Pressure reduction

[davedena]

I need to reduce the pressure from a hot oil system operating at 30 psi down to 15 psi to be able to apply to a mixer. I then have to get the oil to flow back into the hot oil system which is at 30 psi pressure.

I am looking for the most efficient way to accomplish this.

 

[DickRussell]

1. Locate the mixer about 40 ft above the hot oil header (based on a gravity of 0.8).

2. Take a pressure reduction, use it in the mixer, and use a pump to put it back into the return header. If the hot oil pump suction side is only 15 psig, allowing for drop in lines, user, and control valves, perhaps you can skip the pump.

3. Find out why the mixer can't stand 30 psi oil. By mixer, I imagine you don't mean that the oil is being mixed with some other fluid (at 15 psig), because then you wouldn't put the mix back into the loop. What are the details of your application?

 

[Yorkman]

Davedena
Can you use the 30 psig oil to drive an eductor tee and draw the 15 psig oil from the mixer and inject it into the suction side of the oil pump, (I assume there is an oil pump.)
We do this all the time, on the evaporators on centrifugal chillers to return oil from the evaporator to the oil sump.

I'm not a real engineer, but I play one on T.V.
A.J. Gest, York Int./JCI