Maintanance of existing Iron Removal Plants of various capacity./SH Running maintenance of IRP attached to the existing DTW schemes during the year 2025-26 under Old Agartala R.D. Block under DWS Sub- Division Jirania

Providing and fixing C.I. sluice valves ( with cap ) complete with bolts, nuts, rubber insertions etc. ( the tail pieces if required will be paid separately ) as per CPWD specification and direction of the Engineer - in - charge.

i) 50 mm dia. A. PN - 1.0

ii) 65 mm dia. A. PN - 1.0

iii) 80 mm dia. A. PN - 1.0

Providing and fixing G.I. pipes of medim class as per IS : 1239 with latest amendment complete with G.I. fittings and clamps, including cutting and making good the walls etc. complete as per CPWD specification and direction of the Engineer - in - charge. A. Internal work - Exposed on wall

i. 15 mm dia. nominal bore

iii. 25 mm dia. nominal bore

Providing & fitting fixing of G.I. flange ( 10 mm wall thickness ) by welding with G.I. / MS pipe and placing position as per specification and the direction of the Engineer-in-charge.

i. 150 mm dia

iv. 80 mm dia

v. 65 mm dia

vi. 50 mm dia

Providing and fitting fixing of brass fullway valve with handle in the GI pipe line including cutting, threading etc. complete as per CPWD specification and direction of the Engineer - in - charge.

i. 15 mm dia

iii. 25 mm dia

Reparing of non-functional air blower of 300m3 / hr. capacity by dismantling, replacement of damaged parts, oiling, greasing & reassembling, realiegnment of mtc pulley, motor pulley etc. to make the blower functional as per direction of the Engineer-in-charge.

Reparing of non-functional air compressor of 10.0 to 20.0 cfm capacity by dismantling, replacement of damaged parts, oiling, greasing & reassembling, realiegnment of mtc pulley, motor pulley etc. to make the compressor functional as per direction of the Engineer-in-charge.

providing and fitting fixing diaphragm valve washer of approved quality as per direction of the Engineer-in-charge.

i. 150 mm dia

ii. 80/100 mm dia

Providing and fitting fixing diaphragm valve MS spindle of approved quality as per direction of the Engineer-in-charge.

i. 150 mm dia

ii. 80/100 mm dia

Providing and fixing C.I. non-return valve of approved quality as per CPWD specification and direction of the Engineer - in - charge.

i. 50 mm nominal bore

Providing and fixing bal valve(brass) of approved quality complete.

i. 25 mm dia

Providing and fitting fixing MS Foot valve as per relevant IS specification and the direction of the Engineer-in-charge.

i) 80 mm dia

ii) 100 mm dia

Providing and fitting fixing Cl plate NR valve of having 200 CSM capacity on (blower line of package type iron removal plant of approved quality as per direction of the Engineer-in-charge.

Providing and fitting fixing direct online type motor starter AC3, 415 V, 50 Hz, 3ph) 7.1 HP/5.5 kw relay range 11-18 Amps in steel sheet enclosures of L & T make cat No. MK. DOLSS96211 suitable for 5.00 HP motor of compressor/ blower as per direction of the engineer-in-charge.

Providing and fitting fixing direct online type motor starter AC3, 415 V, 50 Hz, 3ph) 7.1 HP/5.5 kw relay range 9-15 Amps catalog no.SS97210 in steel sheet enclosures of L & T make cat No. MK DOLSS96211 suitable for metering pump as per direction of the engineer-in-charge.

Painting with synthetic enamel paint of approved brand and manufacture to give an even shade [Payment shall be made after submission of Test Certificate issued by the Manufacturer]:

Two or more coats on new work

Applying priming coat [Payment shall be made after submission of Test Certificate issued by the Manufacturer] :With ready mixed red oxide zinc chromate primer of approved brand and manufacture on steel work (second coat )

Painting with black anticorrosive bitumastic paint ( one or more coats ) of approved brand and manufacture on old work to give an even shade including preparationof surface as required complete as per direction of the Engineer in charge.

Providing and fixing hard drawn steel wire fabric of size 75 x25 mm mesh or other suitable size wire mesh to be fixed & firmly anchored to the concrete surface by means of "L" shaped mild steel shear key welded with existing reinforcement including the cost of materials, labour, tool & plants, as required and as per direction of the Engineer-in-charge.

Providing corrugated G.S. sheet roofing including vertical/curved surface fixed with polymer coated J or L hooks, bolts and nuts 8 mm diameter with bitumen and G.I. limpet washers or with G.I. limpet washers filled with white lead and including a coat of approved steel primer and two coats of approved paint on overlapping of sheets complete (up to any pitch in horizontal/ vertical or curved surfaces) excluding the cost of purlins, rafters and trusses and including cutting to size and shape wherever required.

i) 0.63 mm thick Zinc Coating not less 275 Gm/m2

Steel work in built up tubular (round, square or rectangular hollow tubes etc.) trusses etc., including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer, including welding and bolted with special shaped washers etc. complete.

Hot finished welded type tubes

Providing and laying in position cement concrete of specified grade excluding the cost of centring and shuttering -All work upto plinth level:

1:2:4 ( 1 Cement: 2 fine sand : 4 graded well burnt brick aggregate 20 mm nominal size)

Supplying of wooden table with a drawer to the right side of size 48” X 30” X 30” for DTW Scheme

Supplying of armed plastic chair for DTW Scheme

Providing & fitting, fixing of signboard (Size 1.00 X 0.75m) at water supply scheme in/c cost of 1mm thick plain aluminum or G.I. sheet with necessary MS angle (40 X 40 X 5mm) in/c necessary bending and fixing on the GCI walling of pump house and painting writing nail spikes etc. and carrying to the work site complete as per direction of the Engineer-in-Charge.

Charges for spreading of filter media ( sand and gravel after proper cleaning and washing ) inside the package type IRP as per specification and the direction of the Engineer-in-charge. (excluding the cost of sand and gravel).

Lifting of filter media from package type IRP filter chamber as per specification and the direction of the Engineer-in-charge.

Supplying ISI marked/ Taparia make tools for water scheme.

i) Sly wrenches (12”)

ii) Pipe wrench (14”)

iii) Pliers (8”)

iv) Screw Driver (8”)

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