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Tables for Valve Sizing Calculations

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Temperature units conversion

  °C      

°C
  

°F
  

°K
 Temp. °F    

 
  

 

 
  °K                

Pressure units conversion

  bar      

bar
  

PSI
  

KPa
 Press. PSI    

 
  

 

 
  KPa                

Flow factors unit conversion

 FACTOR
 Kv (l/min)      

Kv (l/min   
Kvh (mc/hour)   
CVe (imp.gal/min)   
Cv (US gal/min)   

 
 Kvh (mc/hour)  

 
CVe (imp.gal/min)    
  Cv (US gal/min)      

Kv flow factor calculation for liquids

Flow
needed
  l/min.  

Differential
pressure
  

MEDIA
    

Minimum Kv
required

 mc/hour  

  bar
  

 


Kv flow factor calculation for GAS with: ( p.input <= p.output/2)

Flow
needed		 l/min.
Nmc/hour		   Differential
pressure		   MEDIA  

  Minimum Kv
required
   bar      
    Temp. °C      

Kv flow factor calculation for GAS with: ( p.input > p.output/2)

Flow
needed		 l/min.
Nmc/hour		  

Input Pressure
 bar
Output Press.
 bar
Diff. Pressure
 bar
   MEDIA  

  Minimum Kv
required
       
    Temp. °C