For the data from Problem 10.53, compute the equivalent value of the resistance coefficient K if the pressure drop is found from Δp = γh_Land h_L= 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.

Data from 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

Transcribed Image Text:

Actuator Load Motion B A Flow Flow control valve Flow A B Directional control valve P T Pump Pressure relief valve L Tank (a) Forward actuation