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Unformatted text preview: Revised 01/05/12 1 ME 4232: Fluid Power Control Lab University of Minnesota Prof. Perry Y. Li Lab 7: Check valves & Pilot operated check valves Objective Check valves are one-way directional valves i.e., allow free-flow in one direction and block the flow in the other direction. They are used to prevent reverse flows and also to bypass components. Pilot operated check valves differ from regular check valves due to the fact that, in addition to the free-flow in one direction, they will allow reverse flow when the pressure signal to a third port is higher than a certain value. In this lab you will study the utility of both these valves and also characterize the pilot-operated check valve. Actuator speed control circuit Pre-lab – Due as a hardcopy at the beginning of lab Analogy to electrical circuits – Write a one-paragraph summary on how the hydraulic variables (pressure, flow and orifice area) can be qualitatively related to the electrical variables (voltage, current and resistance). Lab 3 and orifice area) can be qualitatively related to the electrical variables (voltage, current and resistance)....
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This note was uploaded on 02/07/2012 for the course ME 4232 taught by Professor Staff during the Fall '08 term at Minnesota.
- Fall '08