Globe Valve are probably the
most common valves in existence. The globe valve derives is name
from the globular shape of the valve body. They are widely used
in industry to regulate fluid flow in both on/off and throttling
service. Globe valves consist of the following moving parts - the
disk, the valve stem, and the hand-wheel. The stem connects the
hand-wheel and the disk. It is threaded and fits into the threads
in the valve bonnet. The location of the valve disk in relation
to the valve seat allows or restricts flow. The direction of fluid
flow through the valve changes several times, which increases the
pressure drop across the valve. In most cases, globe valves are
installed with the stem vertical and the higher-pressure fluid stream
connected to the pipe side above the disk, which helps to maintain
a tight seal when the valve is fully closed.
|