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Cleaning with RO/DI water

KempWaterfall

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Sorry not industrial water look up Aqueous Ozone water or Di Water you will see all kinds of water to clean with water is going to be your new best friend in years to come
 
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KempWaterfall

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Kemp Waterfall
Coped this for you guys

Hard Municipal / City Water
Water is considered “hard” when it has a relatively high concentration of calcium and magnesium ions (two of the salts which make up TDS). Hard water received this name because it requires more soap to get a good lather and makes the water “hard” to work with. This same concept applies to parts cleaning and washing, more soap is required if the water is harder or higher TDS. The main difficultly in parts cleaning does not come during the washing step but trying to use the same hard water to rinse the parts. Hard water does not rinse as clean and often leaves spots on parts from minerals and TDS in the water.



What is RO – Reverse Osmosis water purification?
Reverse Osmosis (RO) is the opposite of a natural process, osmosis which is the movement of water molecules across a semipermeable membrane that naturally moves water from a low ion concentration to a higher ion concentration. This natural process is used by our bodies to get water to our individual cells.

Reverse osmosis works by applying pressure to the more concentrated (higher TDS) side of a semipermeable membrane, water molecules are pushed back across the membrane to the less concentrated (lower TDS) side, resulting in more purified water. The RO process can typically remove 90-99% of most contaminants.

Reverse Osmosis is often used to partially clean-up city / municipal tap water before any other purification technology is used to remove the remaining 1-10% of contaminants such as deionization.



What is DI- Deionization water purification?
Deionization (DI) filters can be referred to by many names: Ion Exchange, Strong Acid/Strong Base, Polishing, Nuclear Grade. Nuclear grade DI filters can remove Inorganic chemicals down to very low parts per billon (PPB) levels. This makes such DI filters excellent for producing Type I, 18.2 Megohm water. Type I, 18.2 Megohm water is commonly used for precision cleaning applications.

Deionization filters function by an exchange of positive hydrogen and negative hydroxyl ions for the positive and negative contaminant ions in the water. Calcium and other positive contaminants, exchange places with the hydrogen molecules and iodine and the like other negative contaminant, exchange places with the hydroxyl molecules.

Measuring DI Quality

Instead of based on TDS, DI quality is measured by conductivity and expressed in microsiemens/cm and is used to measure water with a large number of ions present. Resistivity is expressed in megohms-cm and is used in the measurement of water with few ions. Conductivity= 1/resistivity so for example, at 25° C, 18.2 megohm water, which is the highest purity water obtainable also, has a conductivity of 0.055 microsiemen/cm.

Over time, positive and negative contaminants in the water displace all the active hydrogen and hydroxyl molecules on the DI resin and the filter must be replaced. Regeneration of the deionization filter is possible, but only in an industrial environment setting.

Deionization is an on-demand process supplying purified water when needed. This is important because water at this extreme purity level degrades quickly. The nuclear grade deionization resin or polishing mixed bed resin removes almost all the inorganic contaminants in the water increasing the resistivity of the water to a maximum of 18.2 megohm-cm. However, deionization does not remove all types of contaminants like dissolved organic chemicals. Deionization filters are not physical filters but charge exchange filters so they do not have a pore size and cannot remove bacteria or particulates.

How to Store DI Water

Once DI water has been made it has had most of its ions removed and will attack any material to get them back. The most preferred container for DI water would be a stainless steel container and glass .

316 Stainless steel is well suited for storing DI water and having smooth, clean and passivated welds make the tanks even better. Many times Best Technolog electropolishes contact surfaces to ensure even better storage compatibility. Often the systems Best Technology sells for use with DI water are 316 Stainless steel

Since DI water has had most of its ions removed it naturally wants to come back to equilibrium and does so by leaching ionized minerals from its surrounding materials. That is why storing DI in PVC and other polymers is not advised as non-moving, stagnant DI water will have the chance to pull ionized molecules from surrounding materials. NOTE: PVC is commonly used in DI water plumbing systems because most metalic plumbing would cause a leaching problem like copper or brass, but with PVC there is no problem because there is a continuous flow in the plumbing

The most common cause of stored DI water to deteriorate or lose ultra low conductivity is the exposure to CO2 from air. The CO2 converts to carbonic acid in the water which causes the conductivity to increase. Adding an N2 blanket over the DI water in your storage tank can overcome this issue.

