Manual para válvulas de cuarto de vuelta

Instrument Engineer's Handbook for DURCO Quarter-turn Control Valves

Flowserve Corporation Flow Control Division 1978 Foreman Drive Cookeville, TN 38501
FCD AXAMS0045-00 (AUTO-45)

Revision March 2005

Flowserve Corporation, Flow Control Division, Cookeville, Tennessee, extends its appreciation to the Instrument Society of America for its permission to adapt Standard S75.01©, InstrumentSociety of America, 1985 and Control Valve Sizing by L.R. Driskell©, Instrument Society of America, 1976. A valuable reference for further study of control valves is the ISA Handbook of Control Valves, Second Edition, 1976.

Instrument Engineer’s Handbook for Durco Control Valves
Preface This manual on control valve sizing brings together the mathematical tools required to select Durco valvesproperly for control valve applications. The equations presented for liquids, gases, and steam are based on the ISA standard S75.01 and are divided into sections to simplify manual calculation for the more common sizing problems. Examples of each type are presented for further comprehension. The selection of a correct valve size as mathematically determined depends on accurate knowledge of theactual flowing data. Frequently, one or more of the operating conditions are arbitrarily assumed. Most errors in control valve sizing are due to incorrect assumptions. Generally speaking, the tendency is to make the valve too large to be on the "safe side". Combining these so called "safety factors" can result in a valve which is oversized and one which contributes to poor control and systeminstability. There is no substitute for good engineering judgement. Only good common sense combined with experience can bring forth an acceptable solution in valve sizing. Control valve applications vary in degree from simple to complex. On occasion, guidance and assistance in selecting the proper control valve may be required.

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TABLE OF CONTENTS Topic SECTION 1 – How to Size Valves Liquid SizingGas Sizing Steam Sizing Frequently Used Formula Conversions SECTION 2 – Noise Abatement Hydrodynamic noise SECTION 3 – Cv and Torque Tables for Valve and Actuator Sizing
Sleeved Plug Valve -- G4, G4B Marathon, TSG4, TSG4Z (standard port only) Cv Sleeved Plug Valve -- G4, G4B Marathon (use for standard and V-port) Sizing Torque Triple Sealed Sleeved Plug Valve --TSG4, TSG4Z (use for standard andV-port) Sizing Torque Sleeved Plug Valves (V-port only) -- G4, G4B Marathon, TSG4, TSG4Z Cv MG4 Sleeveline Plug Valves -- Multi-Port Plug Cv Port-Seal/Sleeved Mach 1 Valve V-Port Cv Port-Seal/Sleeved Mach 1 Valve Standard Port Cv Port-Seal/Sleeved Mach 1 Valve Sizing Torque Fluorocarbon Lined Plug Valves (standard port only) -- T4 Cv Fluorocarbon Lined Plug Valves -- T4, ET41 & T43 (use for standardport and V-port plugs) Sizing Torque Fluorocarbon Lined Plug Valves (V-port only) -- T4 Cv BX2001 -- Big Max Butterfly Valves -- ANSI Class 150# Series Cv BX2001 -- Big Max Butterfly Valves -- ANSI Class 150# Series Standard PFA/Viton Seat Sizing Torque BX2001 -- Big Max Butterfly Valves -- ANSI Class 150# Series Firesealed, Standard PFA/Inconel & UHMWPE Seats only Sizing Torque BX2001-- Big MaxButterfly Valves -- ANSI Class 150# Series -- Triflex Metal Seat (70°F) Sizing Torque BX2001 -- Big Max Butterfly Valves -- ANSI Class 150# Series -- Triflex Metal Seat (800°F) Sizing Torque BX2001 -- Big Max Butterfly Valves -- ANSI Class 150# Series -- Triflex Metal Seat (1000°F) Sizing Torque BTV Valve -- Fluorocarbon Lined Butterfly Valves -- ANSI Class 150# Series Cv BTV Valve -- FluorocarbonLined Butterfly Valves -- ANSI Class 150# Series Sizing Torque BUV Valve -- UHMWPE Lined Butterfly Valves -- ANSI Class 150# Series Sizing Torque Atomac AKH3 Valve -- Standard Port Ball Valve -- FEP & PFA Lined Cv Atomac AKH3E Valve -- V- Port Ball Valve -- FEP & PFA Lined Cv Atomac CAKH3V Valve – C-Ball Standard Port Ball Valve – FEP & PFA Lined Cv Atomac AKH3 Valve -- Standard Port Ball Valve...