Pumping downwards?

snowman88 · 10-18-2003, 07:51 AM

Have some nagging suspicion about pumps placed on a high point, eg on top of a case inside a rad box, that the pump would have to suck real hard and hence it wouldn't be as good as placing it on the case "floor". Can anyone clarify?

bozo · 10-18-2003, 09:59 AM

thats why the res would have to be on top with the pump

Althornin · 10-19-2003, 02:45 AM

cant see how in a closed loop system, that it matters at all....

Boli · 10-19-2003, 10:23 AM

Pumps don't "suck" at least not most of the ones used here. They use an impellor and THROW the water out of the side outlet. - The negative pressure this creates is negliable, that is why most pumps you have to prime them.

Some Impellor pump work better with their inlet at the top so gravity helps into forcing the water into the mechanism but on a closed loop it doesn't really matter where your pump is or what posistion.

~ Boli

nexxo · 10-19-2003, 12:04 PM

True. The only reason for putting a pump at the bottom in a closed loop is to prevent air bubbles from taking up residence in the pump.

10-18-2003, 07:51 AM	#1
snowman88 Cooling Neophyte Join Date: Sep 2003 Location: Singapore Posts: 5	Pumping downwards? Have some nagging suspicion about pumps placed on a high point, eg on top of a case inside a rad box, that the pump would have to suck real hard and hence it wouldn't be as good as placing it on the case "floor". Can anyone clarify?

10-19-2003, 10:23 AM	#4
Boli Cooling Savant Join Date: Apr 2003 Location: Blackburn / Dundee Posts: 451	Pumps don't "suck" at least not most of the ones used here. They use an impellor and THROW the water out of the side outlet. - The negative pressure this creates is negliable, that is why most pumps you have to prime them. Some Impellor pump work better with their inlet at the top so gravity helps into forcing the water into the mechanism but on a closed loop it doesn't really matter where your pump is or what posistion. ~ Boli __________________ 1800+ @ 2247 (214x10.5) - STABLE, 512MB PC3700 TwinX Cosair RAM, NF7-S v2.0, GeForce3 Ti200 Parallel BIM, 120.1 Thermochill, Eheim 1048, Maze 3, Maze4 GPU, "Z" chipset, 1/2" tubing, PC-70: 5x120mm & 9x80mm fans. Internet Server & second machine (folding 24/7): 512MB DDR RAM, XP2000+

10-19-2003, 12:04 PM	#5
nexxo Cooling Savant Join Date: Jul 2002 Location: Brimingham, UK Posts: 385	True. The only reason for putting a pump at the bottom in a closed loop is to prevent air bubbles from taking up residence in the pump. __________________ "There is a thin line between magic and madness"

10-18-2003, 09:59 AM	#2
bozo Cooling Neophyte Join Date: Jul 2003 Location: singapore Posts: 39	thats why the res would have to be on top with the pump

10-19-2003, 02:45 AM	#3
Althornin Cooling Savant Join Date: Dec 2002 Location: Houston, TX, USA Posts: 221	cant see how in a closed loop system, that it matters at all....

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