Net Positive Suction Head Vapor Pressure

Written by Jerry Ratzlaff on . Posted in Pump

 

Net Positive Suction Head Vapor Pressure formula

\(\large{ p_v = - \gamma \; \left( NPSH - \frac{ v^2 }{ 2 \; g } - \frac{ p }{ \gamma }  \right)     }\) 
Symbol English Metric
\(\large{ p_v }\) = vapor pressure \(\large{\frac{lbf}{in^2}}\)   \(\large{\frac{kg}{m-s^2}}\)
\(\large{ NPSH }\) = net positive suction head \(\large{\frac{lbf}{in^2}}\)   \(\large{\frac{kg}{m-s^2}}\)
\(\large{ p }\) = pressure \(\large{\frac{lbf}{in^2}}\)  \(\large{Pa}\) 
\(\large{ \gamma }\)  (Greek symbol gamma) = specific weight \(\large{\frac{lbf}{in^2}}\)  \(\large{\frac{N}{m^3}}\) 
\(\large{ v }\) = velocity \(\large{\frac{ft}{sec}}\)  \(\large{\frac{m}{s}}\) 

 

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Tags: Pressure Equations Head Equations Vapor Equations