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How to select a control valve? process fluid is hydrocarbon. then which valve to be select, globe, butterfly or ball. flow rate is 800GPM (US). decided by process.

what flow characteristic i should choose.....linear or equal%?

i know that first we have to calculate CV then we have to match with vendor specification.

want a elaborate knowledge ...if any kind person helps me ..i will be grateful to him

Thanking You
rajiv
rajiiv_kumar2000 [at] yahoo.com

We need more information.

What are you trying to control, flow, level, pressure?

What is the upstream/downstream pressure?

The valve will likely be a ball, butterflys are used for low pressure drop.

Roy

valve specifications are as below at normal flow

1. inlet pressure - 700psig
fluid - boiler feed water
differential pressure - 625psig
flow rate - 221 LB /HR
specific Gr- 0.94
viscosity - 0.3
pipe size - 1" S/160

please kindly tell me which valve to be selected if u can, sir. please show me what are the steps.