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Guys, what's injectable packing ? Where it should be used ? What are its advantages and disadvantages ? Regards, Abualnassr

Hi guys, We have an agitator with these parameters : T = 210 C P = 18 Barg The seal installed is EagleBurgmann HSL double seal. The plan used is Plan 53A, are the process parameters OK with the 53A ? Or it's recommended to upgrade the flushing system to 53B ? And, what is the max. temp. &...

Hi guys. I'm trying to calculate the polytropic head for a centrifugal compressor using this equation H = (1545/Mw)*Z*T1*(n/(n-1))*((P2/P1)^(((n-1)/n))-1) Where, Z = 0.996 n = 1.32 P1 = 16.87 PSIA P2 = 23.29 PSIA T1 = 740 R Mw = 68.5 My calculated H = 5579.62 ft But, according the OEM data...

Hi guys. How can we measure the backlash without disassembling the gear for the gearbox ?

Hi. When we were overhauling a centrifugal compressor which is connected to a motor through a speed increaser (gearbox), we noticed when we opened the gearbox cover that there as some melted metal on the shaft just underneath gearbox labyrnith seal of the high speed shaft (5800 rpm). Why would...

Hi guys. Is it possible to calculate the radial loads on an overhung centrifugal compressor's journal bearings ?

Hi. Guys, what might be the effects of using a higher viscosity lube oil ? I mean, if the OEM's recommendation is to use an oil with 150 SSU @ 100F and if you have to use an oil with 210 SSU @ 100F. What do you think might happen ? Regards,

Hi. What are the consequences if we need to increase the current parameters in an over-hung centrifugal compressor as the following : P1 = 0.15 Bar -> 0.5 Bar P2 = 0.60 Bar -> 0.8 Bar These changes will be done by installing some constrains in the lines. So, what do you think, will these...

Hi. In our plant DCS there's always current (amps) icon associated with each motor. What does this current value gives me ? And, how can i know the max and min amps for any motor ? Regards,

Hi guys. We were trying to check a centrifugal compressor's gearbox for any degradation. I've noticed that the journal bearings of this gearbox became very sticky due to oil, also the internal components of the gearbox were all very sticky. What is the cause for this stickiness? ? Knowing...

Hi all. I work in a chemical plant as maintenance engineer, and i'm looking forward to change my career to reliability engineering. So, from your experience as reliability professionals what are the basic steps, training & knowledge that i should acquire ? Appreciate your help & feedback...

Hi. I have simple question, why we calculate MTBF & MTTR ? Regards,

Hi. We have a GE blower with the following specs: dp = 0.5 Bar Capacity = 7060 m^3/hr Impeller material is SS403 Speed = 5800 rpm Suction Temp = 138 C Discharge Temp = 208 C Brake Horsepower = 234 HP Gas is Chlorine But, the process is higher than the equipment specs where capacity is actually...

Hi. I have a over-hung centrifugal fan with : Volumetric flow rate = 4400 Nm^3/hr Dp = 0.07 Bar Speed = 3273 rpm Power = 25 KW This fan is supported with 2 double-row roller bearings. How can I calculate the reactions on those 2 bearings and make sure the bearings are selected properly ...

Hi. We have a centrifugal compressor (blower) that handles chlorine gas. The process temperature at the suction is about 200C but when i looked in the manufacturer's manual i found that the design suction temperature is 138C. So, is this can cause failures ? Some of the failures are: 1 -...