In fluid control systems, flow and pressure are related but distinct. Flow is movement of fluids while pressure is force. A flow control valve controls the volume of fluid flowing through it while a pressure control valve controls the amount of force. In the simplest of scenarios, flow rate is set by changing the size of the orifice of a traditional flow control valve. For more challenging applications, traditional flow control valves do not always work and alternatives are sometimes required. See the Equilibar flow control page for more information about innovative flow control valves.
Absolute pressure
Air-loaded valve
Back pressure controller
Back pressure reducing valve
Back pressure regulator (BPR)
Back pressure valve
Ball valve
Bernoulli equation
Butterfly valve
Bypass valve
Cavitation
Centrifugal pump
Check valve
Closed-loop control
Compressible flow
Coriolis flow meter
Cv
Density
Derivative control mode
Diaphragm regulator (valve)
Differential pressure
Dome-loaded regulator (valve)
Electronic pressure regulator
Flow chemistry
Flow coefficient of a valve (Cv)
Flow control valve
Gate valve
Gauge pressure
Globe valve
Ideal gas law
Inches water column (in WC)
Incompressible flow
Integral control
Laminar flow (laminar regime)
Lobe pump
Magnetic flow meter
Mass flow meter (MFM)
Mixed-phase flow
Multi-phase flow
Needle valve
Non-Newtonian fluid
Open-loop control
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
Reference
Relief valve
Rotameter
Tangential flow filtration (TFF)
Thixotropic shear thinning
Turbulent flow
Two-phase flow
Vacuum breaker
Vacuum regulator (valve)
Valve Authority
Viscosity
Volumetric flow rate
Water hammer
