Take control of control valves

Here's a six-step plan for using the Instrument Society of America's (ISA) standardized procedure to size control valves for compressible flow, ISA es tablished a committee in 1961 to develop standard control valve sizing equa tions, Their efforts culminated in a procedure that has achieved the status of American National Standard, Later, the International Electrotechnical C ommission (IEC) used the ISA works as a basis for international standards, Except for some slight: differences, the ISA and IEC standards have been ha rmonized.