Flow Coefficient Cv vs. Flow Factor Kv
Comparing flow coefficients Cv to flow factors Kv.
Sponsored Links
The flow coefficient - Cv - or the flow factor - Kv - are commonly used to specify capacities of control valves.
Flow Coefficient - Cv
It is often convenient to express the capacity and flow characteristic of a control valve in terms of the
- Flow Coefficient - Cv
The flow coefficient - Cv - is based on the imperial units system and is defined as:
- the flow of water through a valve at 60 oF in US gallon/minute at a pressure drop of 1 lb/in2
The flow coefficient is commonly used in the U.S.
Flow Factor - Kv
The metric equivalent of the flow coefficient - Cv - is based on the SI-system and is called the
- Flow Factor - Kv
The flow factor - Kv - is defined as
- the flow of water with temperature ranging 5 - 30 oC through a valve in cubic meters per hour (m3/h) with a pressure drop of 1 bar
The flow factor is commonly used outside U.S.
Converting between Flow Coefficient Cv and Flow Factor Kv
The relationship between Cv and Kv can be expressed as:
- Cv = 1.16 Kv (1)
- Kv = 0.862 Cv (2)
Sponsored Links
Related Topics
-
Control Valves
Control Valve terminology, bodies, trim, flow characteristics, Cv and Kv sizing, noise, actuators and positioners -
Control Valves and Equipment
Sizing and dimensions of control valves & equipment in steam and condensate systems. -
Fluid Mechanics
The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time. -
Pipe Sizing
Sizing of steam and condensate pipe lines - pressure loss, recommended velocity, capacity and more. -
Piping Systems
Dimensions of pipes and tubes, materials and capacities, pressure drop calculations and charts, insulation and heat loss diagrams. -
Process Control
Instrumentation and process control systems - design and documentation. -
Steam and Condensate
Steam & condensate systems- properties, capacities, pipe sizing, systems configuration 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. -
Liquid, Steam and Gas - Flow Coefficients Cv
Calculate flow coefficients for the design of control valves - Imperial units. -
Liquid, Steam and Gas - Flow Factor Kv
Calculate flow factor Kv for liquids, steam and gases - metric units. -
Straight Through Diaphragm Valves - Flow Coefficients
Flow coefficients - Cv - and flow factors - Kv - for straight through diaphragm valves. -
Technical Terms in Fluid Mechanics
Some commonly used technical terms in fluid mechanics. -
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. -
Water Control Valves - Flow Coefficient Cv Diagram
Sizing of water control valves - Imperial units. -
Weir Diaphragm Valves - Flow Coefficients and Flow Factors
Typical flow coefficients - Cv - and flow factors - Kv - for weir diaphragm valves.
