WBPHE /EE/AMD/NIT 09e / 2020-2021/9

Amount

Multigrade filter-2 Nos

Taken out of old filter media from 2 Nos. Multi-Grade filters units by engaging skilled technician including loading,lifting, unloading, carrying and stacking properly at outside of campus within a distance of 250 mtr. avg. from work site by manual labour and head load.

Removal of old HDPE strainers from 2 nos. M G filter bed plate carefully to avoid any damage of bed plate and under bed draw-off system of MG Filter.

Painting the inside surface of 2 nos. M G Filter Units

Supply delivery of different size gravels for MG Filter as per specification given NIT. (Volume = 0.785*1.4^2*0.4 =0.615)*2 nos. filter = 1.23 m3 say 1.5 m3

Supply delivery of filter sand for M G filters as per IS 8419 (Part-I) (volume = 0.7854 * 1.42^2 * 0.6 * = 0.9236) * 2 nos. filter = 1.847 m3 say 2.0 m3

Supply, delivery, fitting and fixing of HDPE Umbrella type strainers on bed plate.

Packing of MG Filter bed plate with graded gravels and grits carrying from stack yard by manual labour and head load at a distance within 250 mtr. Avg.from filter unit carefully.

Filling the MG Filter bed by newly supplied sand including ramming and leveling the floor of bed.

Re-fitting fixing the manhole cover and dismantled pipe lines of MG filter units in proper position by supplying new gaskets/rubber insertion, with new nuts & bolts etc as necessary maintaining proper alignment.

Painting of outside surfaces of 2 nos. MG filter units and pipe lines.

ACTIVATED CARBON FILTER - QTY- 2 NOS

Taken out of old filter media from 2 nos. activated carbon filters units by engaging skilled technician from approved company including loading, lifting, un-loading, carrying and stacking properly at outside of campus within a distance of 250 mtr. avg. from work site by manual labour and head load.

Removal of old HDPE strainers from 2 nos. AC filter bed plate carefully to avoid any damage of bed plate and under bed draw-off system of MG Filter.

Painting the inside surface of 2 nos. AC Filter Units

Supply delivery of different size gravels for AC filters. (volume = .7854 * 1.42^2* 0.4 = 0.6157) * 2 nos. filter = 1.23 m3 say 1.5 m3

Supply delivery of Activated carbon.(volume = 0.7854 * 1.42^2 * 0.75 =1.1545) * 2 nos. filter = 2.309 m3 say 2.5 m3

Supply delivery and fitting fixing of HDPE Umbrella type strainers for AC filters on bed plate.

Packing of AC Filter bed plates with graded gravels and grits carrying from stack yard by manual labour and head load at a distance within 250 mtr avg. from filter unit carefully.

Filling the AC filter beds by newly supplied activated carbon including ramming and leveling the floor of bed properly and as per technical.

Re-fitting fixing the manhole cover and dismantled pipe lines of AC filter units in proper position by supplying new gaskets/rubber insertion, nuts & bolts etc as necessary maintaining proper alignment.

Painting of outside surfaces of 2 nos. AC filter units and pipe lines

Supply and changing of MS medium grade frontal pipe lines 80 mm dia in place of the existing defunct pipelines with air vent line and 25 mm valves and nuts, bolts, washer and gaskets.

CI Butterfly valves of 80 mm dia.

CONCORD ENGINEERING

B T PROJECTS PRIVATE LIMITED

WEST BENGAL ENGINEERING CO.