|
ACTIVATED CHARCOAL (Carbon)
|
A porous substance generally
capable of absorbing odors and molecules of organic substances from
gases and liquids. It is commonly used in air filtration. |
|
AUTOMATIC CONDENSATE DRAIN (A.C.D.)
|
By means of one or more electric timers, a solenoid valve
momentarily drains each of the systems separators, automatically,
of accumulated liquid; usually every 15-18 minutes of operation
without the operator must manually perform this function.
Most serious manufacturers will set the
timers to drain periodically and on SHUT DOWN, assuring that the
entire system is moisture free during down time and will re-start
without load.
|
| ADSORPTION |
The adhesion (in any extremely
thin layer) of molecules of gases or liquids to the surface of a
solid, such as a container, causing a greater concentration on that
surface. |
|
AFTERCOOLER
|
A heat exchanger, installed in a compressor system
following the final stage, for the extraction of heat from the
compressed air stream. |
|
ATMOSPHERE
|
Pressure unit equal to 14.7
psi |
|
BAR
|
Barometric pressure unit equal to 14.7 psi |
|
CARBON DIOXIDE
(CO2)
|
Classed as a toxic gas. Less
dangerous than CO. Concentration of more than 10% may be tolerated
for a short period. |
|
CARBON MONOXIDE
(CO)
|
One of the deadliest of the toxic gases. Small
amounts will cause adverse reactions. Danger increased by the fact
that it is both odorless and tasteless. |
|
CATALYST
|
A chemical used to initiate the
conversion of carbon monoxide to carbon dioxide in a respiratory
air purification system (Hopcalite). |
|
CFM
(Cubic Feet Per Minute)
|
A measurement of air flowing through a given point
in one minute. |
|
CONTAMINANT
|
A solid or gaseous substance
which may cause harmful impurity or pollution. |
|
DEHYDRATION
|
Is the removal of water from an air purification system. This is
usually done in two phases which are:
- Mechanical Separation
- Chemical Absorption
|
|
DESICCANT
|
A chemical capable of absorbing
contaminant gases, aerosols and water vapor. |
|
DEW POINT
|
The variable temperature at which water vapor
begins to condense as a liquid at atmospheric pressure. This term
is used to denote the presence of moisture content in the air. |
|
DISPLACEMENT
|
The volume of air displaced by a
full stroke of the first stage piston, multiplied by the rated RPM
of the compressor. This is measured in cubic feet per minute
(CFM). |
|
F.A.D.
(Free Air Delivery)
|
The volume of air which is drawn in from the
atmosphere by the compressor, then compressed and delivered at a
specific rate of pressure. |
|
FILTRATION
|
Filtration rating/de-rating
based on 72oF ambient temperature. If
your filter is rated for 10,000 cft @ 72oF, draining the condensate often, you must
de-rate the 10,000 cft by 2% for every 1oF above 72oF.
The reverse applies for temperature below 72oF. |
|
FILTRATION RATING
|
Usually stated in terms of "absolute" or "normal".
- An absolute micron rating implies that all particles larger
than a given micron value have been removed.
- A normal micron rating generally is taken to mean that 98% of
all particles larger than a given micron value have been
removed.
|
|
HYDROCARBONS
|
Any compound containing only
hydrogen and carbon. |
|
INTERCOOLER
|
A heat exchanger, usually air cooled, installed
between stages of a compressor to cool the gases. This reduces the
volume and increases the efficiency of the succeeding stage. |
|
MICRON
|
A unit of measurement referring
to the dimensions of very small particles and hence used in the
rating of filters. One micron is equivalent to one millionth of one
meter; one thousandth of one millimeter; or approximately 0.00004
of an inch. |
|
MOLECULAR SIEVE
|
A high grade crystalline alumino silicate used as
an absorbent. It has excellent drying properties and is valuable in
the removal of water and oil vapors from air and gases (molecular
sieve 13X). |
|
PRESSURE MAINTAINING VALVE (P.M.V.) aka
BACK PRESSURE VALVE
|
Typically employed to maintain constant pressure
on the filter system. Thereby, increasing efficiency of the
purification process for optimum air processing and prolonged cycle
life.
|
|
PSI
(Pounds Per Square Inch)
|
An expression used in the measurement of air
pressure. |
|
PSIG
(Pounds Per Square Inch-Gauge)
|
This measurement of air pressure
does not include atmospheric pressure and starts at 14.7 psi. |
SCFM
(Standard Cubic Feet Per Minute) |
A measurement of air flow corrected to standard
conditions used by all compressor manufacturers except one. The
world standard refers to filling an 80 cubic foot cylinder from
0~2800 psig. The other system refers to SCFM in the filling of that
cylinder from 500~3000 psig. This assumes that all cylinders have
500 psig residual pressure. |