Compare this to large pumps that we install on skid frames, without concrete mass to hold things down!!... Hmmm. Pump vibrations are not that great anyway so providing the connecting pipework is well supported and protected, all should be fine.
Running the pump at this slight angle will not cause any problems. Pumps are designed to handle axial forces. And guessing that the subsidence should cease after a while.
Plunger pumps too expensive for this duty? Just worried about the variability of flows, and accompanying NPSH issues if only one of the two / three pumps is operating. We are at altitude (4500) and low atmospheric pressure brings the NPSH evaluation to the forefront a bit more than other...
TenPenny, good pump curve, thanks. Exactly the duty. Looking at the curve I see that NPSH requirements are very high if we are running just one pump (parallel pumps) and out to the right on the curve at say 32-34 lps. Given our high altitude project of over 4,400m we will have issues at 20...
littleinch.. thanks, but after 1hr trying I can´t get the launch to work without it defaulting to a pdf file instead of the java thing. I´ll keep trying different things.
Hi
Anyone have a multi-stage horizontal water pump curve you could post here without too much effort? I am having trouble finding something on google and this medium will be quicker than waiting for next week to ask suppliers. This follows my earlier post re well water. Final system design...
Some great comments from you all and has helped a great deal, even towards put the correct phrasing in a project memo. Such is the value of good discussion "over a coffee".
all the best.
TenPenny... the pipe runs along a valley next to a dry creek zone and it do not want to entertain intermediate pumping given the diesel generator requirements with associated costs.
LittleInch...great comments. You have grasped this well. The fresh water demand for the new minerals plant we...
Greetings Earthlings,
Question about pumping 130 m3/h along a 12 km pipeline, clean water, TDH will be about 430m (static is 300m), minesite application. Pipeline diameter will be 8". Any recommendations for type of pump or system of pumps? Keep in mind that the plant consumption...
Loo Kim,
When the tank runs low the pump will pump a mixture of air and water. Therefore the pump curve does not apply exactly. Many pumps, like sump pumps run on low water levels and end up pumping air and water. It's not cavitation as there are no high suction pressures. It's just what we...
Jimmy, you are a good intern who is trying his best to provide good field data. Well done. This is an interesting brain teaser, particularly when you keep feeding us new info. Beware of plant technicians input. It seems that this system should/could be running using one pump and 2" valve...
Thanks for the well thought out responses. I'll take the comments on board and make some further reviews. I am really liking PC option even more. Regards
I should add that the 15,000 m3/h example was five pumps operating, not one!... just to... you know, make sure people stay calm through these difficult times.
hahaha. So interesting to see the different calibre of responses. Dubmac, I think you appreciate that this is not so straight forward as some suggest. Two stage split case, could be. Location for these pumps is 1200m underground pumping/"lifting" up to the main GEHO pump station for the main...
Bursting disks are not a good solution in many of our simple PD pumping operations. There is normally no great potential for harm to people. Relief valves are better solution. No valves on these lines is best. Interlocking of valves with limit states is required. Do not start pumps until...
Question re mine dewatering pump options. Looking at suppliers/models/single stage centrifugal/multi-stage. We have an underground transfer pumping duty. Flow rate is approx 100m3/h. Head will be in the order of 120m to 130m. Currently the lads are looking at sulzer centrifugal. Mine is...
Vendor is not an engineer and has never been asked these foreign questions before. That's ok. You buy his pump skid. Assume that NPSH is not an issue in this instance (which it won't be for a dosing pump), and do you own determination of DP / power calc (and no, it's not just the difference...
I agree with the assumptions made by a couple of our learned commentators above that restricting the flow will be the only solution to tripping problems. Higher flow will require higher power. Nothing is for free, no magic, except if you improve impeller efficiency. "Chasing" the power drop...
Mr Project Engineer, please be more specific about your issue. There is no value in us trying to such a question. More data required. And what do you do?
