Figure 8-9.-Cross section of a globe valve.GLOBE VALVE.— The globe valve (fig. 8-9),so-called because of its globular-shaped body, isused for regulating liquids, gases, and vapor flowby means of throttling (adjusting rate of flow).They are well suited for services requiringregulated flow and/or frequent valve settings(throttling).Pipe SupportsPipes are designed to be used for structuralapplications only to the extent of withstandingnormal soil loads and internal pressures up to theirhydrostatic pressure rating. Therefore, any pipesupplying air, water, or steam, when exposedaboveground and in the interior of buildings mustbe supported adequately to prevent sagging.The weight of the pipes plus the weight of fluidcontained in them may produce strained jointsand breaks that can cause leaks in the valves.Figure 8-10 shows several methods of supportingpipe in both horizontal and vertical positions. OnFigure 8-10.-Methods of supporting pipe.water mains, standard thrust blocks (fig. 8-11),made of concrete or other applicable materials,are installed at all changes of direction toprevent pipe displacement caused by high waterpressure.8-8
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