annual rate contract for the supply of copper alloy gate, globe and check valves etc. annual rate contract for the supply of copper alloy gate, globe and check valves etc. , isi marked copper alloy screwed end gate valves, ( class-1 ) for water works purposes as per is 778-1984 ( reaffirmed-2010 ) incorporating amendment 1, 2 & 3 of size 15 mm , -do- of size 20 mm , -do- of size 25 mm , -do- of size 32 mm , -do- of size 40 mm , -do- of size 50 mm , -do- of size 65 mm , -do- of size 80 mm , -do- of size 100 mm , isi marked copper alloy screwed end gate valves, ( class-2 ) for water works purposes as per is 778-1984 ( reaffirmed-2010 ) incorporating amendment 1, 2 & 3 of size 15 mm , -do- of size 20 mm , -do- of size 25 mm , -do- of size 32 mm , -do- of size 40 mm , -do- of size 50 mm , -do- of size 65 mm , -do- of size 80 mm , -do- of size 100 mm , isi marked copper alloy screwed end globe valves, ( class-i ) for water works purposes as per is 778-1984 ( reaffirmed-2010 ) incorporating amendment 1, 2 & 3 of size 15 mm dia. , -do- of size 20 mm , -do- of size 25 mm , -do- of size 32 mm , -do- of size 40 mm , -do- of size 50 mm , -do- of size 65 mm , -do- of size 80 mm , -do- of size 100 mm , isi marked copper alloy screwed end globe valves, ( class-2 ) for water works purposes as per is 778-1984 ( reaffirmed-2010 ) incorporating amendment 1, 2 & 3 of size 15 mm dia. , -do- of size 20 mm , -do- of size 25 mm , -do- of size 32 mm , -do- of size 40 mm , -do- of size 50 mm , -do- of size 65 mm , -do- of size 80 mm , -do- of size 100 mm , isi marked copper alloy screwed end check valves, ( class-i ) for water works purposes as per is 778-1984 in ( reaffirmed-2010 ) incorporating amendment 1, 2 & 3 in swing type horizontal type of size 15 mm dia. , -do- of size 20 mm , -do- of size 25 mm , -do- of size 32 mm , -do- of size 40 mm , -do- of size 50 mm , -do- of size 65 mm , -do- of size 80 mm , -do- of size 100 mm , isi marked copper alloy screwed end check valves, ( class-i ) for water works purposes as per is 778-1984 in ( reaffirmed-2010 ) incorporating amendment 1, 2 & 3 in lift type of size 15 mm dia. , -do- of size 20 mm , -do- of size 25 mm , -do- of size 32 mm , -do- of size 40 mm , -do- of size 50 mm , -do- of size 65 mm , -do- of size 80 mm , -do- of size 100 mm , isi marked copper alloy screwed end check valves, ( class-2 ) for water works purposes as per is 778-1984 ( reaffirmed-2010 ) incorporating amendment 1, 2 & 3 in swing type horizontal type of size 15 mm dia. , -do- of size 20 mm , -do- of size 25 mm , -do- of size 32 mm , -do- of size 40 mm , -do- of size 50 mm , -do- of size 65 mm , -do- of size 80 mm , -do- of size 100 mm , isi marked copper alloy screwed end check valves, ( class-2 ) for water works purposes as per is 778-1984 ( reaffirmed-2010 ) incorporating amendment 1, 2 & 3 in lift type of size 15 mm dia. , -do- of size 20 mm , -do- of size 25 mm , -do- of size 32 mm , -do- of size 40 mm , -do- of size 50 mm , -do- of size 65 mm , -do- of size 80 mm , -do- of size 100 mm