|
|
|
|
#376
10/07/2004, 08:23 PM
|
|||
|
|||
|
Yes they look almost the same as the deltec except for one detail. If you look closely you'll see small metallic gaskets between the two black rubber caps and the body of the impellor. I was told by H&S that their skimmers work so much better with this metallic rings. I think they lessen the friction and make the impellor rotate much faster.
Alex |
|
#377
10/07/2004, 10:30 PM
|
|||
|
|||
|
The pumps are all synchronous motors, meaning that they always rotate at the same RPM (locked to the frequency of the supply voltage). What the disks may do is allow the motor to use less power to rotate however.
Zeph |
|
#379
10/08/2004, 04:34 AM
|
|||
|
|||
|
Deltec used to fit washers like this years and years ago made out of stainless steel but found that over time the washers wore and in some cases the wawsher could fall between the magnet and the stator and cause damage to the pump.
On a pin wheel skimmer when the air supply is turned off it causes the impellor to move forward in the housing and the ends of the pins can rub against the end cap. This is detected as a noise from the pump. Fitting the 2 washers prevents the impellor from moving so far forward and so when the airflow is reduced due to a blockage in the airline for instance there is no increase in noise. This was common practice some years ago with pump manufacturers. The down side of the washers is that they hold the pinwheel away from the end cap and potentially increase the space where water can pass between without contacting the pinwheel. The result of this is a lowering of performance. Presumably H&S have adjusted for this on the pinwheel design. Deltec believe that the increase in noise is a benefit as it gives a warning that the air side has started to clog up so that it can be rectified to bring the performance back to standard. To recap The washers do not have a positive benefit during normal operation and unless allowed for in the pinwheel design can have a negative effect. Stuart |
|
#381
10/08/2004, 06:33 AM
|
|||
|
|||
|
If you look at both the Deltec and the H&S pinwheels you will see that they are a proper injection moulded part.
If you then look back at the BubbleKing impellor you will see that each pin has to be individually glued into a machined ABS block. Presumably it is easier to hammer in titanium pins than to fasten in plastic pins which is the way that they used to be made. I have never seen a worn Plastic pinwheel before and there are no other benefits. The patent for the pinwheel technology is owned jointly by Deltec and H&S. The Bubbleking impellor is allowed to be made under licence from the other 2 companies. B***S*** can be very dangerous in the wrong hands Stuart |
|
#382
10/08/2004, 12:32 PM
|
|||
|
|||
|
Quote:
Alex |
|
#383
10/08/2004, 12:48 PM
|
|||
|
|||
|
I have never heard of a skimmer pinwheel of either type failing due to wear.
Perhaps you are letting your stated occupation get the better of you. Stuart |
|
#387
10/09/2004, 06:51 AM
|
|||
|
|||
|
Alexmarto,
Which H&S do you have and on what size of tank tank+bioload? |
|
#388
10/09/2004, 07:36 AM
|
|||
|
|||
|
I have this one (A200 - 2 x 1260):
  It's rated for a 2200L (580gal) but i bought it for a 230gal that should arrive at the end of October. It will be a normal SPS only reef. I used the skimmer in a 200L (50gal) tank for a few months, with a reduced flow, just to see how it performs. I'm very pleased with it, the foam started to collect after only one hour after being connected for the first time. It is very noisy. I can hear it in every room in my house (small house), with the doors open off course, but my wife complians a lot about that. It's not working now, it's waiting for the biggest tank but the only diference that I noticed in my actual 200L tank after the skimmer was running on it, was the reduced growth of algae on the front glass. Apart from that, I haven't noticed nothing regarding colors and growth but as I told before, the skimmer worked only for 2 or 3 months. Alex |
|
#389
10/09/2004, 10:30 AM
|
|||
|
|||
|
Alexmarto,
What is the source of the noise? I thought Eheim 1260 pumps were mostly silent. Does the noise come from the needle-wheels frothing the water column? I've heard that beckett style skimmers are quite loud so I hoped needle-wheel skimmers would be mostly silent. Noise is a concern for me. |
|
#390
10/09/2004, 01:28 PM
|
|||
|
|||
|
I assume the noise is coming from the air pipes connected to the 1260.
