Importance of flowrate in shut down valve design

[SamSnead]

I filled a lot of RFQ and data sheets for valve procurement and noticed that the fluid flowrate is usually NOT REQUIRED in designing shutdown valves. I find this peculiar. Does anyone know why? On the data sheet, they request for virtually all other fluid properties, but not flowrate. I am curious as to why?

I know it's a simple question, but any assistance is appreciated.

 

[LittleInch]

Because it has no real impact on the valve design. High flow velocity can lead to high surge, but that is a system issue not a valve issue.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[OilToil]

Usually the shutdown valves are sized to not be restrictive to flow (full line size or maybe a size smaller) so the flowrate is not really relevant.