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A precise industrial control-valve cutaway with a multi-stage perforated trim stack, restrained blue liquid streams and small cavities confined within staged passages.

Reactors & equipment

Anti-Cavitation Control Valves

Dr. Oleg V. Kozyuk

okozyuk.com

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Abstract

Cavitation in liquid control valves results from local pressure reduction below vapor pressure followed by vapor collapse during pressure recovery. The associated microjets, pressure waves, vibration, and unsteady hydraulic forces can cause trim erosion, pressure boundary damage, noise, loss of control authority, and reduced service life. This article presents a unified engineering treatment of cavitation physics, liquid valve sizing parameters, pressure recovery behavior, and anti-cavitation trim architecture. The discussion relates cavitation indices and liquid choking criteria to practical design strategies, including staged pressure reduction, opposed jet bubble isolation, stacked disk and concentric sleeve trims, axial multistage geometries, multipath trims, dirty service configurations, and fixed energy dissipators. Material selection, seat protection, outlet velocity, actuator stability, solids tolerance, and system layout are examined as coupled design variables. Application considerations are summarized for water distribution, power generation, oil and gas, petrochemical, and low flow injection services. A worked sizing example demonstrates preliminary severity assessment, choked flow capacity, stage count estimation, and hydraulic power dissipation. The article also reviews field diagnosis, maintenance, computational fluid dynamics, patent development, topology optimization, and additive manufacturing. Final valve selection should be based on the complete operating envelope and tested coefficients for the specific valve and trim geometry. Keywords: cavitation; control valves; anti-cavitation trim; pressure staging; liquid choking; valve sizing; severe service.

Bibliography

[1] Flowserve Corporation. Valtek Severe Service Equipment. Valtek Control Products, technical bulletin, n.d.

[2] Flowserve Corporation. Flowserve Cavitation Control. Product and application bulletin FCENBR0068, n.d.

[3] SAMSON AG. Cavitation in Control Valves. Technical Information, Part 3, L351 EN. Frankfurt: SAMSON AG; 2011.

[4] Ross Valve Manufacturing Co. Anti Cavitation Solutions: WaterTamer Valve and Energy Dissipators. Troy, NY: Ross Valve Manufacturing Co.; 2007.

[5] Singer Valve. Model 106 / 206 AC Anti Cavitation Control Valve. Product catalog FC09-10; 2010.

[6] Copes Vulcan, SPX Flow Control. Cascade and Super Cascade Trims. Bulletin CV-101; 2008.

[7] Valvitalia. LTG6 Multistage Single Path Cascade Trim Control Valves. Revision 2; n.d.

[8] Copes Vulcan, SPX Flow Technology. Numbered Cascade Trim. Bulletin CV-135-US; 2012.

[9] MIL Controls Limited. MIL 91000 Matrix Series: Extreme Pressure and High Pressure Drop Control Valves with Multistage, Multipath Trim. 2014.

[10] Dresser Masoneilan. LincolnLog 78400 / 18400 Series High Pressure Anti Cavitation Control Valves. Bulletin BP78400; 2008.

[11] Singer Valve. Anti Cavitation Trim: Model 106 AC Automatic Control Valve. Product brochure; n.d.

[12] Mascot Valves. CavFlo Cavitation Control Trim. Ahmedabad, India: Mascot Valves; n.d.

[13] Valtek. Control Valve Sizing. Sizing and Selection, Section 3, Revision 6/94.

[14] Parish J. Controlling Cavitation: How a Deeper Understanding Improves the Solution. Valve Magazine. Summer 2009:1-5.

[15] Emerson Process Management, Fisher. Fisher Cavitation Control Technologies: Solutions to Cavitation Problems. Product and application bulletin D351912X012; n.d.

[16] International Society of Automation. ISA-RP75.23-1995 (R2024): Considerations for Evaluating Control Valve Cavitation. Research Triangle Park, NC: ISA; reaffirmed 2024.

[17] International Electrotechnical Commission. IEC 60534-2-1:2011, Industrial Process Control Valves, Part 2-1: Flow Capacity, Sizing Equations for Fluid Flow under Installed Conditions. Geneva: IEC; 2011. Corrigendum 1; 2015.

[18] International Electrotechnical Commission. IEC 60534-2-3:2015, Industrial Process Control Valves, Part 2-3: Flow Capacity, Test Procedures. Geneva: IEC; 2015.

[19] International Electrotechnical Commission. IEC 60534-8-2:2011, Industrial Process Control Valves, Part 8-2: Noise Considerations, Laboratory Measurement of Noise Generated by Hydrodynamic Flow through Control Valves. Geneva: IEC; 2011.

[20] International Electrotechnical Commission. IEC 60534-8-4:2015, Industrial Process Control Valves, Part 8-4: Noise Considerations, Prediction of Noise Generated by Hydrodynamic Flow. Geneva: IEC; 2015.

[21] Brennen CE. Cavitation and Bubble Dynamics. New York: Oxford University Press; 1995. Open author version available through CaltechAUTHORS.

[22] Qiu C, Jiang CH, Zhang H, Wu JY, Jin ZJ. Pressure Drop and Cavitation Analysis on Sleeve Regulating Valve. Processes. 2019;7(11):829. doi:10.3390/pr7110829.

[23] Li J, Gao ZX, Wu H, Jin ZJ. Numerical Investigation of Methodologies for Cavitation Suppression Inside Globe Valves. Applied Sciences. 2020;10(16):5541. doi:10.3390/app10165541.

[24] Sun Y, Wu J, Xu B, Bai Y. Flow Characteristics Study of High Parameter Multistage Sleeve Control Valve. Processes. 2022;10(8):1504. doi:10.3390/pr10081504.

[25] Butler B, Alexandersen J, Rao P. Capacity Specific Anti Cavitation Radial Control Valve Trims via Density Based Topology Optimization. Fluids. 2026;11(6):153. doi:10.3390/fluids11060153.

[26] Kubota, Ltd. High Pressure Drop Valve. US Patent US3917221A. Issued November 4, 1975.

[27] Valtek Incorporated. Anti Cavitation Low Noise Control Valve Cage Trim for High Pressure Reducing Service in Liquid or Gaseous Flow. US Patent US4567915A. Issued February 4, 1986.

[28] Control Components, Inc. Cascade Trim for Control Valve. US Patent Application US20150020903A1. Published January 22, 2015.

[29] Fisher Controls International LLC. Valve Trim Apparatus for Use with Control Valves. US Patent Application US20190211934A1. Published July 11, 2019.

[30] Fisher Controls International LLC. Valve Trim. US Patent US11624455B2. Issued April 11, 2023.

[31] Falvey HT. Cavitation in Chutes and Spillways. Engineering Monograph No. 42. Denver, CO: United States Bureau of Reclamation; 1990.

[32] Rao PV. Size Scale Effect in Cavitation Erosion. NASA Technical Memorandum 83533. Washington, DC: National Aeronautics and Space Administration; 1982.

[33] Kozyuk O. Hydrodynamic Cavitation. [Unpublished technical manuscript and supporting data] 2026.

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