motor, Suitable holes shall be provided grouting and theses shall be so located that the base can be grouted in place without disturbing the pump and the motors etc., complete.

3-WAY FLOW CONTROL VALVES: Providing and fixing commissioning of high quality, hydraulically actuated, 3-way flow control valves for flow regulation during filtration & backwashing modes of active media filters, Complete with all necessary accessories such as PU tubing, PU connectors, Victaulic coupling connectors etc. These should be diaphragm actuated, compact 3 port valves. The diaphragm actuator plug assembly keeps the supply port closed while the opening of the backwash port and vice versa. Size: “3 X 3”, Double Chambered type with dynamic seal, Flow Pattern: Angle/Globe, Control Chamber displacement Volume: 0.34 – 1.055 litres, Operating Pressure: 0.7 – 10 bar, Max. Temperature: 65 degrees Celsius, End Connection: Grooved, Material of Construction, Body, Partition Wall & Lower Adaptor: Polyamide 6 – 30GF, Diaphragm: NR-AL52 Nylon fabric reinforced, Seats, Diaphragm Washer: Brass, Plug Washer: Acetal copolymer, Stopper Disc: PVC-U, Spring: Stainless steel AISI 302, Shaft: Stainless steel – AISI 303 Seals, O Rings: NBR, External bolts, studs, nuts & disks: Stainless Steel with all lead and lift etc., complete as directed by the engineer in-charge etc., complete

BACKWASH PUMP Providing and fixing commissioning of Centrifugal Pump set of 65 m3/hr capacity with required head of 25 m, as per IS: 1520-1660, IS-9079, IS: 325for backwashing the active media filter along with all necessary accessories such as ELCB, MCB, electrical wiring from MCB to motors, suction and delivery header piping along with necessary flow control valves, check valves, backwash storage tank in high grade plastic with proper level controller etc. complete in all respect. (100%x 2 nos.), Casing: Cast iron as per IS: 210: Back pull out type/double suction/Horizontal split casing, Impeller: CF8M, Impeller Ring: CF8M, Shaft: High Tensile steel –EN8 or SS 410, Shaft Sleeve: SS/Bronze, Bearings: Heavy duty Ball/Roller Bearing, Drive Motor: IEC 60034 / IS 12615, Base Plate: Cast Iron etc., with all lead and lift etc., complete as directed by the engineer in-charge. Impeller shall be made in single piece and shall be securely keyed to the shaft. Measure is to prevent loosening during operation including the rotation in the reverse direction shall be provided. Replaceable shaft sleeves shall be provided the shaft where it passes through the stuffing box. Pump shall be provided with flexible coupling. Common base plate shall be provided for pump and motor. Suitable holes shall be provided grouting and these shall be so located that the base can be grouted in place without disturbing the pump and the motor etc., complete.

ISOLATION VALVES : 4" Providing and fixing of Butterfly valves for isolation and flow control in Pump Discharge piping manifolds, inlet & outlet of Micro Screen Filter. The isolation valves shall confirm to the following specifications. Size: 4", Valve type: Butterfly, Construction: Wafer type, Design std: API609 CAT A, Testing std: API 598 Pressure rating: PN10, Flange std: ANSI B 16.5 150#, Material of construction, Body: Cast Iron, Disc: Ductile Iron, Seat: EPDM, Shaft: SS 410, Operator: Lever etc., with all lead and lift etc., complete as directed by the engineer etc., complete

ISOLATION VALVES : 3" Providing and fixing of Butterfly valves for isolation and flow control in Pump Discharge piping manifolds, inlet &outlet of Micro Screen Filter. The isolation valves shall confirm to the following specifications. Size: 3", Valve type: Butterfly, Construction: Wafer type, Design std: API609 CAT A, Testing std: API 598 Pressure rating: PN10, Flange std: ANSI B 16.5 150#, Material of Construction Body: Cast Iron, Disc: Ductile Iron, Seat: EPDM, Shaft: SS 410, Operator: Lever etc., with all lead and lift etc., complete as directed by the engineer in-charges etc., complete

NON RETURN VALVES (CHECK VALVES): 4" Providing and fixing commissioning of high quality non return valves (check valves) at feed pump delivery header & outlet of micron Screen Filter. The non-return valves shall confirm to the following specifications: Size: 4", Valves type: Check valve , Construction: Water type, Design std: API 6D, Pressure Rating: PN10 Flange std: ANSI B 16.5 150, Material of Construction Body: Mild Steel, Disc: Carbon Steel, Seat: EPDM Operator: Self etc., with all lead and lift etc., complete as directed by the engineer in-charge etc., complete

