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Principles of Hydraulic Systems Design, Second Edition by Peter Chapple

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CHAPTER 7

CIRCUIT DESIGN

7.1  INTRODUCTION

To a very large degree, the main function of hydraulic circuits is to control the flow to one or several actuators as required by the application. There are, however, a variety of methods for controlling flow, some of which act indirectly by using pressure as the controlling parameter.

The circuits discussed in this chapter include the following:

  • Directional control and valve configurations
  • Velocity controls with constant supply pressure
  • Velocity controls with load sensing
  • Variable displacement pump controls
  • Hydrostatic transmissions
  • Load control
  • Contamination control

7.2  PRESSURE AND FLOW

Hydraulic systems provide flow from the pump that is directed to one or more actuators (motors) at a pressure ...

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