Fluid Control Glossary - Equilibar Precision Fluid Control
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Fluid Control Glossary

Fluid control terminology can be confusing, even for experienced professionals. Moreover, preferred usage sometimes varies according to specific geographic locations, industries and applications. Consult our glossary below for practical explanations of flow and pressure control terms. Feel free to contact us with questions and comments. Disclaimer: While this glossary has been carefully compiled, definitions are based on Equilibar’s interpretation and experience and may at times vary from specific definitions used by others.

a b c d e f g h i j k l m n o p q r s t u v w x y z
A

Absolute pressure

Air-loaded valve

B

Back pressure controller

Back pressure reducing valve

Back pressure regulator (BPR)

Back pressure valve

Ball valve

Bernoulli equation

Butterfly valve

Bypass valve

C

Cavitation

Centrifugal pump

Check valve

Closed-loop control

Compressible flow

Coriolis flow meter

Cv

D

Density

Derivative control mode

Diaphragm regulator (valve)

Differential pressure

Dome-loaded regulator (valve)

E

Electronic pressure regulator

F

Flow chemistry

Flow coefficient of a valve (Cv)

Flow control valve

G

Gate valve

Gauge pressure

Globe valve

I

Ideal gas law

Inches water column (in WC)

Incompressible flow

Integral control

L

Laminar flow (laminar regime)

Lobe pump

M

Magnetic flow meter

Mass flow meter (MFM)

Mixed-phase flow

Multi-phase flow

N

Needle valve

Non-Newtonian fluid

O

Open-loop control

P

Peristaltic pump

PID controller

Pilot operation

Pipe friction

Positive displacement pump

Pressure reducing regulator (PRR)

Pressure reducing valve (PRV)

Pressure sustaining valve

Proportional control

Proportional valve

Pump slip

R

Reference

Relief valve

Rotameter

T

Tangential flow filtration (TFF)

Thixotropic shear thinning

Turbulent flow

Two-phase flow

V

Vacuum breaker

Vacuum regulator (valve)

Viscosity

Volumetric flow rate

W

Water hammer

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