AIR AND VACUUM RELEASE VALVES Providing and fixing commissioning of high quality Air &Vacuum Valve so as to discharge air during the filling or charging of the system, and intake air into the system during system drainage. As the system starts to fill, the valve shall function according to the following stages: (i) Entrapped air is released by the valve. (ii) The liquid enters the valve lifting the float and sealing the valve. When internal pressure falls below atmospheric pressure (negative pressure): (i) The float will immediately drop away from the orifice.(ii) Air will intake into the system. The air and vacuum release valves shall confirm to the following specifications. Working pressure range: 0.2 bar–10.0 bar, Testing pressure: 16.0 bar, Working Temperature: 60 degrees Celsius, Material of Construction, Body: High tensile, UV Resistant, Engineering Plastic, Internals: Corrosion resistant with all lead and lift etc., complete as directed by the engineer in-charge including GST and all other charges etc., complete

ONLINE DOSING SYSTEM FOR CHEMICAL DOSING: Providing and fixing commissioning of high quality industrial grade dosing system comprising of dosing pump and chemical storage tanks for adequate dosing of flocculants as well as pre and post chlorination. The chemical dosing pumps:(i)Should have high speed of operation with up to 100 strokes per-minute for high resolution chemical feed, elimination of slug-feed effects.(ii) The liquid end, drive and electronics should be modular in design, enabling economical repair or replacement of parts. (iii) Must be equipped with double check valves to prevent loss of prime and ensure easy self-priming of up to 100 cps viscosity solutions with a 1 m. suction lift. (iv) The diaphragm must be PTFE laminate over EPDM, molded onto a solid core. A retainer plate must be provided to minimize flow rate changes as pressure varies. The dosing pumps for online dosing system shall confirm to the following specifications: Pump Type: Electronic Metering Pumps with Microprocessor Control, Max. Output: 12l/hr Max. Pressure : 5.5 bar, Power: 40 watts minimum, Drive: Electrical power unit, class ‘F’ insulation, Suction Lift:1.0m, Flow regulation: manual, electrical Rating: 230 V AC +/- 10%, Material of Construction Housing: Glass Filled PP, Diaphragm: Flexiprene, Bali: Ceramic, Antisyphon Valve: PVC, Foot Valve: PVC, Foot Valve: PVC Including with all lead and lift etc., with all lead and lift etc., complete as directed by the engineer in-charge etc., Complete.

DIFFERENTIAL PRESSURE SWITCH Providing and fixing commissioning of differential pressure switch across the battery of active media filter for sensing drop in pressure across the filter battery and feedback to control panel. The Differential pressure switch should be an analogue type differential pressure indicator to be used to sense differential pressure build up across the pre filtration and media filtration system, independently. The differential pressure switch must be of heavy duty diaphragm type confirming to the following specifications including with all lead and lifted complete as directed by the engineer in-charge. Differential Pressure Range: 0-50" H2O (0-125 mbar) to 0-30 PSI, Accuracy: ±5% F.S, Max. Working Pressure: 1,000 PSIG (70 bar), Operating Temp. : -40º FTo+200º F (-40ºC to +93ºC), Body Material: Aluminum, Brass, 316/316L, Internal Materials: 316 Stainless Steel, Elastomers : Buna-N (Std), Viton, Neoprene, Ethylene-Propylene, Switch Mounting : Pre-set in Tube, Flat Pack, Din Connector, Process Connections: 1/8" FNPT Bottom Connections etc., complete

