“Pure” is not one thing. Each rung on this ladder is a defined grade with its own acceptance limits, and each costs meaningfully more to hold than the one below it. The first job of a specification is to stop climbing at the right rung.
Same equipment vocabulary, two different definitions of “proven”. Pharma answers to a pharmacopoeia and an inspector; semiconductor answers to yield.
Semiconductor UPW is documented on the Semiconductor & Microelectronics industry page rather than as a standalone equipment page — the specification is inseparable from the fab process it serves.
Ultra-pure water is not a machine; it is a train with no weak link. Pre-treatment protects the membranes, the membranes carry the bulk removal, and the final three stages exist purely to hold the grade all the way to the point of use.
Ultra-pure water is aggressive and unstable. It leaches from whatever contains it and it is a nutrient-poor but colonisable environment. A system that generates to spec and then loses it in the pipework has failed — which is why this category is always sold as two halves.
The three grades this category delivers, side by side. Note that WFI and UPW are not ranked against each other — one is judged microbiologically, the other electrically.
On an ultra-pure project a large part of the scope is not hardware. It is materials traceability and a documentation set that will survive an audit years after commissioning.
Continuous conductivity and TOC on the loop, trended and alarmed, is the difference between catching a drift and explaining a deviation. Our monitoring and service contracts are built for exactly this duty.
Client names withheld under confidentiality. Full commissioning and qualification data available on request.
Send a feed water analysis, your peak and average demand, and the standard you are held to. We will return the configuration, the loop concept, the instrument list and the documentation index that comes with it.