6 replies to this topic

[Vegeta]

Dears, 

 

Can you help me in filling the process data sheet of a pressure control valve? what information I will need? and what calculation shall I do? Sorry for any inconvenience... This is my first time to do this!!

 

The case I have include one booster pump feeding a shipper pump that delivers the crude oil to somewhere that is far i.e more than 100 Km length. Note that all pumps in the system are existing. 

 

Regards,

[Vegeta]

The control valve is on the shipper pump discharge line... Sorry 

[Bobby Strain]

You should use GOOGLE to search for the datasheet. Seek and you will find.

 

Bobby

[Art Montemayor]

The attached Data Sheet is furnished for your use.  You should fill it in.

 

 Arts Control Valve.xls   66.5KB   184 downloads

[latexman]

Most operating companies have all kinds of datasheets.  If not, their contract Engineering firms do.  If not, take a look at PIP datasheets.

 

Also, what did your mentor or peers say?  Surely, you have a mentor and peers.

[Padmakar Katre]

 

Hi,

In case of control valves in liquid service, these are mainly in pump circuit or not pump circuit. Since you have mentioned the control valve in pump circuit, get the pump details too such as capacity increase if any, resultant head requirement on account of increased capacity and the extra pressure to be killed in control valve. Check the different operating scenarios such as turn up and turn down and estimate the pressure drop in control valve. Major parameters in the control valve datasheets are,

1.Delta P at max flow

2.Delta P at min flow

above two inputs will decide the Cv of control valve where as below inputs too required such as,

1. Design pressure or pump shut-off head

2. Inlet P, T and density, viscosity

3. Special requirements such as tight shut-off, limit switch, fire safe, hand wheel etc.

 

Request to go thru Art's attachment which is very useful.

[Vegeta]

Hi,

The data sheet that I have is somehow similar to Art's attachment. My mentor said that I have to perform a hydraulic calculation to determine what Katre said in his reply. However, it seem that the control valve needs to take a huge pressure drop (more that 300 psi) . What do you think? Any advice?

Thanks & Regards,