Need help with 24V wall transformer sizing

[Cheap5.0]

I need a booster pump for my home RO/DI system, and im looking at this one:

http://123filter.com/catalog/isprin...gpd-reverse-osmosis-water-filter-pmp8806.html

It does not come with a wall wort/transformer. I can see in the pic that it draws 0.65 amps, and its a 24 volt pump.

A quick search on amazon gives me this for 24V transformers:

http://www.amazon.com/s/ref=nb_sb_n...lectronics&field-keywords=24+volt+transformer


How do i know which one will be correctly sized for this pump? The company said they do not sell the transformers for the pumps, they merely sell the pumps as a replacement item for someone who bought a kit from them.

 

[Falcon67]

Get the 1A item, that will be plenty for the pump. As long as the wart is capable of delivering at least what the pump draws, it'll work. Also, a quick search shows that Amps = VA / volts, so the "40VA" units are 1.66A items. Which will also work.

 

[ishiboo]

Yeah, the pump itself says .6somethingA on it... so you need at least 16W output on the transformer/16VA. Since it is a pump, I would go with about 2X that rating on a small ****** transformer to help with startup and longevity.

 

[knobby]

shurflow sells some 120v booster pumps as well as 24v with matching transformers this may make for a simpler solution

 

[foolishpride]

The nameplate on the pump shows 24 Volts D.C. So make sure you get a D.C. adapter.

 

[Aceman]

Buy a 24V DC power supply with the amp rating you need. Never hurts to go a little bigger either.

 

[Cheap5.0]

Excellent, thanks everyone. Saves me $80 buying that pump over the aquatec 8800 w/ the $30 transformer they need.

edit: Just looking over the 24V DC supplys, and it appears thats commonly a laptop charger?

If so...i have a pile of laptop chargers that i could try. So long as its 24V and at least 2X the required amperage i should be good right? Since it appears the pump comes with loose wires for the power supply i dont have to worry about matching plugs.

 

[foolishpride]

edit: Just looking over the 24V DC supplys, and it appears thats commonly a laptop charger?

If so...i have a pile of laptop chargers that i could try. So long as its 24V and at least 2X the required amperage i should be good right? Since it appears the pump comes with loose wires for the power supply i dont have to worry about matching plugs.

Sounds good to me. I'd just use the laptop charger.

 

[wyliesdiesels]

Excellent, thanks everyone. Saves me $80 buying that pump over the aquatec 8800 w/ the $30 transformer they need.

edit: Just looking over the 24V DC supplys, and it appears thats commonly a laptop charger?

If so...i have a pile of laptop chargers that i could try. So long as its 24V and at least 2X the required amperage i should be good right? Since it appears the pump comes with loose wires for the power supply i dont have to worry about matching plugs.

If u wanted to make the setup P-n-P(plug-n-play), u could solder a matching size plug onto the pump leads but that's just how I would do it if it were mine!