When using a flow control valve (needle valve) to control the speed of actuation of a cylinder, what needs to be added to the valve in order to maintain that speed under varying load pressures and why?

When using a flow control valve (needle valve) to control the speed of actuation of a cylinder, what needs to be added to the valve in order to maintain that speed under varying load pressures and why?

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter24: Expansion Devices

Section: Chapter Questions

Problem 12RQ: Explain the following terms as they apply to electronic expansion valves: step motor offset error...

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