Hi All,
Any expert can assist me to calcuate if using AquaMedic OR3500 to drive this waterflow rate pump from a sump tank, all the way to a tank height of 2.5ft before rushing out those flowrate into the main tank.. how much will be the actual flowrate??
As i am aware that there might be some head loss speed due to the height of the tank that drive out those flow rate...
Listed below is the spec. of this pump,
max capacity : 3500L/H (c900 gph)
max head : 3.3m (c 10.7)
AquaMedic do provide the operating chart on their website.
http://www.aqua-medic.de/en/service/...0_100.012_.pdf
Think you miss it.
It just below where you found the specifications.
If the height of the tank is 2.5ft, you must also look at the distance between the sump and the main tank.
So it probably > 2.5ft.
Hope this helps!
The max head for the pump you mentioned is 3.3m. The height you pumping is about 0.76m. You have a balance of about 2.5m.
Head loss a contributed by length of piping, material of piping, elbows, bents, connectors, outlet nozzle, etc. The factors for all these parts are not available for consumer parts (there is a huge handbook for head loss calculation for industrial parts). You can probably use a estimated additional head loss of about 0.5~0.8m for a very rough estimation.
BC
Hi All,
thanks for the value informations..but i dun know how to calcuate it... i need to connect to a external co2 reactor using ehiem hose and pump up all the way to 2.5ft height and spilt it to two output pipes on top of the tank...so wat will be the actual output rate???2000L/H?? need at least 3 times the turnover... base on a 6ft by 2ft by 2.5ft tank size...
what is the height difference between the pump and aquarium water level? you gave dimensions for your tank but not your sump tank nor height difference between your main tank and sump tank.
look at the chart in the link provided by evolim83. look at the blue line; it shows 3500l/hr at 1 meter head. so you can approximate the flow rate if you have the head height. however, the approximate flow rate does not take into account factors listed by bclee.
thomas liew
Hi Bro,
Noe i get what it mean on the calcuation... base on the tank height of the 2.5ft, already loss 0.76m.. with additional of height between the main and sump tank height, there is another 2.5 ft..
wow, that meaning it will be having a total head loss of at least 2.02m with those pipings..that mean it only left 1.28m for the head speed...base on the chart shown, the estimate flow rate will be only around 1000- 1100 L/H?? Am i right???
As my overall tank height with cabinet is 5ft..
Originally Posted by bclee
yup. you've got it.
you'll need to note that the specification mentioned open bore. so the inner diameter of your pipes and fittings should not be smaller that the pump outlet.
to achieve your intended flow rate, you can add more pumps.
why not live with what you have and see how things work out. add pumps later, if needed.
thomas liew
ok, thanks tawauboy...How i knew how to calcuate already... Thanks to all whom have reply in this articles to share this information's with me as well..
Cheers...
Hi all,
If let say, do an set up like set up A(dry).. putting the pump on top of the sump... height difference will be at 4ft from the main tank and connect the inlet with an ehiem hose to pump in the water thru the pump before pumping it out to the main tank... will it help in decease the head loss height...???
As earlier, was mentioned about 5ft height from the bottom of the sump tank to main tank that the pump is being submerged ...
if raise the pump to be sitting on top of the sump tank..(Height of the sump tank say to be 1.5ft) like that meaning to say it have being reduce to 1.56m head loss.. estimate flowrate will be increase to 1800L/H???
if raise higher let say mounting the pump below the main tank inside the cabinet, will it increase the flowrate as well?? same menthod as stated above on the jointing of the inlet using ehiem hose...difference of the head loss will be at 1.26m...estimate flowrate is 2000L/H???
Last edited by coolbucks; 22nd Oct 2006 at 04:43.
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Coolbucks, if you place the pump on top of the sump, you need to be really sure that the pump will not have any power outage at all. If there is a power outage either caused by someone accidentally switch off that pump or the power supply being interrupted by the power supplier, that pump may lost it's siphon. And if the power was restored back when the pump has lost the water siphon, you may end up with an overheating pump or worse a damaged pump.
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Hi BFG,
Noted with thanks..but will it help to reduce the head loss?? anyone tried before using this brand and set up like set up A type using this brands??
For head loss calculation, the height should be taken from the top surface of the water body that you are pumping from (ie. the water surface of the sump, e.g.) to the outlet height... not the level of the pump to outlet.
Placing the pump on top of the sump tank do not reduce the head loss. Remember that in this case work still has be done to suck water into pump before pumping it into the tank above. Anyway this setup is not recommended. It creates a negative presure on the suction side and can cause cavitations at the impeller.
In setup A, you can notice that it is the siphoning action that brings the water down into the pump. Therefore, there is no work needed on the pump to "suck" in water from the sump.
BC
Hi Bclee,
ok,noted about it... i am curious about those pump that are meant for external usage and will this type of product having the same failure rate like iwaki brands??
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