Use of DI Water for parts cleaning and washing
DI water is important for precision parts cleaning because:

  1. Since all or most of its mineral content removed it is very hungry to acquire minerals from your parts which is commonly the dirt and contaminates on the surface of your parts.
  2. Ultrasonics are able to cavitate more effectively which an absense of particulates in the DI water.
  3. Since there are no minerals in DI water, it leaves no residue on your parts, so you have no water spotting after parts dry.
  4. DI water will remove any remaining detergent, alkaline cleaning chemistry or soaps from your parts when to rinse parts.
  5. Alkaline cleaning solutions, soaps and detergents perform better is solution with DI water as the detergent is not wasted in converting the mineral content of the water (as explained above), all of its cleaning action can be directed to the part.
  6. Since all contaminates have both organic and inorganic components and they typically increase the conductivity of DI water, a part cleaning system can be set up with conductivity probes to monitor the final rinse of the product in an ultrasonic tank. The final rinse process can be automatically set based on the conducitivity measurements and programmed to introduce more DI water to achieve the proper desired level.
 

Pinosan

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DI only needed for spot free rinsing like with windows. Too harmful To fittings to use long term. That's why soft water for truck mounts recomended.
any acid rinse we use is about 4 on the ph scale. some go down to 2. Don't you think this will also affect the machines in the long run?

Di water will harm your equipment in the long run but it will be a very very long run. If you are in your 40's, your machine will outlive you using Di water. don't trip just use it.
 

Pinosan

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First of all let me say Hello to everyone. I have been cleaning for 38 years Master Cleaner.. You can Clean with Di Water have been for 5 or 6 years . Yes there is a huge difference in the cleaning If I start out with a new bottle it is 18 Mega ohms now that is cleaning but it will stay like that for about 400 gallons then goes down to about 4 or 5 Mega ohms and I can get about 6 months before I need to get new. Is it worth it I would not clean any other way my cost of chems is very low and carpets are soft and fluffy I carry 230 gallons of Di Water on my truck and can also make it on site. As a Added plus you can wash the wife's car and windows and not have to dry it off
I have a question if you don't mind, do I have to carry water on board or can I generate it as i go?
I was thinking to buy a cylinder of DI but I was told that the pressure will not be enough to feed my Tm and I would need to have a water tank on board? is this true ?
 

KempWaterfall

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Yes you can run a Di tank looks just like a soft water tank I have a mix bed tank some are a A & B Tank water in water out just check your TDS in
 

KempWaterfall

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Sorry you can run water wright in it then in to your TM Check your TDS you will go through Di fast if you have very hard water 200 to 500 TDS
 

KempWaterfall

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I see your in Calf. look up Puretec Industrial water you can rent bottles from them They Have a huge train that make the water
 

LookNGood

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Mine is Pure Rinse I run a water softener first then two carbon blocks, 1 micron, 3 ros then to the di sounds like a lot but not you can make your own system
I just looked up and called the pure rinse people they said they don't make the RO filters anymore unfortunately
 

KempWaterfall

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Kemp Waterfall
Look up us waters.com find axon filters or I run 4x21 you will want 3 of them with hosing 3 Big blues talk to one of the guys and tell them what you are doing and they will help you. You can also try B&R in Mesa Arizona they build them look on there web site I think I seen it for around 2100. but if it was me I would go with 3 4x21 or 2 4x40 low psi no pump hope this helps PS Does anyone run o3 water or DIO3 water in their TM
 

KempWaterfall

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Axeon - HF4 Series Membrane Elements - HF4-4021 - 1000 GPD Membrane Element
Axeon PVC Membrane Housing 4" x 14" | 200521

Axeon HF4-4040 4.0" x 40" 2500 GPD Membrane
Axeon PVC Membrane Housing 4" x 40" | 200527

US Water Big Blue Triple Filtration System 4.5 X 10 | BBF3-10


Pick and what you want this is from https://www.uswatersystems.com
 

Mike Krall

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Look up us waters.com find axon filters or I run 4x21 you will want 3 of them with hosing 3 Big blues talk to one of the guys and tell them what you are doing and they will help you. You can also try B&R in Mesa Arizona they build them look on there web site I think I seen it for around 2100. but if it was me I would go with 3 4x21 or 2 4x40 low psi no pump hope this helps PS Does anyone run o3 water or DIO3 water in their TM
Love my Axeon filters. On my second year with them doing window cleaning.

I'm thinking about using an onboard storage tank but just read one of your posts above where it said you need stainless steel.