Water Hammer Valve Closing Time Formula
|
| \(\large{ t = \frac{ 0.070 \;v \;l }{ p_{inc} \;-\; p_i } }\) |
| Symbol |
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 |
\(\large{ft}\) |
\(\large{m}\) |
