Demin Water Material Compatibility

Before permanent installation test the equipment with the chemicals and under the specific conditions of your application.

Demin water material compatibility. If your temperature differs from this it may affect the compatibility of the fluid with the given pump materials by accelerating the reaction. Demineralised water has poor taste and thirst quenching characteristics. Its distribution through pipes and storage tanks is not possible because the aggressive water would leach metals and other materials from the pipes and other plumbing materials. The data provided for the chemicals is at 70ºf 21ºc unless otherwise noted.

Depends on the water temperature involved. Bear in mind that anything metallic will yield a small amount of metal back into the water until passivated and then still smaller amounts after that. Hence it is safe to use ss metallurgy for dm water for for producing steam. This process is almost identical to deionisation a process which produces deionised water.

3 0 chemical compatibility guide for metallic materials in addition to this chemical compatibility chart report tr 60c bal seal has two other reports. These include calcium magnesium sodium and potassium. The table below lists the most common interactions. When co2dissolves in demineralized water forming carbonic acid the ph of the water drops typically to about 5 or 6.

For some application particularly for producing steam iron contamination by corrosion products are not tolerated. Report tr 60a chemical compatibility guide for bal seal ptfe filled ptfe and polyethylene seal materials and report tr 60b chemical resistance to typical hplc high pressure liquid. Oxygen o2 from the ambient air would be constantly available and ph would stay in this low range. Ss is preferable choice of material for dm water mainly due to near neutral ph condition.

In an open loop system with consistent use of demineralized water this would be a problem. Materials used in the pump and pumping systems must be chemically compatible. If more than this then an epdm or butyl base would be better. The information in this chart has been supplied to cole parmer by other reputable sources and is to be used only as a guide in selecting equipment for appropriate chemical compatibility.

This is again due to its lack of minerals. Demineralised water and deionised water are virtually the same things. If it is less than 70 deg c then i would recommend a natural rubber based hose.