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Solenoid valve

K

koma

Jan 1, 1970
0
I'm trying to build a machine that is capable of getting carbonated
soda out of a bottle.

So far I've tried a kind of centrifugal pump (used in windshield
washers), but the result was _foam_.

I don't know if solenoid valve is a better idea, they seem pretty
expensive and seem to have problem with closing at low fluid preassure?

(I was thinking of having the bottle upside down and using the valve to
control the outlet)

Does anyone know of a pump that will handle carbonated liquids?

Or perhaps will solenoid valves do after all?

And, most important, can someone point me to a website where I can buy
these things for a reasonable price?

Cheers
 
B

Bob Stephens

Jan 1, 1970
0
I'm trying to build a machine that is capable of getting carbonated
soda out of a bottle.

So far I've tried a kind of centrifugal pump (used in windshield
washers), but the result was _foam_.

I don't know if solenoid valve is a better idea, they seem pretty
expensive and seem to have problem with closing at low fluid preassure?

(I was thinking of having the bottle upside down and using the valve to
control the outlet)

Does anyone know of a pump that will handle carbonated liquids?

Or perhaps will solenoid valves do after all?

And, most important, can someone point me to a website where I can buy
these things for a reasonable price?

Cheers

Check out restaurant and bar supply places to see what they use in the soda
guns.


Bob
 
J

Jim Thompson

Jan 1, 1970
0
I'm trying to build a machine that is capable of getting carbonated
soda out of a bottle.

So far I've tried a kind of centrifugal pump (used in windshield
washers), but the result was _foam_.

I don't know if solenoid valve is a better idea, they seem pretty
expensive and seem to have problem with closing at low fluid preassure?

(I was thinking of having the bottle upside down and using the valve to
control the outlet)

Does anyone know of a pump that will handle carbonated liquids?

Or perhaps will solenoid valves do after all?

And, most important, can someone point me to a website where I can buy
these things for a reasonable price?

Cheers

Back some gezillion years ago, I worked on a booze dispenser...
metered so that the barkeep couldn't cheat the house.

Bottles were up-ended into receptacles with tubing feeding to the
dispenser at the bar.

A vent tube up into the end of the bottle provided air return.

Booze was dispensed using a "roller-pump"... tygon tubing with rollers
so dispense was positive displacement... much like heart-lung machines
work.

...Jim Thompson
 
J

Joerg

Jan 1, 1970
0
Hello,
Does anyone know of a pump that will handle carbonated liquids?

As Jim said roller pumps are possibly an option. But they aren't cheap.
You can buy the roller assembly separately and supply your own motor
which is how we did it.

Or perhaps will solenoid valves do after all?

There are valves that avoid contact with the medium to be controlled,
something that can be an issue with food items. They have a wedge with a
dulled edge that squishes onto a plastic hose to shut off the flow.

And, most important, can someone point me to a website where I can buy
these things for a reasonable price?


Ok, here goes. This is one of the suppliers we have used in the past but
I am only familiar with their air pressure operated versions:

http://www.bimba.com/products/products.htm

Besides the food contact issue I believe that a valve that directly
operates on the sugary soda stuff might clog up pretty quickly.

Regards, Joerg
 
J

Jim Thompson

Jan 1, 1970
0
Hello,


As Jim said roller pumps are possibly an option. But they aren't cheap.
You can buy the roller assembly separately and supply your own motor
which is how we did it.



There are valves that avoid contact with the medium to be controlled,
something that can be an issue with food items. They have a wedge with a
dulled edge that squishes onto a plastic hose to shut off the flow.




Ok, here goes. This is one of the suppliers we have used in the past but
I am only familiar with their air pressure operated versions:

http://www.bimba.com/products/products.htm

Besides the food contact issue I believe that a valve that directly
operates on the sugary soda stuff might clog up pretty quickly.

Regards, Joerg

Back (way back... like ~1984) when the wife and I used to run the
snack shop at the high school football games, soda pop came to us
separated... cans of "syrup" and CO2 cannisters... blended at the
serving head. MESSY disassembly after each game and soak in hot water
to clean up.

...Jim Thompson
 
D

Don Lancaster

Jan 1, 1970
0
koma said:
I'm trying to build a machine that is capable of getting carbonated
soda out of a bottle.

So far I've tried a kind of centrifugal pump (used in windshield
washers), but the result was _foam_.

I don't know if solenoid valve is a better idea, they seem pretty
expensive and seem to have problem with closing at low fluid preassure?

(I was thinking of having the bottle upside down and using the valve to
control the outlet)

Does anyone know of a pump that will handle carbonated liquids?

Or perhaps will solenoid valves do after all?

And, most important, can someone point me to a website where I can buy
these things for a reasonable price?

Cheers
A peristaltic pump can handle most anything.

--
Many thanks,

Don Lancaster voice phone: (928)428-4073
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml email: [email protected]

Please visit my GURU's LAIR web site at http://www.tinaja.com
 
G

GregS

Jan 1, 1970
0
A peristaltic pump can handle most anything.

And you can make one of thos without a whole lot of trouble.
Just get a geared motor, and have a sprocketed wheel,
and you might need an outer ring to compress a plastic
hose wrapped around the sproket.

greg
 
J

Jim Thompson

Jan 1, 1970
0
And you can make one of thos without a whole lot of trouble.
Just get a geared motor, and have a sprocketed wheel,
and you might need an outer ring to compress a plastic
hose wrapped around the sproket.

greg


Pondering less complex solutions... how about simply compressed air,
since the bottle is inverted? Or CO2 ?:)

...Jim Thompson
 
Jim Thompson skrev:

just go buy a sodastream
Back some gezillion years ago, I worked on a booze dispenser...
metered so that the barkeep couldn't cheat the house.

Bottles were up-ended into receptacles with tubing feeding to the
dispenser at the bar.

A vent tube up into the end of the bottle provided air return.

Booze was dispensed using a "roller-pump"... tygon tubing with rollers
so dispense was positive displacement... much like heart-lung machines
work.

...Jim Thompson

every bar around here uses a system so the drinks are alway the same
size and counted by a computer. but no pumps and the bottles can stand
normally on a shelf.

It fits on each bottle instead instead of the screwcap or cork, just
sticks out about 5cm. To pour a drink a device connected to a computer
fits over the part of the device that sticks out of the bottle and when
you turn it upside down, out comes exactly 2cl. guess it is just a
solenoid with the coil part in the device that is connected to the
computer.
it can even recognize different bottles so different bottles can have
different prices and it is all stored in the computer.

-Lasse
 
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