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Hello: I would like to seek you openion about an LPG pump with single primary seal and containment seal, what is the best for the containment seal, is it contacting type or non contacting type? Also what is the advantage of each design over other? Best Regards, Sam

For 1000 PSI you will not need to have high speed pitot tube pump. The only important thing to consider is to insure to have clean fluid. This pump can not tolerate solids and will quickly errod the pitot tube. You may need to have fine mesh in the suction. Regads,

Hello All: I would like to know what is the mechanism of hydrocarbon coking in the atmospheric side of the mechanical seal. Does it happen only in hot hydrocarbon? Do we need to use steam quench for low temperature hydrocarbon in order to minimize coking? Best Regards,

I have this book "Mechanical Seal Practice for Improved Performance " it is really great one.

I would like to seek your experience about removing the throat bush or nick bush at the end of the stuffing box, when using API plan 02 in a high viscous material such asphalt. Some body claim it is good to do that and fully machine the stuffing box in order to have good venting and keep the...

I would like to ask if any body has specific experience with Pitot tube pumps. I would like to replace a plunger pump which is a nightmare for us due to its maintenance requirement, vibration, noise, etc. The flow is 20 m3/hr with a head 1600 m. The fluid is very clean water with a temperature...

I have got a chance to visit a motor manufacturer last week, and I met a design engineer who is above 60 years. His reply to this question: yes you can install VFD but you have to remember the following: 1-You will have a temperature increase about 10 deg C. So, if you are running away below...

This is an old pump. It is around 20 years old and running Naphtha. We have done a change recently, so the discharge piping will go to a lower pressure vessel. So, we end up with a control valve closing 95% and producing very high noise. If we have to trim it then we have to do so much that may...

The flow is the same which is 90 m3/hr, however the required head dropped from 28 Bars to 14 Bars due some process change parameters.

We need VFD because the present requirment for head is much lower than the design one. The alternative is impeller trimming where we have to trim too much which is not recommended. It is horizontal with coupling.

I would like to know how difficult is it to replace the induction motor for an existing pump with VFD motor. what are the things which we have to change. Regards,