m-15 (copper alloy check valves etc.). annual rate contract for the supply of copper alloy 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