what is a "needle wheel" skimmer? difference between needle wheel and venturi???

blitz99

blitz99

Member
i have a "Needle Wheel" skimmer and the "little impeller thingy" broke... is that impeller the needle wheel?
can i just go to the store and buy a new pump or do i need a specific type of pump?
it was rated at 1000 lph, so 240gph (right???)
can i just get an equivalent powerhead and the skimmer will continue to function?
 
blitz99

blitz99

Member
embarrassed to say :)
it's the jebo ps75, does the job far better then my seaclone did.
i took it apart to clean it and dropped the little white impellar, it f'ing broke... i should probably just buy a brand new one for 30 bucks, spare parts and all.
but in the mean time i'd like some sort of skimming action.
 
stanlalee

stanlalee

Active Member
the needlewheel impeller on the pump is what makes it a needle wheel. Most needle wheel skimmers are venturi skimmers. some needle wheel skimmers still skim well with a regular pump impeller but the only way to find out is to try it. On the other hand there are tons of needlewheel replacement pumps if you cant just purchase the needle wheel alone.
 
acrylic51

acrylic51

Active Member
Originally Posted by Blitz99
embarrassed to say :)
it's the jebo ps75, does the job far better then my seaclone did.
i took it apart to clean it and dropped the little white impellar, it f'ing broke... i should probably just buy a brand new one for 30 bucks, spare parts and all.
but in the mean time i'd like some sort of skimming action.
Check around on the big auction site....you might find one cheap.....And NO Needlewheel skimmers are not venturi skimmers..........They draw air in similar to a venturi skimmer, but they aren't a venturi skimmer......
 
candycane

candycane

Active Member
Venturi actually means to vent. So techinically they are venturi skimmers. Just instead of having a single flattened blade, usually the blades are covered with ridges of bumps. So it chops the incoming air up MUCH better then a flat imp. would. You can check out Ocean Runner pumps. I don't think those are that expensive, but then again I havent purchased one in a long time.
 
stanlalee

stanlalee

Active Member
venturi definitely doesn't mean "to vent". a venturi usually refers to a cylinder or tube that tappers at some point to increase velocity of fluid or gas passing thru it. I'm more commonly used to the term being into cars and motorcyle inductions, intake manifolds an such. Most venturi skimmers have a venturi attachment at the pump and wether its a needle wheel or venturi are really independent of each other. You can have a venturi skimmer that isn't a needle wheel (seaclone) or a venturi skimmer that is a needle wheel (coralife). with a beckett injector the venturi is part of the injector design (and a big part of it) so technically they are venturi skimmers as well.
 
candycane

candycane

Active Member
Venturi means to vent. For air to be sucked in to by means of ventilation, not force. I won't argue over it, go google it.
 
stanlalee

stanlalee

Active Member
googled "venturi definition" and this is the 1rst thing that popped up.
a fitting or device that consists of a tube constricted in the middle and flared on both ends. A fluid's velocity will increase and a fluid's pressure will decrease while passing through the construction. Placing a tube or pipe at the constriction point creates a vacuum. Fluid or air can then be drawn in through the tube. A hydro-therapy jet draws air in and mixes it with the water using this principle. Vinyl liner: the vinyl membrane that acts as the container to hold or contain the water.
anything with a hole vents, a venturi does more than just vent.
 
blitz99

blitz99

Member
regardless of your disagreement, i've come to the conclusion that RIO makes pumps that will work for me... not real sure about this needle wheel stuff, seems to me like most powerheads have an impeller that look the same as the "needle wheel" i had.
 
candycane

candycane

Active Member

Originally Posted by Stanlalee
a fitting or device that consists of a tube constricted in the middle and flared on both ends. A fluid's velocity will increase and a fluid's pressure will decrease while passing through the construction. Placing a tube or pipe at the constriction point creates a vacuum. Fluid or air can then be drawn in through the tube. A hydro-therapy jet draws air in and mixes it with the water using this principle. Vinyl liner: the vinyl membrane that acts as the container to hold or contain the water.
Anyone who reads this, and has an oven, knows that this is a reallllllllllllllllllllly long explanation for "to vent". This "Fluid or air can then be drawn in through the tube. A hydro-therapy jet draws air in and mixes it with the water using this principle." is the only part that you need to read. VENTING is merely an opening allowing something to escape or enter. Now I am right and let it be.
 
