Capacity Temperature Control Valve

Because internal valve construction varies by manufacturer, it is best to consult each manufacturer's data sheets for the C_v (or K_v) of each type and size of valve they offer.

(This question seems identical to one about a week ago.)

I'm starting to feel like a reference librarian.

Control Valve Characteristics : International site for Spirax Sarco

Each valve will be different depending on manufacturer.

Can you not do any research on your own?

Yeah, but you're so good at it--even if it isn't the hobby envisioned in earlier days.

I suspect good literature is available from Alco, ASCO, Cash-Acme, Danfoss, Hansen Technologies, Hubbell, Jordan Valve, Refrigerating Specialties, Sporlan, and a host of worldwide valve makers. (I have no connection with any of these other than using them from time to time. This list is pitched toward my field, refrigeration.)

The sad part is, I'm not smart enough to just ignore the dorks. I think I have a superiority complex. I may have to see Vader's shrink.

I may make, "just ignore the dorks" my new tag line.

Me too! Maybe we should form up a self-help therapy group?

On the other hand, trenchancy is kind of a labor of love, a minor art form, and rollicking good fun.

I'm not sure "ignoring the dorks" is the best plan. They need negative reinforcement, which someone needs to provide....

"Maybe we should form up a self-help therapy group"

That won't work if it's just the two of us. We're both perfect already.

It's the others who need help, and I obviously don't have any patience with "them".

For now, I'll just sharpen the rapier wit and press on.

Whilst I hesitate to venture into such lauded company one rather large elephant attracts my attention

Control valves have the same capacity whatever the control algortithm / variable / function etc provided the same fluid is flowing. When you look at the manufacturers catalogue they will just give capacities based on the fluid conditions and properties.

Some valves may be labelled TCV but this will be because they fulfill a function typically associated with temp control eg throttling cooling water / flashing refrigerant, but if you had a process system in which say you throttle a large ambient temp flow of water or flash propane / ammonia the same valve could be used with a different control algoritm.

Essentially what I am saying is that the control mechanism TCV / LCV/ PCV etc is separate, external and independent of the capacity of the valve which is determined by valve geometry and fluid characteristics, properties and conditions.