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Valves and flow control

Manual and mechanical valvesActuated valvesControl valvesSolenoid valvesActuators and control accessories

Pipe and piping fittings

Industrial pipesButt-weld fittingsHigh-pressure forged fittingsThreaded and galvanized fittingsReinforced branch outletsPolymer pipe, valves and fittings

Joining, flanges and sealing

Industrial flangesGaskets and sealing systemsLine blinds and isolation platesStud bolts, bolts and nuts

Steam, strainers and equipment protection

Steam and condensate equipmentPipeline strainers and filters

Instrumentation and measurement

Process measurement instrumentsInstrument fittings and manifolds

Supports and flexible connections

Pipe supports, hangers and clampsExpansion joints and flexible connectors

Steel products and sections

Industrial steel sections and products

Valves and flow control

Control valves

Control-valve selection requires capacity sizing plus cavitation, flashing, noise, velocity and rangeability checks; line size alone does not determine valve size.

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Type and construction

Available types

Each type has its own technical page
1

Globe control valve

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Angle control valve

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Segmented ball control valve

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V-port ball valve

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Control butterfly valve

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Three-way mixing valve

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Three-way diverting valve

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Pressure-independent control valve

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Steam control valve

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Pneumatic control valve

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Electric control valve

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Quick comparison

How the main types differ in selection

Open a type for full details
TypePurposeBest suited toWatchpoint
Globe control valveFlow regulation or isolation with controlled disc travelManual regulation, steam and duties where pressure drop is acceptableFlow direction, pressure drop, trim and seat leakage class
Angle control valveContinuous modulation of flow or a process variable from a control signalFlow, pressure, temperature and level control loopsFlow coefficient sizing, trim characteristic, noise, cavitation and fail action
Segmented ball control valveFast isolation with a low-restriction flow pathServices requiring tight isolation and quarter-turn operationSeat compatibility, trapped cavity, torque and body-cavity pressure rise
V-port ball valveFast isolation with a low-restriction flow pathServices requiring tight isolation and quarter-turn operationSeat compatibility, trapped cavity, torque and body-cavity pressure rise
Control butterfly valveIsolation or control with a compact quarter-turn designMedium and large sizes, water, utilities and many process servicesSeat design, offset, disc-to-pipe clearance and permitted velocity
Three-way mixing valveContinuous modulation of flow or a process variable from a control signalFlow, pressure, temperature and level control loopsFlow coefficient sizing, trim characteristic, noise, cavitation and fail action
Three-way diverting valveContinuous modulation of flow or a process variable from a control signalFlow, pressure, temperature and level control loopsFlow coefficient sizing, trim characteristic, noise, cavitation and fail action
Pressure-independent control valveContinuous modulation of flow or a process variable from a control signalFlow, pressure, temperature and level control loopsFlow coefficient sizing, trim characteristic, noise, cavitation and fail action
Steam control valveContinuous modulation of flow or a process variable from a control signalFlow, pressure, temperature and level control loopsFlow coefficient sizing, trim characteristic, noise, cavitation and fail action
Pneumatic control valveContinuous modulation of flow or a process variable from a control signalFlow, pressure, temperature and level control loopsFlow coefficient sizing, trim characteristic, noise, cavitation and fail action

1 additional types above have their own detail pages.

Before selection

Information to define

  1. 1Flow coefficient
  2. 2Pressure drop
  3. 3Cavitation and flashing
  4. 4Leakage class
  5. 5Flow characteristic
  6. 6Actuator and positioner

Typical materials

Carbon steelStainless steelAlloy steelDuctile ironErosion-resistant trim

Typical connections

FlangedWeldedThreadedWafer

Typical media

LiquidGasSteamTwo-phase

Function

What does this family do?

Modulation and continuous control

Modulation of flow, pressure, temperature or level by manual or automatic command

Functional selection guide

Pressure reduction and sustaining

Maintaining downstream or upstream pressure with direct or pilot operation

Functional selection guide

Routing, branching and mixing

Changing line direction, dividing or combining flow and creating branches

Functional selection guide

Automation and actuation

Valve movement, command input and position feedback to the control system

Functional selection guide

Technical reference

Related standards

The exact edition and requirements must be checked against the project specification.

IEC 60534ISA 75ASME B16.34FCI 70-2

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Related families

Actuated valves

Valve and actuator packages for automated isolation, emergency shutdown and routing

Actuators and control accessories

Valve movement, control and position monitoring in manual and automated systems

Process measurement instruments

Local or electronic measurement of pressure, temperature, flow and level

Manual and mechanical valves

The broadest family for isolation, non-return, pressure regulation and line protection

Engineering note

This page supports initial screening and does not replace engineering calculations, project specifications, manufacturer approval or design pressure-temperature checks.

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