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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