I have such noise in my Deltec. Alexmarto, very impressive skimmer. I'll check the prices for this one. |
|
#392
10/09/2004, 02:03 PM
|
|||
|
|||
|
Excellent! Those intakes can easily be muffled.
|
|
#394
10/09/2004, 03:58 PM
|
|||
|
|||
|
You can get a silencer, have ya seen the Grotech silencers?
|
|
#395
10/09/2004, 05:13 PM
|
|||
|
|||
|
Considering the cost of these Euro-skimmers, the
manufacturers ought to include such a muffler for free. Oh well... Build a plastic box with a lid. "Tuperware" may work, but a thick and rigid acrylic box might be required. How big should the box be? I don't know. Too large is just a waste of space but too small might impede the air flow. Once you decide on the size and build the box, drill a bunch of 1/4" holes in the lid and install two John Guest fittings to the side. Connect the skimmer air intakes to the JG fittings. Pack the box with enough polyester filter floss to dampen the sound but not too tightly or it will restrict the air flow. It wouldn't hurt to incorporate a chamber of activated charcoal into the design to purify the incoming air. I've also considered using pre-made filters for paint spraying masks. These filters often include carbon and remove impurities from the air down to the micron level. I'm not familiar with the Grotech silencer, but I'll look it up. Another possible solution is piping the air intake to an outside location. For example, put 1/2" PVC pipe inside the wall to an attic space and connect the skimmer air intakes to the pipe. Supposedly, outside air has more oxygen than an enclosed house so injecting this into your skimmer might improve ORP But outside air also might have more pollution, especially in Spring when there's tons of pollen in the air. |
|
#396
10/09/2004, 05:36 PM
|
|||
|
|||
|
I found a photo of the Grotech skimmer with it's air intake
silencer in this thread. Looks very nice.. Grotech silencer image Unless Grotech is available in your area, it may be faster and easier to just build a muffler. |
|
#398
10/10/2004, 03:03 AM
|
|||
|
|||
|
Seems to me like Deltec came up with "the perfect solution for a non exsisting problem" with their bundle of powerheads attached to one skimmer,probably great while it´s new,but what´s in it for the long term reliability??
And what about stray voltage leak with all these powerheads? They are in fashion here in sweden were I live,but I think that´s partly because they are higly priced over here,and that sort of automatically put´s them in a high end bracket. I´v used Top fathom´s 3&400´s with Little giant MD5´s for many years,and found them very efficient,reliable and easy to maintain. The noice from from the venturi´s been taken care of by simply sticking the intake tubes into the lid of the collection cup. And if you´re worried about the size of bubbles in your skimmer,try hanging a small powerhead (like a maxijet etc) inside the skimmer, to chop up them bubbles. Ps,regarding the comparison European skimmers vs.cars.I love US cars,epecially Cadillac STS. Ds |
|
#399
10/10/2004, 08:34 AM
|
|||
|
|||
|
Quote:
Where do I begin. First of, the problem of better skimming of organic matter and such in a tank is a perpetual problem only with half done temporary solutions for the time being. So, they or anyone else relaly ocme up with a solution to a problem that wasn't there. IF you a tank, then you ahve that same problem by default. Second, their skimmer or any other for that matter is as reliable as the pump they use to make it work. Eheims are some of the more reliable pumps in the market. I know people that have some running for more than just "a couple of yeas". Voltage leak only by virtue of a powerhead is a mute point buddy. Otherwise I have to tell you that everyone with a maxijet, tunze, etc has voltage in their tanks. Think about it. Quote:
Quote:
__________________
Arguing with ignorant people is an exercise in futility. They will bring you down to their level and once there they will beat you with their overwhelming experience. |
|
#400
10/10/2004, 10:37 AM
|
|||
|
|||
|
First,the european deltecs doesn´t come with eheims,but some italian look-alikes.
Second,all submersible powerheads create stray voltage in the tank. Third,you never had an european car,right uh´ No,seriously-I do not belive superduperskimming is necessary,the idea is to remove organic waste from water,not everthing else with it. So as long as what´s in the collectioncup look´s and smells the way it does,I´ll stick to my venturiskimmers. |
|
|
Bob
Linear Mode
