Running and maintenance of existing Iron Removal Plant attached to DTW Schemes within the jurisdiction of Raishyabari R.D Block under DWS Sub-Division, Gandacherra. (Gr-II).

abour charge for opening the oxidation chamber & removing the old media etc complete as per direction of Engineer in charge.

Providing and placing rapid gravity filter sand having effective size of 0.50 mm to 1.00 mm & uniformity co-efficient of not more than 1.70 and or less than 1.30 obtained from Barakar river West Bengal as per specification and the direction of the Engineer - in - charge.

Providing and placing filter gravel having effective size of 3.00 mm to 25 mm & uniformity co-efficient of not more than 1.70 and or less than 1.30 obtained from Barakar river, West Bengal as per specification and the direction of the Engineer - in-charge.

Providing and placing of anthracite coal ( 3 mm to 6 mm) of SP gr. 1.4 in IRP as per specification & direction of the Engineer-in-charge.

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

Providing and fitting fixing of poly propylene double hexagonal nut strainers (threaded type) inside the IRP vessel of approved quality as per direction of the Engineer-In-Charge.

Providing and placing of MnO2 (size 20 mm to 40 mm) inside the Oxidation chamber after removing existing old Mn O2 from the chamber as per specification and direction of the Engineer in charge.

Providing & fixing MS bolts in/c nuts & washers complete as per standard up to 300 mm length

labour charges for repairing Air blower,air compressor,strater main switch and electric wireing etc.complete as per specification and the direction of the engineer-in-charge.

Providing and fixing CIDF Butterfly valve with bolts, nuts, rubber insertions etc. complete as per CPWD specification and direction of the Engineer - in - charge. ( The tail pieces, tappers etc if required will be paid separately )

100 mm dia

125 mm dia

150 mm dia

Providing and fixing CI Diaphragm valve of approved quality as per specification and direction of the Engineer - in - charge.

i. 150 mm dia

Painting with black anticorrosive bitumastic paint (one or more coat ) of approved brand & manufacture on old work to give an even shade in/c preperation of surface as required complete as per direction of the Engineer in charge.

Painting with synthatic enamel paint( one or more coat) of approved brand & manufacture on old work to give an even shad in/c preperation of surface as required complete as per direction of the Engineer in charge.

welding by gas or electric plant in/c transportion of plant site etc complere as per standard design.

Supplying of sodium Hypochloride solution to the IRP as per direction of the Engineer incharge.

Supplying & fitting fixing of Alum Dosing metering pump Model No. DTH #2125MD, rated capacity 100LPH with CGL make motor 0.37 kw/.50HP, 4 pole, frame size:71 complete as per specification & direction of the Engineer in charge.

Providing and fitting fixing steel sheet enclosed switch fuse (suitable for DIN fuses), triple pole with Neutral Link (TPN), 415/500 Volt, L & T / Havells / BCH make etc. complete as per direction of the Engineer-in-charge.

ii.63 amps

iii. 100 amps

iv. 200 amps

Providing and fitting fixing of Direct on line (DOL) motor starter L&T/BCH make ( 3 phase, 50 Hz, 10 HP/7.5 kw relay range within 13-21 + 10%) in steel sheet enclosure complete as per direction of the engineer in charge.

Supplying and fitting fixing Kay Rotary Twin Lobe compressor model no. 55 AC having capacity 300 cum/hr and pressure 0.35 kg/sq.cm complete i/c 7.5 Hp motor 1440 rpm of approved quality as per direction of the engineer in charge.

Rewinding of Horizontal Motor suitable for centrifugal pumps by complete dismantling in/c providing & rewinding with Super enamelled copper conductor (as per IS:13730 Part-3) conductor & all necessary spare parts and reassembling the same including servicing of rotor & necessary trial run as per specification and direction of the Engineer in charge. i. 3.0-5.0 HP

Taking out lime stone / graded gravel / filter sand from top slab of sedimentation tank filter bed, through washing by water & placing the whole lime stone / graded gravel / filter sand at original place after washing in IRP as per specification and the direction of the Engineer-in-charge.

Charges for making G.I. Short piece i/c. cutting, threading at both end, fitting, fixing at site etc. as per specification and the direction of the Engineer-in-charge. ( G.I. pipes will be supplied from the department free of cost ).

i. 150 mm dia.

ii. 125 mm dia.

iii. 100 mm dia.

vii. 40 mm dia.

Charges for making G.I. reducer i/c. cutting, welding, threading at both end, fitting, fixing at site etc. as per specification and the direction of the Engineer-in-charge. ( G.I. pipes will be supplied from the department free of cost ).

i. 150 x 125 mm dia.

ii. 150 x 100 mm dia.

iii. 125 x 100 mm dia.

v. 100 x 50 mm dia.

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

ii. 125 mm dia

iii. 100 mm dia

vi. 50 mm dia

Providing and fitting fixing PVC suction hose pipes of wall thickness 6 mm. as per relevant IS specification and direction of Engineer-in-charge.

i. 80 mm dia

ii. 100 mm dia

iii. 125 mm dia

iv. 150 mm dia

v. 200 mm dia

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