Control Valves
Control Valve terminology, bodies, trim, flow characteristics, Cv and Kv sizing, noise, actuators and positioners
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Adding Kv or Cv values
Adding Kv or Cv when control valves are in series or parallel
Control Valve Sizing Calculator for Gases
An online control valve - Cv - calculator for gases
Control Valve Sizing Calculator for Liquids
Online control valve - Cv - calculator for liquids - flow, specific gravity and upstream pressure inputs calculates Cv
Control Valves and Cavitation
Control valves and cavitation, application ratio and multi stage control valves
Control Valves and Flow Characteristics
The relationship between control valve capacity and stem traveling
Cv Diagram Water Valves
Water valve Cv diagram
Fail Closed (FC)
A control valve which should go to closed position on control signal or air failure would be labeled FC
Fail Last (FL)
A control valve which should stay put on control signal or air failure would be labeled FL
Fail Open (FO)
A control valve which should go to the open position on control signal or air failure should be labeled FO
Flow Coefficient - Cv - Formulas for Liquids, Steam and Gases
The flow coefficient - Cv - is important for proper design of control valves
Flow Coefficient Cv and Flow Factor Kv
Comparing the flow coefficient Cv with the flow factor Kv
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Flow Coefficients - Cv - and Flow Factors - Kv - of Straight Through Diaphragm Valves
Typical flow coefficients - Cv - and flow factors - Kv - of "straight-through" diaphragm valves of "Saunders" type
Flow Coefficients - Cv - and Flow Factors - Kv - of Weir Diaphragm Valves
Typical flow coefficients - Cv - and flow factors - Kv - of weir diaphragm valves of "Saunders" type
Gases - Specific Gravities
Specific gravity of air, ammonia, butadiene, carbon dioxide, carbon monoxide and some other common gases
Kv Diagram Water Valves
Kv diagram for modulating water valves
Leakage Classifications of Control Valves
Classification of seat leakage through control valves
Metals and Corrosion Resistance
Common metals and their corrosion resistance to aggressive fluids as acids, bases and more
Normally Closed (NC)
The term Normally Closed
Normally Open (NO)
The term Normally Open
Safety Steam Valve Installation Guide
Guidelines to safety steam valve installation
Sizing and Selection Control Valves
Select and size the control valve that most closely matches the process requirements
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Sizing and Selection of Butterfly Valves
Selecting and sizing butterfly valves for water applications
Sizing Control Valves - A Tutorial
Valve flow characteristics, Cv formulas, materials of construction, body styles and elastomers
Steam Control Valve Calculator
Online control valve steam calculator - flow and upstream and downstream pressure inputs - output Cv
Steam Control Valves - Calculating Kv Values
Design of steam control valves and their Kv values
Valve Authority
Valve authority express the ratio between pressure drop across the control valve compared to the total pressure drop across the whole circuit
Water Control Valves - Calculating Kv Values
Design of water process control valves and their Kv values
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