Thanks for your responses.
TX,
the beam is fixed to a concrete frame which supports the top concrete floor. If the 1" bars are used as i described (3 to the top and 3 on the bottom), the requirements of the original design will be satisfied (with respect to steel area in the different sections...
i am starting a new house project and would like some advise with regards to the design of a concrete beam.Tthe detail for the Reinforced concrete beam which sits above the garage is described below:
Beam size: 12" wide x 20" Depth
Top Reinforcement: 6x5/8" Rebar at 1/3 span to the ends of the...
I agree with Johnny Pellin. Have a look at the Cameron hydraulic data - pressure pulsation might be your problem. You also need to check acoustic design of the piping system as this can also be your problem.
Vertical turbine pumps (open lineshaft) are good for clean services and from what you say, the water should be clean. However, after some time in operation, the sump may have some build up of silt. Be careful and keep this in mind for your selection.
Artisi,
I'm looking at a TOYO recessed impeller pump - http://www.toyopumps.com/dec-recessed-impeller-vertical-cantilever-slurry-pump.php
The venting of air is not really an issue since the system discharges to an atmospheric tank. In any event, I don't intend to use any mechanical seal or...
Artisi,
i can get a pump to do the head as required.
i did look at the option of fitting a suction pipe to the cantilever pump but the lowest (normal level) liquid level is more than 8 feet from the top of the pit. Apparently, most cantilever are limited to an 8 feet length and this is with a...
Guys,
I have a bit of a stumbling block with this application. The sump depth is too much for a true vertical cantilever pump. The drawings i looked at initially indicate depths that are different from what was actually constructed, although they are 'as built' drawings.
In any event, The pump...
i"m not as experienced as you guys but I don't think this is cavitation. The area of damage extends beyond the the normal areas exhibited by cavitation damage. Would cavitation cause material removal on the outside of the impeller shroud and near the wear rings?
I think there may be something...
my desk only has a little space for a keyboard. the rest is covered with paper in a random heap. and i cant find time to attempt to clean it. but it works for me since the highest priority work always ends up on top. People have offered to clean it but i refuse their offer. i am afraid that they...
flexibox,
you perfectly highlighted my train of thought when i was troubleshooting the failure. I know the product has coke and the cyclone may not always work properly, but i was just wondering if the seal itself was contributing to the coke.
The product is quite dirty which is why i...
apsix,
I don't feel guilty. In fact there aren't many things i like doing more that problem solving. But sometimes, i envy some person's ability to forget work, after work. I just enjoy it too much and i've always been this way. even before i had an engineering degree. Most of what i do is...
I had a similar situation a few years ago when i graduated.
Went to work, met up with friends after work, went home and slept. went fishing etc on weekends with friends. Did that for about 3 years then met a great girl (She was a trainee back then) at work and I'm still together with her now...
flexibox,
Thank you for you input. The buffer fluid is shell cassida HF 32. At some point in the past we used to use royal purple GT34 but was changed for some reason (most likely capital cost).
The buffer tank operates very close to atmospheric pressure (flare system pressure of 2 psig max)...
can someone provide advice about this service?
i am having frequent seal failures with large amounts of coke buildup in all areas of a double seal. the plans are plans 41/52. coke was found in the primary and the backup seal bellows,faces, pumping ring, gland ports etc.
the product is cooled...
thanks electricpete, i read this article some years ago. strangely enough, 90% of the pumps i have seen with oil rings exceed the D*N limit.
anyways, the article had no mention about disadvantages of finger discs and i never heard of anyone having bad experinece with them. so, i was just...
ccfowler,
i don't believe that we have the luxury of a readily available source of clean water. but, i will look into your suggestion and see if its practical.
Artisi,
the goulds designs i've looked at in their GPM catalog can't provide the head required for the applications. the shearpeller...
Artisi,
I checked out warman. their recessed impeller design cannot provide the head for the services. they do have a couple designs such as the double suction seal-less open impeller which looks interesting. i don't know if you or anyone has any experience with that design. my concern would be...
Artisi,
Many different designs were tried in these services in the past - diaphragm, piston, self priming centrifugal, vertical turbines. Back then, i was still in school but from the data i have, all these designs performed poorly with Mean time Between Repairs ranging from 3 months - 9 months...
