Dear JJ,
Thanks for your to-the-point response. It just shows that we are not alone in dealing with this poor reliability of these pumps. The vendor is happy booking the spare parts business and (gleefully) does R&D works on our pumps.
We took the same path as you guys: Changed gears to...
Very little instrumentation is available in terms of measurement. "Not delivering the required head" is reported by the operators, who switch to the (identical) standby pump.
Regards
We have a pump (high temp service 350 deg C)- sp gr 0.8; flow: 160m3/hr' diff head: 35 mts; etc.
This pump had a history of bearing failures. A decision was taken (after due consultations with OEM, i guess) to drill balancing holes in the impeller to reduce loads on the bearing.
After...
WE have an existing sour water pumping application (25 m3/hr; 140 bar differential pressure) using sundyne pump (LMV331) at appx 18000 rpm, dual pressurized tandem seals (pusher balanced design) with chemraz O rings/ C vs SiC faces.
We have have had a series of problems with these pumps since...
Hi Bobstak. Can you plesae elaborate more on the micorwave technique. Is it applicable for paint based ceramic coating too? I have to take the exchangers half way across the globe to reach Houston - for checking :)
Regards
Thanks to all for sharing the information. Looks like we have a pereference for horizontal pumps vs the vertical.
Jet, thanks for useful info on the vendors and eqpt. What is the capacity of each pump. Is space not a constraint in your plant? I looked at pump catalogue; 6.5mx3.5mx2.5tms...
Well, I guess the weekend has got our cermic forum members to take some rest. In the meantime I did some research and came to learn about HVOF (high vel oxy fuel) coated ceramics.
Anyone having experience with HVOF ceramics in industrial environment (Refiner, petrochemicals, etc). Is it cost...
Dear All,
Sorry for laziness - I didnt do due diligence on researching this subject. I hope members would be forgiving and kind enough to provide useful tips.
We are going to apply ceramic coating for internals of CS bonnets of our sea water exchangers. I want to know if any special...
Dear All,
We are in concept development stage of a cooling water tower (fresh water). I am of the opinion that a cooling tower with extended basin to incorporate vertical turbine pumps (about 5 nos of 10,000m3/hr ; 35mts head) would be better. Other view in our group is that perhaps Horizontal...
Dear All,
Has anyone used auto-recirculation valves in their pumping systems (see Tyco website: www.tycovalves-na.com/ getlit.asp?lit=ld/YAWMC-0418-US.pdf ). In our plant we use continuous minimum flow for small capacity pumps; for high capcaity pumps, we have a flow control valve to take care...
Thanks for the post van. I just explored things a bit.
1) In our industry we have the non slam check valves by Eagle Industry Co Ltd. They call it "Free Flow Reverse current valve with Oil Cylinder"! In principle it is a normal swing check valve and the hinge pin extends beyond the body to...
Dear All,
I just want to know what is the action of a non-slam swing check valve. My understanding is that it is non-slam in one direction (i.e. when the disc slams against the body during opening) and that the non-slam action arises due to the opening of the disc in a direction of compression...
Dear All,
In our plant we have Alumunium Plate fin exchangers and currently we are experiencing leakage. trying hard to locate a specialist supplier (Singapore or around in the region). Can any one guide me how to locate a specialist supplier in this region.
Would also appreciate if some...
Dear All,
In our plant we have Alumunium Plate fin exchangers and currently we are experiencing leakage. trying hard to locate a specialist supplier (Singapore or around in the region). Can any one guide me how to locate a specialist supplier in this region.
Would also appreciate if some...
Electric Pete,
A good imagination and a good example.. I can vaguely correlate this analogy to the problem that might be occuring (although in a much more complex way). It will be interesting to see if someone has worked the maths based on your analogy.
Regards
