IS 9890 : 1981 Specification for General Purpose Ball Valves

1 Scope

Specifies requirements for cast iron and carbon steel ballvalves for general purposes.

It covers the valves of nominal sizes DN 10 to DN 600 in Classes125, 150, 250, 300 and 600 with flanged ends or with internal screwthreads in accordance with IS 554 : 1975 `Dimensions for pipethreads where pressure tight joints are required on the threads(second revision) for nominal sizes 1/4 to 4