Hi all,
I have an NSK deep groove ball bearing designation num 6008.This has 12 ball elements. Can anyone point out another bearing manufacturer equivalent that has the same number of balls? or more!
Secondly: We have had numerous failure of this 6008 NSK and I suspect that it may be mounting...
Hi guys,
I am in the process of obtaining quotes for cooling towers. Do you guys know what info I must give the supplier to size and select according to my needs?
So far I have:
Design heat load
design wet bulb temperature
range
Approach
make-up water
desired cycles of operation.
are there...
Hi all,
I have been asked to undertake the preliminary design of a closed circuit cooling for our turbine room (turbines and compressors) cooling water. System flow is about 12 ML/day.
Could any of those experienced with closed circuit cooling thrown some ideas about how I go about establishing...
Hi all,
I have been asked to undertake the preliminary design of a closed circuit cooling for our turbine room (turbines and compressors) cooling water. System flow is about 12 ML/day.
Could any of those experienced with closed circuit cooling thrown some ideas about how I go about establishing...
To those experienced with HX's,
An external body did a heat and mass balance in our plant where they used a HX with the following specs for a given set on inlet conditions:
Area: 180 sq metres.
LMTD: 4.6
U: 3436 W/m2.⁰C
Duty: 2823 kW.
Assume there is no fouling,
My question is: Is U a constant...
Hi all,
I am investigating the analysis of an existing heat exchanger subjected to changed inlet conditions.Somehow its confusing me. So hopefully your input will help.
here is the current config:
water/water shell and tube HX
hot water in = 90 degrees C
hot water out = 40 degrees C
hot water...
Hi all,
I have got a question pertaining to the equation used in ASME B31.1 Non-mandatory Appendix 2 where it calculates the pressure at discharge elbow exit (P1).
1.Does anyone know where this formula comes from?
2.The ASME code also tells that an alternative method should be used for...
Hello fellow engineers,
I am sizing 2 boiler drum safety valves set at 7412 kPag(drum design pressure) and 7620 kPa (1.028% of 7412 kpag). The required discharge capacities and minimum discharge area of the valves have been calculated and checked.
However, I have also been told to calculate the...
Hi All,
Does anyone know if a BSW (british standard whitworth) bolt can mate with an UNC nut or vice versa?
I looked up charts and found that the threads per inch (TPI) for BSW bolts and UNC bolts are the same for all sizes except for 1/2" size.
I would like an advice on automatic grease dispensers. It is good maintenance practice to relubricate bearings at regular intervals (months) and whilst some require very small amounts, other bearings may require over 100 grams for eg. Two methods are currently widely used: the manual grease gun...
