The Ultimate Hydraulics Glossary

Hydraulics Online Fluid Power Technical Knowledge Hub:
Hydraulic Engineering Glossary of Terms and Terminology

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Whether you seek detailed technical help from us or know exactly what you need, we will always be transparent, ensuring you are fully aware of your choices. Our hydraulics glossary of terms is part of that commitment.

We recognise that our customers come to us with differing levels of technical knowledge – from highly qualified, time-served engineers to absolute beginners. Our award-winning team never want to blind you with jargon, so if you’re not a hydraulic expert yourself then why not bookmark this curated collection of hydraulic engineering terms and terminology?

Our hydraulics glossary covers everything from Abrasion (the external damage, especially to the hose assembly, caused by rubbing on a foreign object; wearing away by friction) to Working Pressure (the maximum pressure to which a hose will be subjected, including momentary surges in pressure, which can occur during service) and everything in between!

If you can’t find an answer to what you’re looking for, or can think of any hydraulic terms beginning with the letter ‘Z’, then please get in touch via: feedback@hydraulicsonline.com – we’d love to hear from you!

Click on the letters to enter our hydraulics glossary and learn more…

A a:

“Abrasion” to “Attenuator”

A:

B b:

“Back Connected” to “Bypass”

B:

C c:

“Cam” to “Cylinder Thrust”

C:

D d:

“Dead Time” to “Dust Plug”

D:

E e:

“Eccentric Wall” to “Exhaust Time”

E:

F f:

“Fatigue” to “Full-Fluid-Film Lubrication”

F:

G g:

“Gas-Loaded Accumulator” to “Ground”

G:

H h:

“Head” to “Hydrostatic Transmission”

H:

I i:

“Immiscible” to “Interface”

I:

J j:

“Joule”

J:

K k;

“Kinematic Viscosity” and “Kinetic Energy”

K:

L l:

“Lag” to “Lubricity”

L:

M m:

“Manifold” to “Muffler”

M:

N n:

“Needle Valve” to “Non-Petrolium Based Oil”

N:

O o:

“O-Ring” to “Oxidation Inhibitor”

O:

P p:

“Packing” to “Pumps”

P:

Q q:

“Quick Action Coupling”

Q:

R r:

“Rack and Pinion Actuator” to “Rotary Actuator”

R:

S s:

“Sae Port” to “System Pressure”

S:

T t:

“Tandem-Centre Valves” to “Two-Way Valves”

T:

U u:

“Unbalanced Vane Pump” to “Unloading Valve”

U:

V v:

“Vacuum” to “Viscosity”

V:

W w:

“Wafer Valve” to “Working Pressure”

W

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