SOLENOID COILS Providing and fixing of electrical solenoid coils for hydraulic circuit regulation. The solenoid coil should be a compact 3-Way Latching Solenoid Pilot Valve, comprised of two main components: 1. A dry solenoid actuator and 2. A 3-way hydraulic pilot valve. The actuator is neutralized from water damages by an isolating membrane, which hermetically isolates it from the water. The coil should consume power only when switching positions, using a very short electric impulse. The hydraulic base should feature a manual override and consist of a bracket for attaching to the valve or to a solenoid manifold. The solenoid coil shall confirm to the following specifications: Operating Pressure Range: 0-10 bar, Base Port: 1/8” NPT, Base Orifice Diameter: 2.2 mm Base Flow Factor: a) Pressure port Kv = 0.12 m3/h @ 1 bar ΔP; Cv = 0.14 GPM @1 psi ΔP b) Exhaust port Kv =0.14 m3/h @ 1 bar ΔP; Cv = 0.16 GPM @1 psi ΔP, Actuator Casing: Nylon, Seals and Isolating, Membrane: NBR, Wetted parts: Nylon, Base: Nylon, Voltage Range: 12-50 VDC, Coil Resistance: 4.2 Ω Pulse Width: 20-100 m Sec, Required Capacitor: 4700µF, Operation Modes (electrical connections): a) + Red & - Black: Solenoid vents b) + Black & - Red: Solenoid pressurizes etc., with all lead and lift etc., complete as directed by the engineer in-charge etc., Complete.

PRESSURE GAUGE Providing commissioning of high quality, industrial grade pressure gauges at various locations for measurement of pressure. The pressure gauge shall be filled with glycerin for adequate dampening. Dial Size: 6”, Range: 0–10 bar, etc., with all lead and lift etc., complete as directed by the engineer in-charge etc., complete

FLOW METER Water meter shall be of electromagnetic type with transmitter capable of measuring very low flows precisely with no sensitivity to vibrations, humidity and other working conditions. DATA SHEET, Size As per vendor, Type Electromagnetic with transmitter, Min. operating flow 0cu.m/h, Max. Operating flow Plant Rated Flow, Wetted materials Liner: PTFE; Polyurethane; Hard rubber, Electrodes: .4435 (316L); Alloy C22, 2.4602 (UNS N06022), Transmitter 2‐line display with push buttons, Outputs 4‐20 mA HART, Max. working pressure 16 bar, Connection Flanged ANSI 16.5 B etc., complete

CONTROL SYSTEM Providing commissioning of PLC based control panel for controlling Filtration and Backwashing sequence of Media Filters (12 vessel for 3 MLD). The Panel shall comprise of PLC, HMI Screen, inbuilt transformer, contactors, relay, safety fuses etc., complete in all respects to work on single phase 230 VAC and step it down to 24 VDC which is the required control voltage. The panel should be programmable with focus on ease of use, for changing flushing frequency, flushing duration, DP values, dwell times, master valve control etc. The panel shall be made of high quality weather resistant enclosure. The panel shall be connected with adequate lengths of high quality 1.5 sq. mm copper control cables to the external instrumentation such as DP switch & Solenoid coil. including with all lead and lift etc., complete as directed by the engineer in-charge etc., complete

ELECTRICAL PANEL Electrical Panel for 3 MLD plant with current transformer panel with cable from transformer to CT panel of 180 sq mm., all control panel for feeder pumps with VFD control for 30 HP with change over switch armored cable of 3.5 core, Electric control for VFD panels of Pontoons for 2 nos of 40hp with change over switch, cable of Aluminum 3 core minimum 95 sq mm cables for 2 nos. Pontoon, Star delta starter panel for Backwash pumps, internal lighting panel for filter house, dosing pumps panels with individual MCB, active media filter source panel, micro screen filter source panel, UV source panel etc. complete with all cables and signal cables with display of load factor, pump consumption, Maintenance free Earthing pits minimum 4 nos as required by site conditions with copper bonded rods and non-leaching ground Enhancement, material, etc. complete.

UV SYSTEM :Hydro-optic ultrasonic (UV) treatment systems supplied should be flange type connecting online should have a quartz pipe in which disinfection occurs and the chamber should have a cleaning system. Disinfection Flow rate (per system): 200 m3/h per system total UVT: @ 254 nm cm-1, Minimum Dose: NA Legionella pneumoph, Escherichia coli, Iron bacteria, SRB (Sulphate reducing bacteria) >6 log reduction (99.9999%), >6log reduction (99.9999%), >4 log reduction (99.99%),>1.2 log reduction (94%) Technical Specs: UV lamp type: Bidder to state, No. of lamps (total): Max. operating pressure: 10 bar Water operating temperature: Up to 160°F (during hot water sanitation system needs to be shut down) End connections: Flanged, Control and Electricity: Electrical requirements: 400-480 VAC, 3-phase for the Main Cabinet, 220 VAC, 1-phase for the Controller, Maximum power consumption: Bidder to state Electrical and communication cable length: 15 meters, System Control: B & W Color Controller Touch Screen Construction Materials: Housing: St. St. 316, Internals: High grade fused silica (Quartz), Seals: EPDM & Viton, Sealing grade: IP56 with OCPD modules and Regulatory compliance of product (1) U.S Federal performance standards 40CFR, (2) All components have CE or UL508NRTL (MET) certification. (3) The product should be ISO 9001: 2008, Quality management standard development, design, production and sales of water disinfection system with clean in place (CIP) system for periodic cleaning of UV with 3 phase pressure dosing pump of minimum 17 lit/hr. with 6 kg pressure including necessary tanks for CIP etc., Complete

