4.5 Flow Control Valves
Describe how restriction style flow control valves control flow in a hydraulic system making use of a fixed displacement pump and a pressure relief valve.
Draw the schematic symbols for the following devices:
fixed flow control valve
adjustable flow control valve
adjustable flow control valve with check valve bypass
pressure compensated adjustable flow control valve with check valve bypass
temperature and pressure compensated adjustable flow control valve with check valve bypass
Given the orientation of this adjustable flow control valve with check valve bypass determine the direction of free flow and the direction of controlled flow.
Draw a cutaway view of an adjustable flow control valve with check valve bypass and discuss how it functions.
Describe how an adjustable flow control valve with check valve bypass responds to these scenarios:
input pressure increases and load stays the same
input pressure decreases and load stays the same
input pressure stays the same and load decreases
input pressure stays the same and load increases
input pressure and load return to initial conditions
Draw a cutaway view of a pressure compensated adjustable flow control valve with check valve bypass and discuss how it functions.
Describe how a pressure compensated adjustable flow control valve with check valve bypass responds to these scenarios:
input pressure increases and load stays the same
input pressure decreases and load stays the same
input pressure stays the same and load decreases
input pressure stays the same and load increases
input pressure and load return to initial conditions
Discuss how a temperature and pressure compensated adjustable flow control valve with check valve bypass functions.
Describe how a pressure compensated adjustable flow control valve with check valve bypass enhances the performance of multi actuator systems.
Discuss how a bypass type flow control valve works and differentiate between it and a restriction style flow control valve.
Discuss means other than manually changing flow rate.
Describe lunge control.
