Repeat Problem 10.55 for flow rates of 7.5 gal/min and 10.0 gal/min.Problem 10.55For the d...

Repeat Problem 10.55 for flow rates of 7.5 gal/min and 10.0 gal/min.

Problem 10.55

For the data from Problem 10.53, compute the equivalent value of the resistance coefficient K if the pressure drop is found from Δp = γhL and hL = K(v2/2g). The oil has a specific gravity of 0.90. The K factor is based on the velocity head in a 5/8-in -OD steel tube with a wall thickness of 0.065 in.

Problem 10.53

A fluid power system incorporates a directional control valve similar to that shown in Fig. 10.30 (a). Determine the pressure drop across the valve when 5.0 gal/min of hydraulic oil flows through the valve from the pump port to port A.

FIGURE 10.30 Fluid power system.