Information modules are provided under this link for aerospace hydraulic system design and components. Hydraulic components addressed include accumulator, actuator, valves, pump, motor, filter, power control units reservoir and servovalve. Pipe and orifice flow is also discussed.
For a more thorough discussion of aerospace hydraulic systems including design equations, component sizing and system design, the following book is available in ibooks. The book contains numerous solved problems and examples to enhance understanding.