Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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DI Water compatibility
Is there a list of materials that are recommended for use when designing a system that will be recirculating DI water.
Gregory KremerPaint Temperature Control - Romeo, Michigan, USA
2004
A lot of that depends on what the purity of your "DI" is. For ultra pure, teflon is the only practical material. As you get to a lower purity, other plastics are frequently used. PVC is used by many at the 1 meg ohm purity. Thicker plastics that can be threaded (and not break regularly) are preferred by many to the use of PVC glued joints. The volatiles in the glue leach out for a long period. Plastics that are weldable is another approach. For low purity, Stainless steel is acceptable. Copper and galvanized are a no-no.
James Watts- Navarre, Florida
2004
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