Good, you need to be concerned about cavitation and vortexing !! Often pump manufacturers will have a design guide (usually far to the back - Marsten Pumps(?) I think has a good one) for the the intake design. The Hydraulics Institute and pumping station design books should also provide some...
I have designed several "flow splitting" manholes in a parallel interceptor situation. One of the situations involved designing a vault with one pipe entering and two exiting; one of the pipes already existed and its parallel "twin" was to be constructed as part of the same project. Flow...
Wow. That would be poor potable water quality if you have to retreat it via osmosis ... hope you're not paying much for it. Seem as though the original purveyor should improve their treatment. Water age is not necessarily a direct link to seriously degraded quality, but it's an indicator of...
CarlB hit on one problem and that is related to maintenance operations that will be conducted from the manhole. Another stems from the ownership of the service laterals and making service connections to "the main." If the building owner is responsible for the entire service from its...
Manufacturer's data will often list the number of turns to open the valve along with the required torque. You might have to dig a bit, but it will be there. bimr has the formula that should apply also, particularly for AWWA rated valves; but most valves have that rating now days.
swearingen,
jpankask has summed it all up. But you need to know the "other why" the people are leaving. Money yes, but what else? Ask them. An "exit interview" that's sincere and meaningful should shed some light. People leaving a firm is a fact of life, but whole-sale evacuations likely...
unclesyd,
Stealing intellectual ideas/ property is a problem many engineers will face. While I am not familiar with your entire situation, it seems to me that you have occasion to "confront" the president of the company who seemingly stole your idea. You worked for them in the meeting, showed...
biswanath,
I am not an open channel expert, but I agree with cvg that HEC-RAS might be a better choice for modeling an open channel (I am not familiar with Fluent). What is the application of the open channel you are attempting to model?
In both upcoming cases, suction piping will enter the pumping station from below grade. At the point of entry, the suction piping manifold could obviously accommodate various configurations for the HSC or VT pumps (clearwell or cans). My colleague is confident that the pump's NPSHR can be met...
Two situations, both municipal treated potable water, fed by a gravity tank, one discharging directly into a residential area distribution system, and the other discharges into a several thousand-foot long transmission main before that pipeline connects to a residential area distribution system...
(I probably should have posted this question in this forum first)
Can anyone steer me to a good resource that actually lists pros and cons of horizontal split case centrifugal and vertical turbine pumps-specific not just general? I'm primarily interested in operations and maintenance...
looksatstars,
Sounds as if you are alluding to possible water pipeline corrosion from stray currents from the electric line affecting the water line. I'm definitely not an expert in this field but it's wise to be concerned. Are there any forums here that have corrosion engineers?
BigInch...
Camell,
What about the supply side? Does the mine's water supply have a meter that records flows at a interval that would/ might give you insight into the maximum demand flows? If not, you might be able to rent a flow meter, temporarily install it, and record flows over a representative period...
adamp003,
The equipment estimate sounds somewhat low to me, also ... even for a very basic system; you've got a rather wide relative cost spread. As long as you list out all of the components and know the quality you're after, you should be OK (a third quote would be nice). Be sure you're...
sant007,
CI pipe can certainly be restrained. Bell clamps and tie rods work for both DIP and CIP. I guess you're suggesting using MJ restraint glands (mega lugs if you will) for the side with new DIP but don't want to use them on the older CIP. That might be a good choice, but the material...
adamp003,
Wow ... so many variables in making an "opinion of probable cost." Your location matters. Your equipment supplier for the package lift station should be able to provide materials costs and likely direct you to a contractor or two. You could use Means. Is the wet well cast-in-place or...
notsocivil,
I might not understnad your model set up, but generally you would not use the fire flow results as the flow input to your distribution system at that node. You need to know where the system is supplied and how. In suggesting a "tear-drop" shape, are you saying that you have only...
colum,
If there is a fire department around, talk to them. If there is no fire protection now, the fire department will likely be thrilled to get almost anything. 1,000 gpm to 1,500 gpm is really considered the minimum now days. 2-hour durations are in order for these flows; if higher flows...
acmish
First of all, be careful if you're moving out of your field of design expertise; maybe you should refer the work to another designer with the needed skills. If you're designing a subdivision you'll need to conform to the standards of the entity having jurisdiction over the approval of...
Can anyone steer me to a good resource that lists pros and cons of centrifugal and vertical turbine pumps-specific not just general? I'm primarily interested in operations and maintenance, performance, efficiency, space requirements, ease of operation, bearings, motors, wear, repair...
