Hi Everyone,
Fire water system in refinery normally has large pipe lize (more than 20"). For any bigger size valve installed in the fire water network , do we need to have these valves gear operated for facilitating operation or anybody could operate a fire valve manually without requirement of having gear.
Please advise.
Also, OS&Y is specified for all fire valves . Apart from gate valve are there any other valve of this category (OS&Y)? Please advise.
Regards.