IEC 60534-2-2:1980
Industrial-process control valves.. Part 2 : Flow capacity. Section two - Sizing equations for compressible fluid flow under installed conditions

Standard No.

IEC 60534-2-2:1980

Release Date

1980

Published By

International Electrotechnical Commission (IEC)

Status

Withdraw

Latest

IEC 60534-2-2:1980

Replace By

IEC 60534-2-1:1998

Scope

This section of Part 2 covers equations suitable for use in sizing industrial-process control valves when the flowing media are compressible fluids. At very low ratios of pressure differential to absolute inlet pressure (?plp1)@ compressible fluids behave similarly to incompressible fluids. Under such conditions the sizing equations presented in this section can be traced to the basic Bernoulli equation for Newtonian incompressible fluids. However@ increasing values of ?plp1 result in compressibility effects which require that the basic equations be modified by appropriate correction factors. The equations presented are for use with gas or vapour and are not intended for use with multiphase streams such as gas-liquid@ vapour-liquid or gas-solid mixtures.

IEC 60534-2-2:1980 history

• 1980 IEC 60534-2-2:1980 Industrial-process control valves.. Part 2 : Flow capacity. Section two - Sizing equations for compressible fluid flow under installed conditions

IEC 60534-2-2:1980 Industrial-process control valves.. Part 2 : Flow capacity. Section two - Sizing equations for compressible fluid flow under installed conditions was changed to IEC 60534-2-1:1998 Industrial-process control valves - Part 2-1: Flow capacity - Sizing equations for fluid flow under installed conditions.