Which outcome occurs when pilot-operated relief valve's control orifice becomes blocked with debris?

💡 Explanation

When the control orifice is blocked, pressure cannot reach the pilot stage because fluid flow is impeded, preventing the valve from opening as pressure rises. Therefore valve failure occurs causing system pressure to greatly exceed, rather than cycling, remaining open or chattering which require the pilot stage being functional.

• Which risk increases when using a proportional valve-controlled hydraulic actuator at very high frequencies?
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