Hydraulic Abbreviations, Hydraulic short form, Metric abbreviations
Hydraulic abbreviations speak to hydraulic short form and metric abbreviations with metric equivalents are those commonly used in the hydraulic industry. Most often abbreviations are used in written text but not while speaking although this is not always true.
An abbreviation (from Latin brevis, meaning short) is a shortened form of a word or phrase. Usually, but not always, it consists of a letter or group of letters taken from the word or phrase. For example, the word abbreviation can itself be represented by the abbreviation abbr., abbrv. or abbrev.
In strict analysis, abbreviations should not be confused with contractions or acronyms (including initialisms), with which they share some semantic and phonetic functions, though all three are connoted by the term "abbreviation" in loose parlance. An abbreviation is a shortening by any method; a contraction is a reduction of size by the drawing together of the parts.
A contraction of a word is made by omitting certain letters or syllables and bringing together the first and last letters or elements; an abbreviation may be made by omitting certain portions from the interior or by cutting off a part. A contraction is an abbreviation, but an abbreviation is not necessarily a contraction.
Abs---- absolute (as in psia)
AC----- alternating current
Bhn---- Brinell hardness number
Btu---- British thermal unit
C------ Centigrade degrees (Celcius)
cc-----closed center
ccw----counter clockwise
cfm----cubic feet per minute
cfs----cubic feet per second
cir-----cubic inches per revolution
cim----cubic inches per minute
com---Common
cpm---cycles per minute
cps---cycles per second
cu.in/rev---cubic inches per revolution
cw----clockwise
cyl----cylinder
DC----direct current
dia----diameter
ext----external
F------degrees Fahrenheit
fl------fluid
fpm----feet per minute
ft------foot
ft lb----foot pound
gal-----gallon
gpm----gallons per minute
Hg-----mercury
HP-----horsepower
Hz-----hertz
ID-----inside diameter in inch
in lb---inch pound
int-----internal
ipm----inches per minute
ips-----inches per second
Ib------pound
max----maximum
min-----minimum
mtd----mounted
NC-----normally closed
NO-----normally open
NPT----national pipe thread
NPTF---dryseal pipe threads
oc------open center
oz------ounce
PO-----pilot operated
pres---pressure
PSI----pounds per square inch
psia----psi absolute
psig----psi gauge
pt------pint
qt------quart
r-------radius
rms-----root mean square
rpm-----revolutions per minute
rps------revolutions per second
scfm----standard cu ft per minute
Smls----seamless
sol------solenoid
SSU-----Saybolt seconds universal
SUS-----Saybolt universal seconds
u--------micrometers or microns
T--------torque
vac------vacuum
VI-------viscosity index
visc------viscosity
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