Search found 16 matches

by manu
18 Sep 2019, 19:02
Forum: Technical discussion
Topic: Airlift pump calculation
Replies: 6
Views: 948

Re: Airlift pump calculation

Have some good news. After some search and reading about theory I went back to this excel sheet http://api.ning.com/files/5sXTPNNd5jk1j4oiNb*g-NmoSj78xSDLFH3yn-GInB*e8FSzGAYbkDau37s2zAqopSzFjX5gsTN5r0Ikrmgv6-GIcY9xsWi3/airlift_basic_calculation.xls I validated finding on this document in page 6 usin...
by manu
16 Sep 2019, 01:02
Forum: Technical discussion
Topic: Airlift pump calculation
Replies: 6
Views: 948

Re: Airlift pump calculation

Hi Ted, It is a swimming pool and can handle intermittent use by less than 5 adults.it may be able handle more regular use when the filter get mature over few months to an year. I am still in designing phase. So there are two possible ways of using a percolating filter from bottom up and top down. B...
by manu
15 Sep 2019, 14:28
Forum: Technical discussion
Topic: Airlift pump calculation
Replies: 6
Views: 948

Re: Airlift pump calculation

Ted, Yes,you are correct the main use of airlift is volume flow and not to create a pressure head or lift water. Being said that they can create pressure head of 1 feet without much issue but the compromise being reduction in flow rate. Initially I was planning for a massive flow rate too with tradi...
by manu
14 Sep 2019, 09:13
Forum: Technical discussion
Topic: Airlift pump calculation
Replies: 6
Views: 948

Airlift pump calculation

I am looking for a pump that will deliver 8000Litter per hour of water to a height of 30cm. It is important to limit flow rate to 8000 as it will exhaust the wetland filters ability I am using otherwise. Pool depth of 182 cm and could be increased if needed. Airflow is fixed at 1.2CFM(2.1 METERCUBE ...
by manu
04 Aug 2019, 03:17
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 2282

Re: EPDM tube diffusers

Any updates Pssymon?
by manu
23 Jul 2019, 12:27
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 2282

Re: EPDM tube diffusers

Frank wrote:
23 Jul 2019, 08:44
The results are partly contradictory.
Looks like it. is it because it was done at different times with different air pumps ( same model)? Perhaps pssymon may know?
by manu
23 Jul 2019, 01:40
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 2282

Re: EPDM tube diffusers

Frank wrote:
23 Jul 2019, 00:07
My interference is to do own tests. :wink:

Best regards,
Frank
Well,That is one way. But the wise way is to learn what Others have done and failed too. ;cool;
by manu
21 Jul 2019, 22:32
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 2282

Re: EPDM tube diffusers

I know it’s not efficient , noisy and more expensive but other options are not available in India. Also diaphragm pumps like secoh may not survive the hot humid weather of tropics as well as they do in Europe. Now if I try to explain with what I learned from this forum. From here https://www.airlift...
by manu
21 Jul 2019, 12:04
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 2282

Re: EPDM tube diffusers

Thanks guys. So I purchased a pump from Gast (Gast 1531) https://gastmfg.com/products/compressors-and-pumps/rotary-vanes-motor-mounted/1531 which can support a flow up to 2.1 m3/hr and upto 15psi(330 mBar). My understanding is, with a higher diameter pipe it needs a higher airflow to work properly. ...
by manu
19 Jul 2019, 10:12
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 2282

Re: EPDM tube diffusers

Hum,finding it difficult to find the reducers from 245mm to 110 mm. Anyone know a source that make a 6 inch diffuser (150 mm)? :dash:
by manu
18 Jul 2019, 03:05
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 2282

Re: EPDM tube diffusers

Frank,
Sorry , did you mean 245 mm is enough?
by manu
17 Jul 2019, 12:30
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 2282

Re: EPDM tube diffusers

Thanks Frank. Thats helpful. also the data sheet support disk "in contrast to the tube diffusers, the entire diffuser surface is on the same hydraulic level, the gas through put is even across the entire membrane surface and control range. As a result, both the service life and performance are optim...
by manu
16 Jul 2019, 20:15
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 2282

Re: EPDM tube diffusers

Frank, This is a disk diffuser but what I meant was this.They are tubes. I looked for proper design with the disk and could not find any. Then came across tubes seems attractive as they fit inside tubes easily in theory. But dont know how to do it. https://www.oxyflex.de/en/produkte/rohrbeluefter/ox...
by manu
16 Jul 2019, 14:20
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 2282

Re: EPDM tube diffusers

Hi Frank,
Thanks for your input. Can you please provide some details perhaps a drawing?
I read EPDM add bit more pressure to the system and have to factor in that while looking for pump. Any ideas?
by manu
15 Jul 2019, 14:50
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 2282

EPDM tube diffusers

Hi,
Has anyone used EPDM tube diffusers in airlift pumps?
I have seen some reference about using disk diffusers,but did not see any actual designs. Tube seems like an easy and attractive option.
But installing a pipe(tube diffuser) inside the 110mm pvc pipe may need some skills.
Any suggestions