V-Ball Or Trunnion Ball valve ??????????? 2

[fernasp]

Our company is one of Valve supplier .
As received inquiry from one of our clients,‎
We need the one control valve for controlling flow in plant, ‎
But as below situation we need your consulting technical in true equipment choice,‎
Situation: ‎
In this case we need to Control flow and this is necessary flow don’t have low pressure drop ‎in ‎flow way, ‎
It should be noted because the fluid is sticky and dense, so there is valve possible stuffy the ‎port‏.‏
So kindly please recommend me the best choice for control valve as material and type,‎
Let me know, do we need V-Ball or with trunnion ball valve is possible controlling this ‎flow.‎‏ ‏

WTR/TA/HB(S)‎ FLUID
‎185‎ FLOW RATE (M3/H)‎
‎87‎ INLET PRESSURE(BAR.G)‎
‎87‎ TEMPERATURE (c)‎
‎3.5‎ DIFF.PRESSURE (BAR)‎
‎4"‎ Pipe Size

 

[gerhardl]

For some very simple regulating applications a normal (trunnion mounted or floating as fit) ballvalve could be used for regulating. Personally I would nver recommend this, as the risk of cavitation or excessive wear and a very unfit regualation curve is great.

A V-port ballvalve is often used for difficult media, often steam, thick fluids or fluids with high dry particle content, and can give in circumstances bettter total peformance than other regulating valves for the same problematic fluids.

I have not controlled size/flow for your data.

Check problems if the fluid when dry give glue-like deposits requiring special cleaning or flush-through when stopping or starting.

 

[fernasp]

dear , thanks for you quick replay ,
i can send to you flow data sheet if you need,
and please recommend to me which type valve is better to use ,
also valve size is 4 inch , class 900 ,
and imust say you , after working more time , valve port is blocked due to a high concentration of the fluid.

 

[zdas04]

You don't seem to know the difference between a control valve and a block valve. A very dangerous situation for a "valve supplier".

A trunnion (or floating for that matter) ball valve is an on/off or "block" type device. The valve position vs. allowed flow graph is very non-linear and it will allow 100% of flow at somewhere around 20-40% open. These valves should never be used by a designer in a flow-control scenario (sometimes the field guys find themselves in a situation where the only valve available for flow control is a ball valve for a one-off requirement, but the designer shouldn't ever put in a ball valve specifically for flow control).

Valves appropriate for flow control include globe valves, V-Ball valves, and chokes of various technologies. These all have valve position vs. allowed flow graphs that approach linear. The Fisher V-Ball is one of the best, but also one of the most expensive members of this class of valve.

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
The plural of anecdote is not "data"

 

[fernasp]

dear friend , i know difference between trunion ball valve with control valve!!!!
my question is about V PORT ball valve,
i told with my fluid is dense , actually i am looking for manufacturer V-Port Ball valve ,
if is possible please let me know more producer V-Port ball valve in Asia or middle east .

 

[DRWeig]

Fisher is part of Emerson, they should be available around the world. Their patent on the V-ball expired almost 8 years ago, so there should be many makers. I bet Schneider, Siemens, and Honeywell have one by now.

I know there are at least two in South Korea -- but I don't remember their names.



Best to you,

Goober Dave

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[fernasp]

dear friend
thanks for your following my question,
how can we have contact
do you have skype ID?

 

[DRWeig]

Hi again, fernas.

I'm feeling overly generous this afternoon. Click away below for contact info. If you need more, put this in Google:

"segmented ball valve" slurry

Be sure to keep the quote marks ("") around the first three words but not the last one.

Emerson Fisher:

http://www2.emersonprocess.com/en-US/contacts/Pages/ContactUs.aspx

Allied Warren:

http://www.allied-grp.com/contact-us

Triad:

http://www.triadprocess.com/contact.html

Samson

http://www.samson.de/page.php?sp=en&lh=l13&ll=l69&ti=Worldwide&bo=contact/en-world.php

VSI:

http://www.valvesolutions.com/contact.html

Flowserve Valtek:

http://www.flowserve.com/Contact-Us

Cowan:

http://www.cowandynamics.com/contact_info

Best to you,

Goober Dave

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[fernasp]

and how can i select angel V Port???

 

[DRWeig]

You are looking for an angle V-port valve?

If it's the angle of the V notch, you don't have a choice.

I have never seen anything like that... Maybe someone else can help.

OR, you can contact those companies in the links in my previous post.

Best to you,

Goober Dave

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[DRWeig]

Sorry, I didn't think of the angle of the V notch. I wouldn't know how to choose that either -- I would contact the manufacturer for selection criteria.

Best to you,

Goober Dave

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[2mainer]

Gentlemen, Please see link.

http://www.a-tcontrols.com/download/pdf/VM.pdf