Recent content by kvbalu2129

Hi danw2 Yes. I have seen all the explanations in FAQs. I wanted specifically the formulae being used in the software from Roark's, and the corrections that Miller uses. Kindly clarify.

Dear All How do i calculate the required thickness of a Restriction Orifice plate for Higher Pressure drops about 14 kg/sqcm). I have the Miller formula from the Flow measurement engineering Handbook, but I am looking for formulae (Roark's) to calculate thickness if a) the Plate is to be...

thanks chemlite

Thanks chemlite. Its running now. I have the nozzle.xls file where i am trying to find out the Outlet temperature and Pressure. How do I do it in Prode? Inlet temperature-264 Deg.C, Pressure is 50 kg/sqcm(g). Downstream is at atmospheric pressure. Hence i guess, Pout should be 1 atm. What would...

thanx chemlite. let me reinstall. i think excel is 32 bit

Windows 8 (64 bit)

thanks chemlite and GHartmann. I am unable to run Prode as there is a DEBUG error creeping up in Excel. something to do with the dll file. unable to solve the issue.

Thanks Chemlite. I would also like to know which is the correct method to be used in ASPEN HYSYS?

Hi all Could some one enlighten me on whether Beggs&Brills method is the best way to calculate Pressure drop in Steam Lines ? regards

I have been able to do both. Consistent results Thanks MortenA.

Yes, you are correct, MortenA. That's what I am doing. But the question is how big should the valve be. A Cv value would have warned me the pressure built-up upstream more accurately during the relief valve flow.

Pmatherne /MortenA Unfortunately the Relief valve vendor doesn't know "who" a Cv is. He would happily tell me the maximum relieving capacity & the Discharge coefficient. Ofcourse I know the orifice dimensions. I was trying to simulate a network with a PSV (compressible flow) and estimate...

I was looking for a rigorous calculation to arrive at a Cv value. Equation Cv = 27.66 x A x Cd would still be an approximation. ANSI/ISA 75.01.01-2002 (Flow equations for sizing Control Valves) contains a flowchart for the routine alongwith the equations.

Hi all I think a 10" tailpipe would do the job (an expander 6"x 10" at the relief valve outlet matching flange) and the back pressure would be around 4.8 kg/sqcm. Higher sizes than 10" wouldnt make any more difference. and Pray that the valve would never have to pop!!! ThanQ all, specifically...

thread1203-174188 Hi all Is there a way to calculate a Cv (flow coefficient) for a Relief Valve ? Kindly post