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Unformatted text preview: 5. How does the spring rate affect the flow accuracy? 6. Sketch the flow vs. upstream pressure, P A , diagram for the PCFC valve. 7. Is this an efficient control method? Q P A ME4232: Fluid Power Controls Lab Pilot Operated Relief Valve Jim Van de Ven Study the drawing of the pilot-operated relief valve. What is the sequence of events as the pressure increases and the valve opens? Hint: the orifice in the spool skirt and relative spring rates are important...
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- Fall '08