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Hello Everyone, I hope someone can give me some inputs on my following question. 25 MW motor, which has common lube oil system with a compressor and a gear unit. Supplier is saying that we will have as good properties with cylindrical bearings as with 2-lobe bearings.The cylindrical bearing...

Thank you So much again, you are correct.They pushed the speed between 2nd and 3rd CS to eliminate an impeller. Having said that, in general, what is your experience with load on/between pad?

I'm sorry, pressure is in pound, gas power is ~ 15 MW

Feed gas compressor, Methane, driven by Synch Motor, Barrel machine compressor. The two impellers are 530 mm The operating speed is 9000 rpm, motor is 1800. ISO 46 600- 900 delta P Over a million of SCFM 130 mm bearing span

Thank you so much, can you clarify more two points, why you are saying the I have a shaft with a question stiffness? Are we saying that my supplier picked a very high speed and compress the gas in two impellers only that result in super performance but very short shaft? Do I need to look at...

Hi All: I have a compressor supplier proposing 1500 mm shaft, 125 mm D, tilting pad compressor/ bearing system, runs at 9000 RPM, is it usual and acceptable to have 2 critical speeds below the operating speed and the 3rd above within undamped analysis, and when he run the damped analysis, only...

Hi All: I have a compressor supplier proposing 1500 mm shaft, 125 mm D, tilting pad compressor/ bearing system, runs at 9000 RPM, is it usual and acceptable to have 2 critical speeds below the operating speed and the 3rd above within undamped analysis, and when he run the damped analysis, only...

Hi All: I have a compressor supplier proposing 1500 mm shaft, 125 mm D, tilting pad compressor/ bearing system, runs at 9000 RPM, is it usual and acceptable to have 2 critical speeds below the operating speed and the 3rd above within undamped analysis, and when he run the damped analysis, only...

Ok..Thank you, The issue now is, If you have the Max Operating Power located at the 100% speed curve, if you applied the Affint. Laws as: ( Power@105% speed/Power@100% speed)= (105% speed/100% speed)^3.... The result Power is way above the Driver sized Power.... Does the VFD needs to have...

Hello everyone, Can each one share his experience over the selection of Centrifugal Compressor Driver size? Fixed Speed Motor, 10% above the Max absorbed POWER? VFD- Motor, should the compressor designed to deliver the Max flow at 105% speed curve? also, shall the Motor and VFD system sized...

This will be Boil off Gas Service, so, I'm evaluating Dry Recp or Laby Sulzer Vs. Int Gear.6 stage would be a dynamic problems?

For a process that can met with either 4 stages Recp Compressor Vs 6 stages Integrally Geared Cent. Compressor, can any one give me an advise with any drawback for each selection? Vibration, capacity control, cost........etc?

Hello Gents & ladies: Can anyone advise over the selection of Inelt Guide Vanes Vrs. Inelct suction Throtlling for the Cent. Compressor? how to choose either of them and based on which certain values or aspects you can go either this or this, as our process guys are open on the selection?

Hello: Does anyone know the recommended practice over choosing inlet and outlet piping to a centrifugal Compressor casing weather to be top / Bottom? I know the Maintenance to the Compressor is 1 factor, but I cannot find something firm in the API 617 proving the choice over a certain size of...

Hello Everyone, I have LP Casing-MP Casing-HP Casing of Mix Refrigerant Centrifugal Compressors for a LNG Project. I had a problem in the Mid Compressor casing. Vendor quotes a suction pressure of (19.6 bar) for this MP Casing. The Licensor requires (23.77 bar), Also due to this higher MP stage...

Right- Sire, I will need to expand my reply so I can get your / and any one want to share with an advise. Thanks Option 1: Basis of the current Design (2 separate Recycle valves on each Chare Gas and CGBooster) Discussion 1- Minimum flow thru CG booster compressor occasion will reach (affect)...

Hello, I'm adding a booster compressor to an exisitng cracked gas compressor, which one is the best? 1- Have 1 common Antisurge valve from last stage of exisitng Compressors to the first stage of the booster added, with one pressure controller for the perfromance at the inlet of the new...

Hello, Can someone verify the preferred bearing instrumentation arrangement? - Two dual element RTD's per bearing, sometimes I heared about two dual element RTD's in the "highest loaded pad" as the specification implies, or a dual element pad in each of the 2 lowest pads I understood that the...

Can you advise, what do you mean by XXS? Also, Which distances between supports?

Hello, Please help me understanding the following:- It appears in my plant when small pipings is connected to large bore piping on the discharge of a rotating equipment, the vibration stress appears to cause fatigue in the welds at the small bores? what is your advise? At what piping size (...