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i have 3.8 bar line, which valve is better if the function is opening when pressure value in the line exceed 3.8 bar? pressure relief valve or pressure reducing valve or which type of control valves?

some end users categorize the valve to groups, one of groups ESD valve.. i need to know what is the specs and standard for this product group? for my experience approval for actuators and valves separately are not considered, the approval required for ESD package but valve maker's name only will...

could anyone guide me to respectable reference for valves knowledge in oil and gas field -contain casting and forging standard/abbriviation,international standards(ASME,ANSI,API),material grades and application, functions of valves and application for each typeand most international certificates...

what MOV means exactly, is the actuator type always electrical? or we can call the valve actuated with fluid power actuator MOV also?

what the difference between MOV and ROV ?

where is triple offset butterfly valve mandatory to used in oil and gas industries ,or what is the requirements that make it prefared to be used ?

where are cryogenic valves used in oil and gas,petrochemical and power industries?

hi actually I am new in oil and gas market and i want to know where is the potential market and who are most require triple offset butterfly valve even end users or EPC's in UAE market?

where triple offset butterfly valve can be used and what the benefits to use it instead of ball and gate valve , and where in mostly needed in tank farms projects?