I need a pump to move cold water around a machine. The water is in a tub
in a freezer I have made some holes in.
Currently I have a submersible pump in the tub but being overkill for my
needs it gets warm and warms the water.

The flow need is little more than a trickle, it can be submersible if it
not likely to get warm during use or external.

Anyone recommend anything?

On Sun, 28 Aug 2011 22:57:23 +0100, R D S wrote:

The flow need is little more than a trickle, ...

Windscreen washer pump? You used to be able to get them seperately
from the tanks that they tend to be built into now.

--
Cheers
Dave.

On Sun, 28 Aug 2011 22:57:23 +0100, R D S wrote:

I need a pump to move cold water around a machine. The water is in a tub
in a freezer I have made some holes in.
Currently I have a submersible pump in the tub but being overkill for my
needs it gets warm and warms the water.

The flow need is little more than a trickle, it can be submersible if it
not likely to get warm during use or external.

Anyone recommend anything?

You don't say what power supply you wish to use or may have available
or what duty cycle you need.
A car windscreen washer pump may be suitable but might not like
continuous duty, a decent model shop may stock pumps intended for use
in model submarines. OTHO it might just be as easy to get a ready made
condensate pump from a refrigeration specialist or supplier.
Those bottle cooling units you see in pubs often have them and there
is usually a firm in an area who maintain such things listed in yellow
pages etc.

G.Harman

On Aug 28, 10:57*pm, R D S wrote:

The flow need is little more than a trickle, it can be submersible if it
not likely to get warm during use or external.

High flow pump, run intermittently. If you need a continuous low flow
rate, pump into a header tank (a float switch might be useful for the
control) and then use a gate or neeedle valve to control the delivered
flow rate.

Cheap pumps like this, with long lifespan ratings, are available
cheaply from desktop ornamental fountains and cat water dishes -
especially if you recycle via car boot sales or charity shops.

On 28/08/2011 22:57, R D S wrote:
I need a pump to move cold water around a machine. The water is in a tub
in a freezer I have made some holes in.
Currently I have a submersible pump in the tub but being overkill for my
needs it gets warm and warms the water.

The flow need is little more than a trickle, it can be submersible if it
not likely to get warm during use or external.

Anyone recommend anything?

Continuous low flows are well suited to peristaltic pumps, which would
be easy to make.

SteveW

On Aug 28, 10:57*pm, R D S wrote:
I need a pump to move cold water around a machine. The water is in a tub
in a freezer I have made some holes in.
Currently I have a submersible pump in the tub but being overkill for my
needs it gets warm and warms the water.

The flow need is little more than a trickle, it can be submersible if it
not likely to get warm during use or external.

Anyone recommend anything?

also a fishtank pump


NT

After serious thinking R D S wrote :
I need a pump to move cold water around a machine. The water is in a tub in a
freezer I have made some holes in.
Currently I have a submersible pump in the tub but being overkill for my
needs it gets warm and warms the water.

The flow need is little more than a trickle, it can be submersible if it not
likely to get warm during use or external.

Anyone recommend anything?

A peristaltic pump might do it, if the flow is adequate. They provide a
very precise calibrated flow.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

"Harry Bloomfield" wrote in message
. uk...
After serious thinking R D S wrote :
I need a pump to move cold water around a machine. The water is in a tub
in a freezer I have made some holes in.
Currently I have a submersible pump in the tub but being overkill for my
needs it gets warm and warms the water.

The flow need is little more than a trickle, it can be submersible if it
not likely to get warm during use or external.

Anyone recommend anything?

A peristaltic pump might do it, if the flow is adequate. They provide a
very precise calibrated flow.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk



http://www.williamsonpumps.co.uk/

Baz