Mixing valve

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fishguy306

fishguy306

Peacock Bass
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Oct 24, 2005
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Looking for an odd piece of equipment. Most (all?) mixing valves seem to be temp based, mixing hot and cold water. I'm searching for one that will mix different percentages. For example every 10 gallons of water from source A it will allow 1 gallon from source B. Anyone know of such a device?
 
Will you be drawing directly from 2 different water taps, using totes or similar containers you want to draw water from or a combination of both?

The reason I ask is that at my former job they used a device called a venturi valve that would siphon a 'set' amount of cutting oil from an elevated tote to mix with a 'set' amount of tap water to get the correct mix for machining auto parts.
 
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Ideally the water sources would be mixed in the storage tanks just so everything has a chance to stabilize. At the moment we have water coming from the RO unit and then the tap. We will the storage tank with RO, it turns off once the float valve is reached, then top off with tap. The system works, would just love to see it automated.

It is an interesting idea though, having them separate. With the venturi valve can you adjust how much is pulled out to mix?
 
I think the venturi valve needs to be sized for a specific purpose and not adjustable, sorry I just installed them as they were designed by the builder of the equipment.
 
Just kicking some other ideas around here, I'm curious if a 3 float valve combo would work for your set up.
1.) Your current RO float valve controls the amount of RO in the storage tank
2.) 2nd float valve will open to admit tap water once RO float valve shuts off
3.) 3rd float valve will turn off tap water when tote is full

I'm sure someone somewhere has set up a similar system that you want, I just don't remember seeing one.

Maybe contact John at Jehmco and see if they have a unit that would function the way you need or at least point you in the correct direction.

The problems I can see would be if you don't fully empty the tote of the RO/tap admixture each time, the balance of RO to tap would vary between uses. The other problem would be a float valve failure of either RO or tap with the wrong mixture of water parameters.
 
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The three float valve idea would have the issue you mentioned, unless we drained the entire tank eventually the ratios would be off. With the water mixing prior to entering the tank that wouldn't be an issue. At the moment it works as we use nearly the entire tank but it wont always be that way. I should take a look at Jehmco, they do seem to have a lot of the hard to find parts .
 
fishguy306 said:
The three float valve idea would have the issue you mentioned, unless we drained the entire tank eventually the ratios would be off. With the water mixing prior to entering the tank that wouldn't be an issue. At the moment it works as we use nearly the entire tank but it wont always be that way. I should take a look at Jehmco, they do seem to have a lot of the hard to find parts .
Click to expand...

It is possible to use drip emitter on float valves so the GPH is set via the emitter ratio. So each time the barrel fills from any previous water level, the ratios will be topped off one in the same as a manual controlled ratio.

Example: 1 GPH RO and 2 GPH tap for example would produce a 33%/66% ratio, respectively
 
The other thing to consider is a needle valve. It will need to be manually calibrated initially and once annually as well. BRS sells needle valves that hook directly to RO fittings. I have a number of love them. Very solid quality.
 
JK47 said:
It is possible to use drip emitter on float valves so the GPH is set via the emitter ratio. So each time the barrel fills from any previous water level, the ratios will be topped off one in the same as a manual controlled ratio.

Example: 1 GPH RO and 2 GPH tap for example would produce a 33%/66% ratio, respectively
Click to expand...

This could work out well, especially once we have the ratio down that we need. Not sure exactly what it is yet but shouldn't be hard to figure out. Only issue is I've noticed a lot of the drip emitters aren't very accurate, would need to test them.

JK47 said:
The other thing to consider is a needle valve. It will need to be manually calibrated initially and once annually as well. BRS sells needle valves that hook directly to RO fittings. I have a number of love them. Very solid quality.
Click to expand...

Are you using this one?

https://www.bulkreefsupply.com/vertex-precision-needle-valve.html

That is an interesting idea. Would take a bit of adjusting to get the ratios right but shouldn't be terrible.

Thanks for the thoughts! This project is a bit more complex than I anticipated.
 
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