API STD 623-2021

$27.95

Steel Globe Valves—Flanged and Butt-welding Ends, Bolted Bonnets

Published By	Publication Date	Number of Pages
API	2021	39

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Category: API

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Description

This API standard specifies the requirements for a heavy-duty series of bolted bonnet steel globe valves for petroleum refinery 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:

— 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 flow 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;
— flanged or butt-welding ends.

It covers valves of the nominal pipe sizes NPS: