IS 10611 : 1983 Specification for Steel Gate Valves (Flanged and Butt-welded Ends) for Petroleum, Petrochemicals and Allied Industries

1 Scope

Specifies the requirements for steel gate valves with flanged orbutt-welded ends.

1.1 The standard covers valves in nominal size of 25 mm to 600mm corresponding to nominal sizes specified in IS 9520 : 1980`Nominal sizes for valves`.

1.2 The valve shall be outside screw and yoke type (OS and Y)with rising stem, non-rising hand-wheel, bolted bonnet and withvarious types of gates.

1.3 The standard nomenclature for valve parts is shown in Fig.1, which is also illustrative of some acceptable gate valvedesigns.