Water Hammer Valve Closing Time

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Water Hammer Valve Closing Time Formula

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

Where:

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

 

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Tags: Valve Equations Water Hammer Equations