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, is
used for regulating liquids, gases, and vapor flow
by means of throttling (adjusting rate of flow).
They are well suited for services requiring
regulated flow and/or frequent valve settings
(throttling).
Pipe Supports
Pipes are designed to be used for structural
applications only to the extent of withstanding
normal soil loads and internal pressures up to their
hydrostatic pressure rating. Therefore, any pipe
supplying air, water, or steam, when exposed
aboveground and in the interior of buildings must
be supported adequately to prevent sagging.
The weight of the pipes plus the weight of fluid
contained in them may produce strained joints
and breaks that can cause leaks in the valves.
Figure 8-10 shows several methods of supporting
pipe in both horizontal and vertical positions. On
Figure 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 to
prevent pipe displacement caused by high water
pressure.
8-8