candycane

candycane

Active Member
Originally Posted by Blitz99
regardless of your disagreement, i've come to the conclusion that RIO makes pumps that will work for me... not real sure about this needle wheel stuff, seems to me like most powerheads have an impeller that look the same as the "needle wheel" i had.
You pulled apart a bunch of pumps? or went to their website? Because RIO impellers are flat. however they do draw in a MASSIVE amount of air, just the air bubbles are actually bigger because of the restrictor. The needle wheel basically would just be better because of the fact that it is the difference between air coming directly through a hose, or air going through a hose and then a blender. This is that you will most likely get a very WET foam that is light brown. Which means that all the nutrients are getting sucked out of your tank.
 
stanlalee

stanlalee

Active Member

Originally Posted by candycane
is the only part that you need to read. VENTING is merely an opening allowing something to escape or enter. Now I am right and let it be.
your right thats what venting is, we are talking venturi. I did what you said and googled it now you disagree with google. Now I'll let it be.
 
candycane

candycane

Active Member
No, google said what i said - only worded it more technically. I guarantee you can not, not respond. My nephew is like that. However, the fact still remains that I am correct. Dictionary dot com. ALSO!!!! Google is now a legitimate word in Webster's Collegiate Dictionary. SO!!! I meant to find the text book dicitionary definition of the word Venturi even though it is NOT of Inproper English Origin. Does this make you feel better, why are you continuing on with it. Just let it be, I know I am right, probably 90% of the board knows that I am right. And that is all that I am saying about it. I will not argue over this and will ignore any future posts. You are wrong, I am verifiably correct. Sorry.
Now back to needle wheels. Some of them look like that round one, while I believe the one that corallife uses is actually an impeller with long stick like blades with small dots all over them. You can actually buy those pumps. I check for a bit today.
 
blitz99

blitz99

Member
Originally Posted by MoneyMan
Needle wheel...
interesting that the more i read about my skimmer the more i learn it never was a "needle wheel", just venturi...
appreciate that picture, thanks.
 
stanlalee

stanlalee

Active Member
Originally Posted by candycane
No, google said what i said - only worded it more technically. I guarantee you can not, not respond. My nephew is like that. However, the fact still remains that I am correct. Dictionary dot com. ALSO!!!! Google is now a legitimate word in Webster's Collegiate Dictionary. SO!!! I meant to find the text book dicitionary definition of the word Venturi even though it is NOT of Inproper English Origin. Does this make you feel better, why are you continuing on with it. Just let it be, I know I am right, probably 90% of the board knows that I am right. And that is all that I am saying about it. I will not argue over this and will ignore any future posts. You are wrong, I am verifiably correct. Sorry.
.
funny you think you have the right to continue and I dont and more funny you think you are right and everyone agrees with you. I'll continue as long as I damn well like or until mods tell me otherwise. Since your the mature big person why do you keep replying. anybody here can google exactly what I did and you told me to do and will get the same quote I put up. Your an idiot all you said was venturi means "to vent" originally. Hard not to be more technical than that! I quoted googles 1rst definition word for word and that was from YOUR referral and it MUCH more closely matches what I said than "to vent" and your second attempt to fix it up. You can believe venturi is whatever you want to.
let me add this so I can be done with it. if there is no INCREASE IN VELOCITY of the fluid or gases passing thru a "venturi" then you dont have a venturi, you just have fluid or gas passing thru something (which is all "venting" would describe).The increase in velocity is the whole purpose of adding a venturi attachment wether it be a maxijet or kent attachment or a carburetor of a motorcycle. NO WHERE in your definitions or explanations does it mention an increase in velocity when passing thru it OR a reduction or restriction in the passage that causes the venturi effect. A venturi by definition does this by a RESTRICTION or REDUCTION in the size of the tube, passage or whatever. and you have the balls to be cocky about explaining a venturi as venting
 
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