Glossary
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The terms and definitions included
in this glossary were taken from "ASHRAE Terminology of Heating, Ventilation,
Air Conditioning & Refrigeration".
To access the complete glossary please
visit ASHRAE's Bookstore.
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| Pages: 1 2 3 » |
| vacuum | state in which the gas
pressure is lower than atmospheric pressure |
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| vacuum breaking (vacuum cracking) |
increasing the
pressure in an enclosure under vacuum by admitting gas (air). |
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| vacuum test |
test to check the
gas tightness of an uncharged refrigeration system by drawing a vacuum on it. |
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| validity |
correctness;
especially the degree of closeness by which iterated results approach the
correct result. |
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| valve |
device to regulate
or stop the flow of fluid in a pipe or a duct by throttling. |
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| valve area | variable area encountered
by a fluid flowing through a valve. |
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| valve body |
shell or housing
of a valve, into which the mechanism for regulating flow is fitted. |
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| valve cage | device for holding and
locating a valve disc, poppet, etc. in relation to a valve seat |
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| valve cover |
removable part
which allows access to the valve mechanism. |
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| valve disc |
disc or button
fixed to the end of a valve stem and which meets the valve seat on closure. |
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