Control Valve Sizing

CF

&APage &PCf FactorOKThe critical flow factor is a dimensionless expression of the pressure recovery ratio in a control valve. Either obtain a value from a vendor catalogue, use the table in the Masoneillan sizing catalogue, or use a value of 0.85 as an initial guess.

Liquid Control Valve SizingWorleyClientWorleyProject NumberProject TitleStandard CalculationCalculation NumberWS-CA-PR-028Calculation TitleControl Valve SizingSheet NumberRevision0Validated byMMcValidation Date25/7/03CONTROL VALVE SIZING ACCORDING TO MASONEILLAN CALCULATION METHODLiquid Service EquationsProject :By :Valve :Date :10-Oct-03Sub-Critical FlowCritical FlowFlowrate425760kg/hSpecific Gravity at flowing temperature0.597(water = 1.0)P1 (upstream pressure)105baraP2 (downstream pressure)37.6baraPc (critical pressure)157.14baraPv (vapour pressure at flowing temperature)105baraCf (critical flow factor)0.85Calculated DP67.4barCalculated DPs28.23barCf2 * DPs20.40barFlow isCriticalCalculated Cv141.53

&A&L&8&F&C&8Page &P&R&8&DCf Factor

Gas Control Valve SizingWorleyClientWorley ABBProject NumberProject TitleStandard CalculationCalculation NumberWS-CA-PR-028Calculation TitleControl Valve SizingSheet NumberRevision0Validated byMMcValidation Date25/7/03CONTROL VALVE SIZING ACCORDING TO MASONEILLAN CALCULATION METHODGas and Vapour Service EquationsProject :By :Valve :Date :10-Oct-03Sub-Critical FlowCritical FlowFlowrate2303kg/hSpecific Gravity0.623(air = 1.0)Flowing Temperature60CSpecific Gravity at flowing temperature0.539P1 (upstream pressure)10baraP2 (downstream pressure)1baraZ (compressibility at upstream conditions)0.98Cf (critical flow factor)0.85Calculated DP9bar0.5 * Cf2 * P13.61barFlow isCriticalCalculated Cv19.91

&A&L&F&CPage &P&R&DCf Factor

Open

&APage &PControl Valve SizingContinueCalculation of the valve coefficient, Cv, for a gas or liquid control valve using the Masoneilan sizing equations.Standard Calc No. WS-CA-PR-028, Rev 0 Validated by M.Mc, Worley, Melbourne 25-Jul-03

&APage &P

MBD000456A2.unknown

MBD0005A5F5.unknown

MBD0005A5F4.unknown

MBD00040765.unknown

MBD00044227.unknown