I just found this particular forum by accident, even though I have been using eng-tips for several months.
I have a "disagreement" with some colleagues.
We have a 27,000 gallon liquid nitrogen tank. As part of a test I pressurized it to 70 psig, opened the drain valve and monitored the...
I have gathered a couple of things from this forum, as well as from reading.
Deadheading or low flow - BAD
High flow to the right of BEP - BAD
Ashcroft makes a differential pressure switch with 2 independently adjustable setpoints. I am thinking of using such a device on a transfer pump. I...
Does a variable speed centrifugal pump make sense as a booster for a reciprocating pump? I believe some of my colleagues are proposing such a system. Perhaps they think that a control valve and return line are unnecessary, or they believe the centrifugal pump can be made to operate close to its...
Has anyone heard of companies that make pulsation dampeners for cryogenic service? We may have a problem with acceleration head on the suction side of our reciprocating pumps.Thanks for any help or insight.
We have been running a lot of centrifugal pumps (liquid nitrogen service) through the repair shop. I began reading up on centrifugal pumps and discovered the BEP (best efficiency point). I also learned how a pump can be damaged if one strays too far to either side of this point. Here are a...
We are using desiccant dryers/scrubbers downstream of some high-pressure (2500-3000 psig) air compressors. Because the air pressures are so high, we use synthetic cylinder lubricant. We had an episode where oil was carried through the dryer, but it was only discovered by doing a condensible...
I have been reading recently about a phenomenon called acceleration head. It seems to apply only to reciprocating pumps. My question (s):
If you had a glycerin-filled pressure gauge at the reciprocating pump inlet and another gauge at the booster pump discharge could you see the pressure...
