Transcription of HANDBOOK FOR CONTROL VALVE SIZING - Parcol
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HANDBOOK FOR CONTROL VALVE SIZING - Parcol
Bulletin 1-I HANDBOOK FOR CONTROL VALVE SIZING TECHNICAL BULLETIN 1-I HANDBOOK FOR CONTROL VALVE SIZING 1 HANDBOOK FOR CONTROL VALVE SIZING NOMENCLATURE SIZING AND SELECTION OF CONTROL valves 0 NORMATIVE REFERENCES 1 PROCESS DATA 2 VALVE SPECIFICATION 3 FLOW COEFFICIENT Flow coefficient KV (metric units) Flow coefficient CV (imperial units) Standard test conditions 4 SIZING EQUATIONS SIZING equations for incompressible fluids (turbulent flow) SIZING equations for compressible fluids (turbulent flow) SIZING equations for two-phase flows SIZING equations for non-turbulent flow 5 PARAMETERS OF SIZING EQUATIONS Liquid pressure recovery factor FL Coefficient of incipient cavitation xFZ a
valve to total head loss along the process line at various operating conditions. e. Operational data, such as: - maximum differential pressure with closed valve; - stroking time; - plug position in case of supply failure; - maximum allowable leakage of valve in closed position; - fire resistance; - maximum outwards leakage;
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