Ball Valve Pressure Loss 6

[ingenear]

At one time I had a table that listed flow coeficients versus percent open for Cameron ball valves but I can no longer find it. Does anyone have this table or something similar?

 

[ione]

It seems to be a somewhat vague enquiry. Why not contact the manufacturer that on the basis of a specific model would give the most appropriate answer?

http://www.c-a-m.com/forms/index.aspx

By the way I’ve always thought that a ball valve (I mean a quarter-turn ball valve) had to be operated fully open or closed. This item is not conceived for throttled (flow control) operations.

 

[BigInch]

Ione, you're right. They should be operated O/C when in steady state, however when conducting transient analysis involving the opening and closing of these valves, especially around pumps, flow coefficients with percent open can become an important topic.

I have a similar table and there should be little difference, if any, between ball valve manufacturers, if you're talking full ports.

"I am sure it can be done. I've seen it on the internet." BigInch's favorite client.

"Being GREEN isn't easy." Kermit

http://www.youtube.com/watch?v=hpiIWMWWVco

http://virtualpipeline.spaces.live.com

 

[stanier]

Prof ARD Thorley in Fluid Transients in Pipeline Systems provides graphs of reduced port and full bore ball valves Loss coefficient K vs. % Open.

 

[tr1ntx]

Yeah, I guess Cameron re-did their website and some stuff I found several years ago is no longer on there. I might have that info on my computer at home, I'll check later.

I have managed to find some of the old Cameron info still posted on some of their reps' sites. (Ssshhhhh! Don't let them know.)

 

[fateh123]

I am looking for similar information head loss coefficient vs percent open. Any help will be appreciated.

 

[ione]

fateh123,

You can take a look at the attached paper (pages 2 and 3). This refers to a specific ball valve, but it should be comparable with other brands as pointed out above by BigInch. Anyway the manufacturer of the valve you’re referring to, should (must) be able to provide the information you’re looking for.

 

[DLite30]

I've used this program in the past from Becker.

http://www.dresser.com/index.cfm/go/product-detail/product/BPE-Sizing-Download/

 

[ingenear]

Thank you all for your input! Please see the attached info received from Cameron.

 

[BigInch]

Thanks yourself. I would have given you mine, but I honestly couldn't find it.

"I am sure it can be done. I've seen it on the internet." BigInch's favorite client.

"Being GREEN isn't easy." Kermit

http://www.youtube.com/watch?v=hpiIWMWWVco

http://virtualpipeline.spaces.live.com