Converting air failure position for valves

[helpyou]

HI

Is it possible to convert fail close control valve to fail open control valve. Valve already installed at site.

Your comments please from experience.

 

[mk3223]

What's the construction of this CV,i.e. valve type, actuator, etc?
Or, may consult with the CV Vendor for a recommendation.

 

[bcd]

Maybe. It depends upon the actuator that is installed. Some brands / types can be converted from fail close to fail open with no additional parts or pieces. Some cannot. Check the manufacture's catalogs and maintenance documents.