Thank you both for your responses.
pennpoint: It seems that the plant operators changed out the orifice plate, but I haven't been able to find out why it was changed or who decided what size plate to install. I am constantly encouraging operators, foremen, and supervisors to seek engineering...
I am a PLC programmer, not an engineer, so any help will be appreciated.
The hot oil loop in our plant uses an orifice plate to create a pressure drop. This drop is measured with a dP transmitter and sent to a PLC where the flow rate in gpm is calculated. The orifice plate has been changed and...
