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 » |
| valve flutter (valve bounce) |
uncontrolled
oscillation of a com-pressor valve on its seat during opening or closing. |
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| valve guard |
part which limits
or controls the opening of a valve.
valve
lift vertical
distance through which a valve is raised to allow the passage of a fluid. |
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| valve obturator | that part of a valve that
closes off or stops fluid flow |
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| valve plate |
plate on which the
valves of a reciprocating or rotary compressor are located. valve plug generic name for that part of a
valve which mates with the seat to control or shut off flow |
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| valve port | opening for passage of a
fluid in a valve |
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| valve seat |
stationary portion of the
valve which, when in contact with the movable portion, stops flow completely |
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| valve stem |
spindle movable
towards or away from a valve seat for guiding the valve head during closing or
opening. |
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| valve trim |
internal parts
(stem, plug, disc, seat, etc.) of a valve. |
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| vapor |
1. substance in the gaseous state that can also
exist as a liquid or solid at normal atmospheric conditions. Compare gas.
2. gas, particularly one near equilibrium with
its liquid phase and one that does not follow the gas laws. The term is usually
used instead of gas to refer to a refrigerant, or in general, to any gas below
the critical temperature. |
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| vapor barrier |
use vapor retarder. See
water-vapor retarder |
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