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Water Control Valves - Flow Coefficient Cv Diagram

The flow coefficient Cv for a water control valve can be estimated with the diagram below:

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Example - Required Cv for a water control valve

With water flow 6 gpm and designed pressure drop 10 psi through a control valve - the required flow coefficient Cv can be estimated to ~2 as indicated in the chart below.

Related Topics

• Control Valve Sizing

Control Valve terminology, bodies, trim, flow characteristics, Cv and Kv sizing, noise, actuators, positioners and more.

Related Documents

Ball Valves - Flow Coefficients Cv

Flow coefficients - Cv - for typical ball valves - reduced and full bore.

Butterfly Valves - Flow Coefficients Cv

Typical flow coefficients - Cv - for butterfly valves.

Control Valves - Adding Flow Coefficients for Valves in Series or Parallel

How to add flow coefficients for control valves in series or parallel.

Flow Coefficient Cv vs. Flow Factor Kv

Comparing flow coefficients Cv to flow factors Kv.

Liquid, Steam and Gas - Flow Coefficients Cv

Calculate flow coefficients for the design of control valves - Imperial units.

Liquids - Critical Pressure Ratios

Critical pressure ratios for water and other liquids.

Steam Control Valves - Calculate Flow Factor Kv

Designing steam control valves and their Kv values.

Straight Through Diaphragm Valves - Flow Coefficients

Flow coefficients - Cv - and flow factors - Kv - for straight through diaphragm valves.

Valve Authority

The valve authority expresses the ratio between pressure drop across the control valve compared to total pressure drop across the whole system.

Water Control Valves - Flow Factor Kv Diagram

Sizing of water control valves - SI units

Water Control Valves - Kv Calculation

Designing water process control valves and their Kv values.

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