AIR BLOWER Supply, delivery, and commissioning of Air Blower of capacity 32 m³/hr and discharge head of 180 meters, suitable for continuous-duty operation in a water/wastewater treatment plant. The blower shall be of single-stage ring blower type, with a motor power of 3 Kw, operating at 415 V ±10%, 3 Phase, 50 Hz, and shall be air-cooled, base frame mounted. The material of construction for the casing and impeller shall be aluminium alloy, with deep groove sealed ball bearings, low noise level (<75 Db at 1 meter), and suitable for ambient temperatures ranging from 0°C to 50°C. The blower shall come with standard accessories including inlet filter/silencer, discharge silencer, vibration isolators, base frame, and foundation bolts. The motor shall be TEFC, IP55 protection, Class F insulation, and designed for continuous (S1) duty. Equipment shall conform to IS/IEC 60034, manufactured under ISO 9001 certified processes, and preferably CE marked.

TREATED WATER COLLECTION SUMP The treated water collection sump shall be constructed using Reinforced Cement Concrete (RCC) and designed to hold a total capacity of 1,50,000 litres. It will serve as the final collection point for treated water coming from the water treatment plant before it is pumped for distribution or storage. The RCC construction ensures structural stability, durability, and resistance to leakage. The sump will be equipped with appropriate inlet, outlet, drain, and overflow provisions, along with access manholes for inspection and maintenance. Proper ventilation and safety features will also be incorporated to ensure hygienic and safe operation.

FILTER HOUSE & EQUILISING TANKS The filter house shall be structural designed and suitable to accommodate 3MLD plant with in-house tanks for storage capacity of 60 minutes, Toilet block, Electrical room, storage room, Cascade Aerator for 200 cum/hr, Flash mixer clean water tank after lamella filter with minimum construction area of 260 sqm. Construction of suitable foundation & building with brick wall for active media filter battery, Micro Screen Filter including earth work excavation in all soils , providing and laying PCC of M-10 and raft of M-20 grade. Truss shed for layout as per site condition) minimum height of 5 mtrs from the Finished floor level consisting of Pre-coated sheets of minimum 0.47 mm thickness. Necessary illumination points inside of 5 LED lights 50 Watts, 2nos wall mounted fans and outside Six MV/SV lamps of 50 watts, with extra power points 1 mtr. Wide projection on all sides to protect the plant from Rain & Sunlight etc., complete.

WATER PIPING FILTER PONTOON TO FILTRATION PLANT: Providing and fixing commissioning of interconnecting piping 4" along with suitable flanges & counter flanges of ANSI B16.5 #150 class along with necessary nuts, bolts and gaskets, complete in all respects. The water piping shall be sized for a maximum velocity of 2.8m/s and pressure drop limited to 4m WC per 100mequivalent length. However, gravity lines and pumps suction line, shall be sized for a maximum velocity of 1.5 m/s. All piping, fitting and accessories shall be designed to withstand the maximum pressure in the corresponding line that may occur in the system under normal condition any exigencies. Pipes MOC: MS Tube Heavy Class-C ERW I.S. 1239/1964, Joints & Flanges: Screwed Unions, Slip on flanges, Sealing Material: Non-Hardening Lubricant, 3mm, 3-ply, Rubber insertion. All piping shall be black steel unless otherwise stated and from standard manufactures. Pipes shall be given one primary coat of red oxide paint before being installed except for insulted pipes. Pipe shall be sloping towards drain points. Fittings shall be new and from standard manufactures. Fittings shall be of malleable casting and of pressure ratings suitable for the piping system. Fittings used on welded piping shall be of the weld able type. Flanges shall be new and from standard manufacturers. Supply of flanges shall include bolts, washers etc. as require. Use of flanges made from plates will not be permitted. All pipes and fittings, valves, flanges etc. shall conform to piping element specification MSD – Tee-off connections shall be through reducing tees upto 150mm, otherwise ferules welded to the main pipe shall be used. Drilling and tapping of the walls of the main pipes, shall be through unions/ screwed flange upto 50mm dia and welded flanges for large diameters. All welding shall be done by qualified (I.T.I – 6GR Grade) welders and shall strictly conform to BIS code of practice for manual metallic welding of mild steel. All weld joints shall be

