maintenance and repair to barshi kurduwadi water supply scheme dismantling damaged 150 mm dia sluice valve and providing , fixing 150 mm dia tamper proof air valve without isolating sluice valve at kandar to barshi . , item no . 1 :- providing and supplying at site ductile iron/spheroidal graphite ( s . g . ) iron single / double chamber tamper proof air valve without isolating sluice vlave . valves in accordance with bsen 1074-4 of pn 10/16 rated , with body and bonnet of ductile iron confriming on epdm rubber ( suitable for drinking water ) , internal fasteners of stainless steel a2 . body & bonnet coated inside & outside with electrostatically applied epoxy powder coated blue colour ( suitable for drinking water ) as per din 30677-2 &gsk guidelines with coating thickness of min . 250 microns . flanges connections as per is 1538 raised face & pressure testing at manufactures work shall be done as per is 18456 including transportation charges excluding gst levied by goi & gom in all respect etc complete . ( for pn 10 & 16 ) , 150 mm dia ( 40647 x 18%gst = 47995 ) ( mjp csr 19-20 page no . 180 i . no . a _xv ) , item no . 2 :- lowering , laying and fixing in proper alignment and position all types of c . i . air valves as directed by engineer-in-charge including cost of conveyance from stores to site of work , cost of all material and giving satisfactory hydraulic testing etc complete ( for all class of valves ) , 150 mm dia ( 281691 x 18%gst = 332395 ) ( mjp csr 19-20 page no . 188 i . no . 10_a _xi )