Search found 54 matches

by Frank
23 May 2020, 23:34
Forum: Technical discussion
Topic: Airlift pump calculation
Replies: 10
Views: 2417

Re: Airlift pump calculation

These airlifts are not efficient and expensive. :nono:

For example, I pump 60.000 l/h water with 140 l/min air and 76 Watt.

Frank
by Frank
19 May 2020, 14:10
Forum: Technical discussion
Topic: Airlift without 90 degree bow
Replies: 2
Views: 1462

Re: Airlift without 90 degree bow

Air and water will go in all directions, 360°. Is this really less efficient?

Frank
by Frank
04 Nov 2019, 23:02
Forum: Technical discussion
Topic: Airlift without 90 degree bow
Replies: 2
Views: 1462

Airlift without 90 degree bow

Hello all,

who has experience with an airlift without 90 degree bow?

app.php/gallery/image/55014

Regards,
Frank
by Frank
23 Jul 2019, 08:44
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 4985

Re: EPDM tube diffusers

The results are partly contradictory.
by Frank
23 Jul 2019, 00:07
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 4985

Re: EPDM tube diffusers

My interference is to do own tests. :wink:

Best regards,
Frank
by Frank
21 Jul 2019, 22:07
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 4985

Re: EPDM tube diffusers

The Gast 1531 seems not to be the best, because the air pump is not efficient. Why that one?

You could use a 160 mm airlift supporting up to 40.000 l/h.

Regards,
Frank
by Frank
20 Jul 2019, 23:02
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 4985

Re: EPDM tube diffusers

Yes, the disc airlift are good for high output. At my pond I move 65.000 liter per hour with a 250 mm (10 inch) diameter airlift and 90 watt. Even more than 100.000 liters per hour would be possible with disc airlifts. But for a 110 mm pipe it's easier to drill the holes into the pipe instead of usi...
by Frank
20 Jul 2019, 19:49
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 4985

Re: EPDM tube diffusers

For a 110 mm airlift I would not use a disc. Drilling holes is the better way here.

Best regards,
Frank
by Frank
18 Jul 2019, 10:57
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 4985

Re: EPDM tube diffusers

Yes, the 245 mm disc is fine.
by Frank
17 Jul 2019, 13:14
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 4985

Re: EPDM tube diffusers

For increasing oxygen you need fine bubbles, for airlifts you take better take the coarse bubble disc. 245 mm ist enough.

Regards,
Frank
by Frank
16 Jul 2019, 21:03
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 4985

Re: EPDM tube diffusers

The discs are quite easy to use, the tubes are more difficult from my point of view.

https://images.app.goo.gl/b3ZoJBxEnuREceWG9

Best regards,
Frank
by Frank
16 Jul 2019, 16:51
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 4985

Re: EPDM tube diffusers

Image

You have another 20-30 mbar pressure, but that is unimportant, because the power consumption of the air pump goes down also.

Best regards,
Frank
by Frank
16 Jul 2019, 11:13
Forum: Technical discussion
Topic: EPDM tube diffusers
Replies: 25
Views: 4985

Re: EPDM tube diffusers

Hi,

I work with them. You need additionally a funnel.

Best regards,
Frank
by Frank
01 Jul 2019, 11:18
Forum: Technical discussion
Topic: Short Outlet without T-Piece?
Replies: 0
Views: 1630

Short Outlet without T-Piece?

Hello all,

what kind of outlet you expect more efficient?
  • short (20 cm) horizontal pipe after bow (without T)
  • longer (40-50 cm) horizontal T-piece after bow
Best regards,
Frank
by Frank
09 Jun 2019, 23:21
Forum: Pond construction
Topic: Screen type pre-filter
Replies: 2
Views: 1581

Re: Screen type pre-filter

Hello Werner,

2 x 90 mm outlet could never bring 30-40 m³/h with airlift. They assume pumps after the sieve. Calculate 10m³/h per 110 mm pipe in gravity mode maximum.

A self made criel solution would be the best in your case.

Regards,
Frank