Replacement of filter bed sand and sluice valves at 0.55 MGD Surface water treatment plant under DWS Sub-Division Ambassa

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. Qty- 2x4.6x4.6x0.6=25.39 cum

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) 150 mm dia (PN-1.6)

ii) 200 mm dia (PN-1.6)

iii) 300 mm dia (PN-1.6)

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

i) 200 mm nominal bore