Blanket gas PVC design

[10815L]

Hi,
I'm designing a PVC for tank blanket gas, total flow is 250m3/hr. should I design PVC for hundred % flow or less. Flow through RO is 250m3 /hr at1psig.
Thanks
10815l

 

[europipe]

PVC=polyvynilchloride?


I think You mean a PCV?

You must design for 100% or more, otherwise You can create a vacuum
The control valve regulates the flow.

 

[10815L]

You are right, I mean pressure control valve, spelling is changed by automatically.
Thanks
10815l

 

[LittleInch]

Thought it was pcv. Normal rule of thumb is not to run a pcv past 70%open at max flow otherwise controllability becomes difficult. Not sure where the ro comes into this.

My motto: Learn something new every day

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

 

[10815L]

RO is in case malfunctioning of Pcv or prcv.
Thanks
10815l

 

[LittleInch]

Sorry, still doesn't make sense. An ro is a fixed position control valve in essence so if in line will interfere with pcv operation. Max flow will be the max flow through pcv at 100% open. You need to sketch this out and post it.

My motto: Learn something new every day

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