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josej
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Join Date: Mar 2008
Location: Mumbai
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Good Answers: 2

Valve Exit Vlocity

07/08/2008 6:42 AM

Hello Frnds

1) Can some one receomend wat should be ideal exit velocity of control Valve , if flowing media is acid gas ( so that downstream piping will not be impinged )

2)Is PTFE suitable for maintaining fugitive emission norms , I have consulted vendor , but not gottta definite answer

.

Regards

Jose
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: Valve Exit Vlocity

07/08/2008 7:05 AM

Please describe the gas, its temperature and pressure, and the materials-of-construction of the valve and pipework.

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josej
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Join Date: Mar 2008
Location: Mumbai
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#2

Re: Valve Exit Vlocity

07/08/2008 8:40 AM

Moc For valve IS ASTM 216 GRADE WCC pipeline moc is Carbon steel

Temp 100 DEG F

pressure is 12.9 psig

Application is acid feed gas ( sulfur recovery unit )

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Jos
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TexasCharley
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#3

Re: Valve Exit Vlocity

07/08/2008 10:36 AM

I beleive the question to be a bit incomplete. Certain gases will react with certain materials differently. ie sulfur to carbon in your example - but sulfur what? H2So4, C0S, CS2, H2S etc.

It sounds like maybe you are in a refinery?

I (and correct me anyone) am not as interested in psi so much as I am in reactivity of materials. We have countless gases and chems which we flow at often quite high pressures through stainless steel tubing without concern.

Again I might be sifting the apple cart looking for an orange......

My limited refinery experience was surrounded with black iron piping and sulfur based gases which were maintained at 10-15 psi for exhausting purposes.

As for PTFE: I know that companies such as Parker, who manufacture PTFE components for valves and compression type fittings also produce reference/compatability charts. Most of which that I have seen are pretty inclusive.

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josej
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Join Date: Mar 2008
Location: Mumbai
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#4

Re: Valve Exit Vlocity

07/10/2008 12:33 AM

Thanks for providing info

Regards

jose
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