August 2001

Special Report: Fluid Flow

Avoid control valve application problems with physics-based models

Kinetic energy criteria have many limitations

Roth, K. W., Consumer Durables Group, Arthur D. Little; Stares, J. A., Dresser Flow Control, Masoneilan Operations

Control valves play a central role in the control and optimal performance of a myriad of industrial flow processes. In "severe service" applications, control valves are equally crucial for safely dissipating high process fluid energy levels to avoid valve and piping damage from acoustic noise, vibration, cavitation and erosion. To varying degrees, all of these potentially damaging phenomena scale with flow velocities in the valve and valve trim, leading some valve manufacturers to recommend specific limits to fluid kinetic energy ( KE) in the valve trim. This article explores the rationale for KElimitations and demonstrates that KEcriteria often provide very rough approxima

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