Water Hammer Pressure Increase

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Tags: Water Hammer

 

Water Hammer Pressure Increase Formula

\(\large{ p_{inc} =  \frac{ 0.070  \; v \; l }{ t } + p_i  }\)     (Water Hammer Pressure Increase)

\(\large{ v =  \frac{ \left( p_{inc}  \;-\; p_i \right) \; t }{ 0.070  \; l }  }\)

\(\large{ l =  \frac{ \left( p_{inc}  \;-\; p_i \right) \; t  }{ 0.070  \; v }  }\)

\(\large{ t =  \frac{ 0.070  \; v \; l }{ p_{inc}  \;-\; p_i }  }\)

\(\large{ p_i = p_{inc} - \frac{ 0.070  \; v \; l }{ t }  }\)

Symbol English Metric
\(\large{ p_{inc} }\) = pressure increase \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)
\(\large{ v }\) = flow velocity \(\large{\frac{ft}{sec}}\) \(\large{\frac{m}{s}}\)
\(\large{ p_i }\) = inlet pressure \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)
\(\large{ l }\) = upstream pipe length \(\large{ft}\) \(\large{m}\)
\(\large{ t }\) = valve closing time \(\large{sec}\) \(\large{s}\)

 

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Tags: Water Hammer