A commercial steel pipe ( $\varepsilon=0.0018 \mathrm{in}$.) is $1 \frac{1}{2} \mathrm{in}$. Sch. 40 diameter, $50 \mathrm{ft}$ long, and includes one globe valve. If the pressure drop across the entire line is $22.1 \mathrm{psi}$ when it is carrying water at a rate of $65 \mathrm{gpm}$, what is the loss coefficient for the globe valve? The friction factor for the pipe can be calculated from the equation

\[f=\frac{0.0625}{[\log (3.7 D / \varepsilon)]^{2}}\]