OVERHEAD TANK FEED PUMP Supply, delivery, and commissioning of 1 No. Overhead Tank Feed Pump with a capacity of 200 m³/hr and a total dynamic head of 3000 meters, suitable for continuous-duty operation in a water supply system. The pump shall be a centrifugal horizontal split casing type or multistage construction (as per duty head), dynamically balanced for vibration-free operation. The casing shall be Cast Iron FG260, the impeller shall be of stainless steel CF8M, and the shaft and sleeve shall be stainless steel SS410, ensuring corrosion and wear resistance. The pump shall be coupled with a TEFC squirrel cage induction motor rated at 75 Kw, operating at 415 V ±10%, 3 Phase, 50 Hz, with IP55 protection, Class F insulation, and designed for S1 duty. The pump shall be complete with base frame, coupling, coupling guard, foundation bolts, suction and delivery nozzles, and necessary accessories. The equipment shall be manufactured under ISO 9001 certified processes and conform to relevant IS/IEC standards.

SUBMERSIBLE PUMP FOR SUMP CLEANING The sump cleaning pump shall be of submersible type with a flow capacity of 20 m³/hr and a total dynamic head of 3 meters. One number of pump is proposed for efficient removal of settled sludge or accumulated water from the sump. The submersible design ensures easy installation, low maintenance, and reliable operation in submerged conditions, making it suitable for continuous and intermittent cleaning operations within the treatment facility. UNDERGROUND PIPING FROM PLANT TO GROUND LEVEL RESERVOIRS AT UYILLIAMMAN KOIL STREET (DISTANCE OF 3 KMS FROM PLANT) The treated water will be supplied to the overhead tank(OHT) and ground level reservoirs(GLRs).This ensures storage and distrubution of clean water to the community

HIGH DENSITY POLYETHYLENE (HDPE) PIPE HDPE pipes of 4" diameter, shall be manufactured from poly ethylene: PE 63, PE 80 and PE 100 conforming to IS 4984:2016, the raw HDPE material is heated to a semi-molten state during an extrusion process, corrosion resistance.These HDPE pipes are suitable for underground water supply distribution systems, rural water supply, irrigation (though irrigation might be covered by other standards) as they offer flexibility, corrosion resistance, long life. Wall thickness and dimensional tolerances are specified in tables depending on nominal diameter, PN rating and material grade. For maximum pressure and wall thickness preferred hdpe

TEE PE100 or PE80 grade High-Density Polyethylene are joined by heating & fusing the ends tees are made. HDPE Tee is a three-way pipe fitting used to split or combine the flow of fluids in a piping system.Tee shall be heavy-duty type conforming to IS: 8360 standards, providing a secure and leak-proof connection between different lengths of HDPE pipe. To divert the flow to a new direction while maintaining efficiency.All three outlets have the same diameter. High impact strength and flexibility.

BEND HDPE elbows are manufactured from PE 63 / PE 80 / PE 100 HDPE granules. Hdpe elbows used for underground piping shall be 90° or 45° bends, heavy-duty, can be moulded by injection moulding or fabricated by butt fusion technique type as per IS:8360,For underground placement, elbows shall be externally coated with bitumen and wrapped for enhanced protection, and securely joined to adjoining pipes to accommodate directional changes without leakage.

FLANGES WITH BOLTS & NUTS Flanged joints shall consist of mild steel GI flanges conforming to IS: 6392 or ANSI B16.5, with hot-dip galvanizing as per IS: 4736, securely welded or screwed to the pipe ends. Each flange shall be bolted using galvanized high-tensile bolts and nuts of grade 8.8 or equivalent, ensuring a tight and durable joint. All bolted connections shall include washers, and the entire assembly shall be externally coated with bitumen and wrapped to protect against corrosion in underground installations.

