Specifies requirements for high duty cast iron and alloy cast iron valves for refrigeration plants. It covers the valves of high and normal pressure with screwed ends as well as with the flanged ends of typical shape and design corresponding to the size of the valves.
1.1 The valves shall be of rising stem with handwheel.
1.2 This standard covers the nominal sizes of 6, 10, 15, 20, 25, 32, 40, 50, 65, 75 and 100 mm.
Note — The sizes 32 and 65 mm are non-preferred sizes.