This API standard specifes the requirements for a heavy-duty series of bolted bonnet steel globe valves for petroleum refnery and related applications where corrosion, erosion, and other service conditions would indicate a need for heavy wall sections and large stem diameters.
This standard sets forth the requirements for the following globe valve features:
— bolted bonnet;
— pressure seal bonnet;
— outside screw and yoke;
— rotating rising stems and nonrotating rising stems;
— rising handwheels and nonrising handwheels;
— straight pattern, y-pattern, right-angle;
— stop-check (nonreturn type globe valves in which the disc may be positioned against the seat by action of the stem but is free to rise as a check valve due to fow from under the disc when the stem is in a full or partially open position);
— plug, narrow, conical, ball, or guided disc;
— metallic seating surfaces;
— fanged or butt-welding ends.
It covers valves of the nominal pipe sizes NPS:
— 2, 2 1 / 2 , 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24; corresponding to nominal pipe sizes DN:
— 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600; applies for pressure class designations:
— 150, 300, 600, 900, 1500, 2500.
