scope:

1.1 Scope

1.1.1 This standard covers Class 150, cast, corrosion-resistant, flanged-endgate valves in sizes NPS ½ through 12. These sizes correspond to nominal pipe sizes in ASME B36.10M.

1.1.2 The valves are outside-screw-and-yoke (OS & Y) valves with rising stem, nonrising handwheel, bolted bonnet, integral seats in the body and on the gate or separate seats in the body, raised-face end flanges, and various types of gates.

1.1.3 Figure 1 illustrates a typical acceptable design for a gate valve and shows the standard nomenclature for valve parts.

1.1.4 The dimensions in customary units are standard. Metric (SI) units are shown for reference.