GATE VALVE The gate valve shall be a heavy-duty, resilient-seated type conforming to IS: 14846, suitable for underground water distribution systems. It shall be of full-bore, non-rising spindle design, flanged ends as per IS: 1538/ANSI B16.5, and rated for PN 10 or PN 16 pressure class depending on system head. The valve body, bonnet, and wedge shall be made from ductile iron with fusion-bonded epoxy coating (minimum 250 microns) both internally and externally for corrosion protection. The valve shall operate smoothly under a working flow of 125 m³/hr and withstand high pressures along a 25 km pumping main. A stainless steel stem, brass/bronze stem nut, and replaceable EPDM rubber sealing shall ensure long-term leak-proof performance. The valve shall be manually operated with a hand wheel or gearbox and provided with a surface-level key and chamber for underground installation.

BOOSTER PUMP Supply, delivery, and commissioning of 1 No. Overhead Tank Feed Pump with a capacity of 200 m³/hr and a total dynamic head of 3000 meters, suitable for continuous-duty operation in a water supply system. The pump shall be a centrifugal horizontal split casing type or multistage construction (as per duty head), dynamically balanced for vibration-free operation. The casing shall be Cast Iron FG260, the impeller shall be of stainless steel CF8M, and the shaft and sleeve shall be stainless steel SS410, ensuring corrosion and wear resistance. The pump shall be coupled with a TEFC squirrel cage induction motor rated at 75 Kw, operating at 415 V ±10%, 3 Phase, 50 Hz, with IP55 protection, Class F insulation, and designed for S1 duty. The pump shall be complete with base frame, coupling, coupling guard, foundation bolts, suction and delivery nozzles, and necessary accessories. The equipment shall be manufactured under ISO 9001 certified processes and conform to relevant IS/IEC standards.

ELECTRICAL STARTERS FOR BOOSTER PUMP The electrical starters for the three booster pumps are designed to ensure reliable and safe operation under varying load conditions. Each starter unit is equipped with a DOL (Direct-On-Line) or Star-Delta configuration based on the motor rating, and includes essential components such as contactors, thermal overload relays, circuit breakers, and control wiring to facilitate smooth starting, stopping, and protection of the pump motors. The starters are housed in weatherproof, dust-proof enclosures with IP55 protection class, suitable for outdoor/plant room installations. They feature local/remote control options with necessary indicators, interlocks, and emergency stop functions for operator safety and system integrity.

HGS 55.20.B. Earth work excavating and depositing on bank with initial lead of 10 m & initial lift of 2m in Hard stiff clay, stiff black cotton, hard red earth, shales, murram, gravel, stoney earth and earth mixed with small size boulders SS.20 B

Earth work open excavation by manual means in all soils and sub-soils and to full depth as may be directed except in rock requiring blasting inclusive of shoring shuttering, bailing out water wherever necessary and depositing the excavated earth with a lead of 10 mts. within the compound in places shown by the departmental officers and clearing and levelling the site, etc., complete complying with standard specification and as direct-ed by the departmental officers.

Supplying and filling in foundation and basement with Crushed Stone Sand (M- Sand) in layers of not more than 15cm thick well rammed watered and compacted etc., complete complying with standard specification. The work shall consist of supplying and filling the foundation and basement area with Crushed Stone Sand (M-Sand). Filling shall be done in layers not exceeding 15 cm in compacted thickness. Each layer shall be uniformly spread, watered, rammed, and compacted using suitable mechanical equipment to obtain the required compaction and stability. The work shall be executed in accordance with standard specifications and engineer’s direction.

Plain Cement Concrete 1:5:10(one part of cement, five part of Crushed Stone Sand (M- Sand) and ten parts of coarse aggregates) using 40mm size ISS HBG metal including cost and conveyance of all materials to site and including for the mixing, laying and labour charges and all incidential charges such as water providing etc., complete as per standard specification.

Plain Cement Concrete 1:2:4 (one cement, two Crushed Stone Sand (M- Sand) and four coarse aggregates) using 20mm size ISS HBG metal including cost and conveyance of all materials to site and including for the mixing, laying and labour charges etc., complete as per standard specification

Supply and instalation of 40 KVA Diesel Generator Set with acoustic enclosure conforming to CPCB IV+ Norms and BIS Specifications with AMF Pannel